43 Subdwarf PPTs View free & download

Observational properties of pulsating subdwarf B stars. PowerPoint PPT Presentation

Observational properties of pulsating subdwarf B stars. - With help from many, including Andrzej Baran, Staszek Zola, ... Teff=29635 K (29,500 /-500) log g = 5.518 (5.50 /-0.05) Near core He exhaustion (0.74% by mass) ...

With help from many, including Andrzej Baran, Staszek Zola, ... Teff=29635 K (29,500 /-500) log g = 5.518 (5.50 /-0.05) Near core He exhaustion (0.74% by mass) ...

| PowerPoint PPT presentation | free to download

The evolution of heliumrich subdwarf B stars PowerPoint PPT Presentation

The evolution of heliumrich subdwarf B stars - ... population of faint blue blue stars in our galaxy and giant elliptical galaxies ... Early 1980's helium-rich and helium-poor objects thought to be separated by a ...

... population of faint blue blue stars in our galaxy and giant elliptical galaxies ... Early 1980's helium-rich and helium-poor objects thought to be separated by a ...

| PowerPoint PPT presentation | free to view

Spectroscopic Analyses of HeliumRich Subdwarf B Stars PowerPoint PPT Presentation

Spectroscopic Analyses of HeliumRich Subdwarf B Stars - Evolution has been the subject of much debate although binary evolution is ... high mass loss on the red giant branch undergo a late helium core flash on the ...

Evolution has been the subject of much debate although binary evolution is ... high mass loss on the red giant branch undergo a late helium core flash on the ...

| PowerPoint PPT presentation | free to view

The progeny of binary white dwarf mergers extreme helium stars, R CrB stars and subdwarf B stars PowerPoint PPT Presentation

The progeny of binary white dwarf mergers extreme helium stars, R CrB stars and subdwarf B stars - 24, June 2002. white dwarf mergers. The progeny of binary white dwarf mergers; ... Progeny of WD WD mergers ? Extreme Helium stars. RCrB stars. subdwarf B stars ...

24, June 2002. white dwarf mergers. The progeny of binary white dwarf mergers; ... Progeny of WD WD mergers ? Extreme Helium stars. RCrB stars. subdwarf B stars ...

| PowerPoint PPT presentation | free to view

The progeny of binary white dwarf mergers extreme helium stars, R CrB stars and subdwarf B stars - white dwarf mergers. The progeny of binary white dwarf mergers; ... (Landau & Lifshitz 1958) CO He merger frequency: 4.4 10-3 yr-1 (Neleman's et al. 2001) ...

white dwarf mergers. The progeny of binary white dwarf mergers; ... (Landau & Lifshitz 1958) CO He merger frequency: 4.4 10-3 yr-1 (Neleman's et al. 2001) ...

| PowerPoint PPT presentation | free to view

Nordic-Baltic Research School PowerPoint PPT Presentation

Nordic-Baltic Research School - Variability discovered by Ostensen et al. (2001) Five frequencies ... Amplitudes between 0.3-10.2 mmag. Subdwarf sdB star. August 5-11, Moletai (165cm) 2004 ...

Variability discovered by Ostensen et al. (2001) Five frequencies ... Amplitudes between 0.3-10.2 mmag. Subdwarf sdB star. August 5-11, Moletai (165cm) 2004 ...

| PowerPoint PPT presentation | free to download

News from the Canary Islands PowerPoint PPT Presentation

News from the Canary Islands - Carlos S nchez (TCS, 1.55 m) Big field OGS (1 m) Stare (10 cm) www.iac.es/ot ... Juan A. Belmonte. Sebasti n Jim nez. Hans Deeg. Lexter Fox (just PhD finished) ...

Carlos S nchez (TCS, 1.55 m) Big field OGS (1 m) Stare (10 cm) www.iac.es/ot ... Juan A. Belmonte. Sebasti n Jim nez. Hans Deeg. Lexter Fox (just PhD finished) ...

| PowerPoint PPT presentation | free to download

Stellar oscillations across the H-R diagram PowerPoint PPT Presentation

Stellar oscillations across the H-R diagram - Sun-as-a-star data from VIRGO experiment, SPM and LOI instruments ... 105 square degrees just above galactic plane in the constellation Cygnus ...

Sun-as-a-star data from VIRGO experiment, SPM and LOI instruments ... 105 square degrees just above galactic plane in the constellation Cygnus ...

| PowerPoint PPT presentation | free to download

VLT ultracam observations of PG1336018 PowerPoint PPT Presentation

VLT ultracam observations of PG1336018 - ... (top right) is a 3-channel photometer, used for measuring starlight in three ... In 2005 May it was mounted on one unit of the ESO Very Large Telescope at ...

... (top right) is a 3-channel photometer, used for measuring starlight in three ... In 2005 May it was mounted on one unit of the ESO Very Large Telescope at ...

| PowerPoint PPT presentation | free to view

Brown Dwarf Science with VLST PowerPoint PPT Presentation

Brown Dwarf Science with VLST - Brown Dwarf Science with VLST. Outline: The Big Questions. Where we are and how VLST would help... Brown Dwarf Science with VLST. 2MASS and SDSS find ...

Brown Dwarf Science with VLST. Outline: The Big Questions. Where we are and how VLST would help... Brown Dwarf Science with VLST. 2MASS and SDSS find ...

| PowerPoint PPT presentation | free to download

Internal dynamics from asteroseismology for two sdB pulsators residing in close binary systems PowerPoint PPT Presentation

Internal dynamics from asteroseismology for two sdB pulsators residing in close binary systems - Internal dynamics from asteroseismology for two sdB pulsators residing in close binary systems Val rie Van Grootel (Laboratoire d Astrophysique de Toulouse ...

Internal dynamics from asteroseismology for two sdB pulsators residing in close binary systems Val rie Van Grootel (Laboratoire d Astrophysique de Toulouse ...

| PowerPoint PPT presentation | free to download

Progress in the asteroseismic analysis of the pulsating sdB star PG 1605 072 PowerPoint PPT Presentation

Progress in the asteroseismic analysis of the pulsating sdB star PG 1605 072 - and related objects Progress in the asteroseismic analysis of the pulsating sdB star PG 1605+072 Val rie Van Grootel (Laboratoire d Astrophysique de Toulouse, France)

and related objects Progress in the asteroseismic analysis of the pulsating sdB star PG 1605+072 Val rie Van Grootel (Laboratoire d Astrophysique de Toulouse, France)

| PowerPoint PPT presentation | free to download

SOME ELEMENTAL ABUNDANCES IN GLOBULAR CLUSTERS AND IN METAL DEFICIENT STARS IN OUR GALAXY Normal low PowerPoint PPT Presentation

SOME ELEMENTAL ABUNDANCES IN GLOBULAR CLUSTERS AND IN METAL DEFICIENT STARS IN OUR GALAXY Normal low - ... only from higher-excitation Si I yellow-red lines ... n-capture, recent lab transitions. Three groups contribute especially: Lund, Liege, Wisconsin ...

... only from higher-excitation Si I yellow-red lines ... n-capture, recent lab transitions. Three groups contribute especially: Lund, Liege, Wisconsin ...

| PowerPoint PPT presentation | free to view

Una%20b - The (second) widest ultracool binary: a challenge for very low-mass formation ... The widest system containing an L dwarf component. Primary: HD 221356 (F8.0V; ...

The (second) widest ultracool binary: a challenge for very low-mass formation ... The widest system containing an L dwarf component. Primary: HD 221356 (F8.0V; ...

| PowerPoint PPT presentation | free to download

To Be or Not to Be: The Mysteries of Disk Formation Around Rapidly Spinning Be Stars PowerPoint PPT Presentation

To Be or Not to Be: The Mysteries of Disk Formation Around Rapidly Spinning Be Stars - To Be or Not to Be: The Mysteries of Disk Formation Around Rapidly Spinning Be Stars Douglas R. Gies Department of Physics and Astronomy Center for High Angular ...

To Be or Not to Be: The Mysteries of Disk Formation Around Rapidly Spinning Be Stars Douglas R. Gies Department of Physics and Astronomy Center for High Angular ...

| PowerPoint PPT presentation | free to download

The Measure of Stars PowerPoint PPT Presentation

The Measure of Stars - Title: Slide 1 Author: Radford University Last modified by: Academic Technologies Created Date: 4/4/2006 5:56:38 PM Document presentation format: On-screen Show (4:3)

Title: Slide 1 Author: Radford University Last modified by: Academic Technologies Created Date: 4/4/2006 5:56:38 PM Document presentation format: On-screen Show (4:3)

| PowerPoint PPT presentation | free to view

Astroparticle physics 1. stellar astrophysics and solar neutrinos PowerPoint PPT Presentation

Astroparticle physics 1. stellar astrophysics and solar neutrinos - Astroparticle physics. 1. stellar astrophysics and solar neutrinos. Alberto Carrami ana. Instituto Nacional de Astrof sica, ptica y Electr nica. Tonantzintla, ...

Astroparticle physics. 1. stellar astrophysics and solar neutrinos. Alberto Carrami ana. Instituto Nacional de Astrof sica, ptica y Electr nica. Tonantzintla, ...

| PowerPoint PPT presentation | free to download

Hello - Jodrell Bank. Registry and DIS. High Volume Storage. Raid 5, 4 Terabyte ... Column: Representation of TD from VOTable. Parser Design. API Typical Operations ...

Jodrell Bank. Registry and DIS. High Volume Storage. Raid 5, 4 Terabyte ... Column: Representation of TD from VOTable. Parser Design. API Typical Operations ...

| PowerPoint PPT presentation | free to download

A New Group of DustForming Hot Stars PowerPoint PPT Presentation

A New Group of DustForming Hot Stars - Gemini, Chile. Lick Obs., USA. NASA IRTF, USA. 8-m. 3-m. 3-m. opt.spectra, R=60000. CFHT, USA ... H line profiles are mostly double-peaked ...

Gemini, Chile. Lick Obs., USA. NASA IRTF, USA. 8-m. 3-m. 3-m. opt.spectra, R=60000. CFHT, USA ... H line profiles are mostly double-peaked ...

| PowerPoint PPT presentation | free to view

ASTEROSEISMOLOGY OF LATE STAGES OF STELLAR EVOLUTION PowerPoint PPT Presentation

ASTEROSEISMOLOGY OF LATE STAGES OF STELLAR EVOLUTION - 1- Pulsators in late stages of stellar evolution: their location ... reflexion of waves with nodes at transition zones. fractional mass above transition zones ...

1- Pulsators in late stages of stellar evolution: their location ... reflexion of waves with nodes at transition zones. fractional mass above transition zones ...

| PowerPoint PPT presentation | free to download

Planetary nebulae: definition, observational characteristics, and diagnostics PowerPoint PPT Presentation

Planetary nebulae: definition, observational characteristics, and diagnostics - A round or axisymmetric shape, sometimes with multiple shells or outer haloes. ... Silkworm. NGC 6302. Hb 5. Size does matter! 28. 28. A necessary question...

A round or axisymmetric shape, sometimes with multiple shells or outer haloes. ... Silkworm. NGC 6302. Hb 5. Size does matter! 28. 28. A necessary question...

| PowerPoint PPT presentation | free to view

Stellar Properties PowerPoint PPT Presentation

Stellar Properties - Advantages: relatively easy and good for fainter targets. Disadvantages: need good conditions ('photometric') for reliable measurements ...

Advantages: relatively easy and good for fainter targets. Disadvantages: need good conditions ('photometric') for reliable measurements ...

| PowerPoint PPT presentation | free to download

Please%20silence%20your%20cell%20phones PowerPoint PPT Presentation

Please%20silence%20your%20cell%20phones - 12% of nearby stars are K stars (68% are M stars) ... 600 Myr old (http://www.solstation.com/stars/eps-erid.htm) epsilon Eridani: K2 V dwarf ...

12% of nearby stars are K stars (68% are M stars) ... 600 Myr old (http://www.solstation.com/stars/eps-erid.htm) epsilon Eridani: K2 V dwarf ...

| PowerPoint PPT presentation | free to download

Extrasolar Planet Observational Studies: The Italian Contribution PowerPoint PPT Presentation

Extrasolar Planet Observational Studies: The Italian Contribution - Extrasolar planets one of the major astronomical topic of the last decade ... Transit survey approved for GTO bright time on VST. PI: Snellen (Leiden Observatory) ...

Extrasolar planets one of the major astronomical topic of the last decade ... Transit survey approved for GTO bright time on VST. PI: Snellen (Leiden Observatory) ...

| PowerPoint PPT presentation | free to view

V652 Her: evidence that white dwarf mergers really do happen PowerPoint PPT Presentation

V652 Her: evidence that white dwarf mergers really do happen - D.Pollacco, QUB, R.Starling, MSSL, P.W.Hill, St Andrews University. based on work published in MNRAS 313, 671, MNRAS 321,111 and accepted by MNRAS and A&A ...

D.Pollacco, QUB, R.Starling, MSSL, P.W.Hill, St Andrews University. based on work published in MNRAS 313, 671, MNRAS 321,111 and accepted by MNRAS and A&A ...

| PowerPoint PPT presentation | free to view

Rare Populations from the SDSS PowerPoint PPT Presentation

Rare Populations from the SDSS - Stars WD, CV, BHB, BD etc. Serendipity. Rare populations found in SDSS ... 12 Ts and ~100 Ls. Fan et al. 2001. Fan, Narayanan, Strauss, Becker, White et al. z ...

Stars WD, CV, BHB, BD etc. Serendipity. Rare populations found in SDSS ... 12 Ts and ~100 Ls. Fan et al. 2001. Fan, Narayanan, Strauss, Becker, White et al. z ...

| PowerPoint PPT presentation | free to view

Halo White Dwarf Controversy PowerPoint PPT Presentation

Halo White Dwarf Controversy - Halo Velocity Dispersion. Old Disk. Velocity. Dispersion. Biases? 2s. 1s ... stellar halo should have 2 2.5 x 10-5 pc-3. But, what does this really mean? ...

Halo Velocity Dispersion. Old Disk. Velocity. Dispersion. Biases? 2s. 1s ... stellar halo should have 2 2.5 x 10-5 pc-3. But, what does this really mean? ...

| PowerPoint PPT presentation | free to download

CCDs Charge Coupled Devices PowerPoint PPT Presentation

CCDs Charge Coupled Devices - On Visible and Optical Wavelengths. Image Recording Techniques ... Semiconductor Noise Shot, Flicker, White Noise. Resistor / Thermal Noise ...

On Visible and Optical Wavelengths. Image Recording Techniques ... Semiconductor Noise Shot, Flicker, White Noise. Resistor / Thermal Noise ...

| PowerPoint PPT presentation | free to view

Hello! - DATA MODELS: This initiative aims to define the common elements of astronomical ... Federation and joining of information become possible and Grid computing is ...

DATA MODELS: This initiative aims to define the common elements of astronomical ... Federation and joining of information become possible and Grid computing is ...

| PowerPoint PPT presentation | free to view

The%20Photometric%20Calibration%20of%20the%20Blanco%20Dark%20Energy%20Survey%20(DES) PowerPoint PPT Presentation

The%20Photometric%20Calibration%20of%20the%20Blanco%20Dark%20Energy%20Survey%20(DES) - detects even light cirrus under a full range of moon phases (no ... These assume that only two filters will be observed each night (either g and r, or i and z) ...

detects even light cirrus under a full range of moon phases (no ... These assume that only two filters will be observed each night (either g and r, or i and z) ...

| PowerPoint PPT presentation | free to download

Extrasolar Planets and Brown Dwarfs PowerPoint PPT Presentation

Extrasolar Planets and Brown Dwarfs - Definition of a star: a gravitationally-bound sphere of gas massive ... Jovian planets defined to be up to 13 MJ (0.013 M ) Brown dwarfs 0.013 - 0.075 M ...

Definition of a star: a gravitationally-bound sphere of gas massive ... Jovian planets defined to be up to 13 MJ (0.013 M ) Brown dwarfs 0.013 - 0.075 M ...

| PowerPoint PPT presentation | free to view

Starlight and What it Tells Us PowerPoint PPT Presentation

Starlight and What it Tells Us - Faint stars usually have no name. The Names of Sirius. Alpha Canis Majoris (Bayer, 1603) ... Examples: Vega, Sirius. The Main Sequence: F. Temperature: 6000 ...

Faint stars usually have no name. The Names of Sirius. Alpha Canis Majoris (Bayer, 1603) ... Examples: Vega, Sirius. The Main Sequence: F. Temperature: 6000 ...

| PowerPoint PPT presentation | free to view

HydrogenDeficient Stars PowerPoint PPT Presentation

HydrogenDeficient Stars - ... by treating cleveite with mineral acids. ... Cleveite is an impure ... cleveite. Pierre Jules. Janssen: 1824-1907. Lord Rutherford: 1871-1937. Helium ...

... by treating cleveite with mineral acids. ... Cleveite is an impure ... cleveite. Pierre Jules. Janssen: 1824-1907. Lord Rutherford: 1871-1937. Helium ...

| PowerPoint PPT presentation | free to view

The a formalism for the common envelope interaction - The a formalism for the common envelope interaction

The a formalism for the common envelope interaction

| PowerPoint PPT presentation | free to view

Hello - Hello

Hello

| PowerPoint PPT presentation | free to view

Automated Spectral Analysis PowerPoint PPT Presentation

Automated Spectral Analysis - ... Mead 1965, Press et al. 1989): uses a self-modifying cell (AMOEBA) that ' ... UV Flux distributions are often degenerate in EB-V and Teff (even the 2175 bump ...

... Mead 1965, Press et al. 1989): uses a self-modifying cell (AMOEBA) that ' ... UV Flux distributions are often degenerate in EB-V and Teff (even the 2175 bump ...

| PowerPoint PPT presentation | free to view

Searching for Substellar Objects PowerPoint PPT Presentation

Searching for Substellar Objects - ... Search for Substellar Companions in the Halo of Nearby Stars ... Ls. Burrows et al. 1997. Searches for Brown Dwarfs. Companions to nearby stars. Direct Imaging ...

... Search for Substellar Companions in the Halo of Nearby Stars ... Ls. Burrows et al. 1997. Searches for Brown Dwarfs. Companions to nearby stars. Direct Imaging ...

| PowerPoint PPT presentation | free to view

Formation of Galaxies PowerPoint PPT Presentation

Formation of Galaxies - Eccentricity is invariant. Potentials changing rapidly ... Slow potential change: eccentricity is conserved, height above galactic plane ...

Eccentricity is invariant. Potentials changing rapidly ... Slow potential change: eccentricity is conserved, height above galactic plane ...

| PowerPoint PPT presentation | free to download

Evolution of Quasar Population 0 z 6.3 PowerPoint PPT Presentation

Evolution of Quasar Population 0 z 6.3 - Picture of UV ionizing background. Difficulty in studying quasar evolution ... AGN activity in galaxy evolution picture, and the realization of the connection ...

Picture of UV ionizing background. Difficulty in studying quasar evolution ... AGN activity in galaxy evolution picture, and the realization of the connection ...

| PowerPoint PPT presentation | free to view

Two New Close Binary Central Stars of Planetary Nebulae from a Critically Selected Southern Hemisphere Sample PowerPoint PPT Presentation

Two New Close Binary Central Stars of Planetary Nebulae from a Critically Selected Southern Hemisphere Sample - thillwig@chara.gsu.edu. Abstract ... In both cases, the variability shows very little scatter from a sine curve. ... theory he classified a large number of PNe, ...

thillwig@chara.gsu.edu. Abstract ... In both cases, the variability shows very little scatter from a sine curve. ... theory he classified a large number of PNe, ...

| PowerPoint PPT presentation | free to download

Summary of Cool Stars 13 PowerPoint PPT Presentation

Summary of Cool Stars 13 - Rachel Osten (P): Detected variable 3.6 cm and 6 cm emission from the M8.5 V ... Ray Jayarardhana: Accreting brown dwarfs are slow rotators, so disk locking ...

Rachel Osten (P): Detected variable 3.6 cm and 6 cm emission from the M8.5 V ... Ray Jayarardhana: Accreting brown dwarfs are slow rotators, so disk locking ...

| PowerPoint PPT presentation | free to download

ASTR2100 - 12. Star Count Analysis (see Mihalas & Routly, Galactic Astronomy) Define, for a particular area of sky: N(m) = total number of stars brighter than magnitude m per ...

12. Star Count Analysis (see Mihalas & Routly, Galactic Astronomy) Define, for a particular area of sky: N(m) = total number of stars brighter than magnitude m per ...

| PowerPoint PPT presentation | free to download

V652 Her: evidence that white dwarf mergers really do happen - V652 Her: evidence that white dwarf mergers ... The British Council, the Japan Society for the Promotion of ... observationally distinguishable groups of ...

V652 Her: evidence that white dwarf mergers ... The British Council, the Japan Society for the Promotion of ... observationally distinguishable groups of ...

| PowerPoint PPT presentation | free to view

Subdwarf PowerPoint PPT Presentations