Romano L'M' Corradi

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The IPHAS survey

• Romano L.M. Corradi

Instituto de Astrofísica de Canarias Tenerife/La
Palma, Spain
Corrado Giammanco
Instituto de Astrofisica de Canarias Tenerife,
Spain
and the IPHAS collaboration
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IPHAS the INT/WFC Photometric H? Survey of the
Northern Galactic Plane
Area all visible northern Plane at -5o lt b lt
5o (1800 deg2) Observations 2.5m Isaac Newton
Telescope WFC, a mosaic of 4 EEV2kx4k CCDs,
pixel size 0.33, f.o.v. 0.25 degs2 Filters
Ha 6568/95 (120 sec) Sloan r (30
sec) Sloan i (10 sec) at 2
overlapping pointings Magnitude limit (10sigma)
r 20 Survey (basically) completed!
r
i
(WFC)
Ha
(5000A) (9000A)
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The IPHAS collaboration

• UK Barlow, Drew (PI), Evans, Gaensicke, Greimel,
  Knigge, the Irwins, Masheder, Morris, Phillipps,
  Sabin, Skillen, Steeghs, Walton, Unruh, Zijlstra
• Spain Corradi, Giammanco, Mampaso, Martín,
  Rodriguez-Gil, Viironen, Vilchez
• The Netherlands Groot
• USA Drake, Lennon, Sokoloski
• Australia Kovacevic, Miszalski, Parker

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IPHAS

• Home page www.iphas.org
• IPHAS overview Drew et (muchos) al. 2005 MNRAS
  362, 753
• Products
• Point-source Photometric and Astrometric
  Catalogue generated by the Cambridge Astronomy
  Survey Unit.
  Initial data release
  Gonzales-Serrano et al. 2008 MNRAS 388, 89. At
  http//casu.ast.cam.ac.uk/surveys-projects/iphas
• Catalogue of Extended Nebulae Corradi et al. in
  preparation, and a new list of PNe
  Sabin et al. in preparation

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The IPHAS colour-colour diagram
Drew et al. 2005
r-Ha
Pickles (1998) library of stellar spectra
r-i
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The IPHAS colour-colour diagram
Drew et al. 2005
E(B-V)
reddening
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The search for PNe in IPHAS

• Compact PNe ( 5 arcsec) from the IPHAS
  photometric catalogue
• Extended PNe by visual inspection of IPHAS
  mosaics (r-Ha or colour-coded)

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Compact PNe (Viironen et
al. 2008 AA submitted)
Known PNe in IPHAS two-color diagram
All objects selected
Additional 2MASS criterium used
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Compact PNe (Viironen et
al. 2008 AA submitted)
Known PNe in 2MASS two-color diagram
80
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Compact PNe (Viironen et
al. 2008 AA submitted)

• List of 1008 candidates
• 312 known in Simbad (171 PNe)
• 696 new objects, of which 49 are clearly
  extended, 150 barely resolved (arcsec or
  subarcsec), and 550 point-like
• 20 spectroscopically confirmed new small PNe

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IPHASJ200514.59322125.1
Some difficult cases
OIII5007
Hß
NII5755
OIII4363
FeII
Ha
NII6548,6584
SII6717,6731
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IPHASJ012544.65613611.6
Some difficult cases
SII40684076
FeII
OIII4363
Hß
OIII5007
NII5755
Ha
SII6717,6731
CaII
NII6548,6584
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Extended PNe

• Initial release of the IPHAS catalogue of
  extended nebulae (from 18 to 20 hours R.A.)
  Corradi et al. 2009 in preparation

• About 700 nebulae
• 100 known PNe
• 200 candidate new PNe, of which 30
  spectroscopically confirmed
• 300 diffuse nebulae
• 13 known SNR
• 13 candidate "small size" SNRs
• 56 known HII regions
• 5 HH objects

• Discussion on the new PNe candidates from the
  catalogue
  Sabin et al. 2009 in preparation,
  listen to next talk

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SNR S147
This is a (grey) moon
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(No Transcript)
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1st PN discovered Mampaso et al. 2006 AA 458,
212
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OII
NeV
OIII
Hb
OIII
SII
Ha
OI
NII
SIII
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Parsamian21 and new nebula
Two very large candidates projected onto the
heavily crowded Galactic Plane.
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V458 Vul
Wesson et al. 2008 ApJ
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The IPHAS extinction-distances for PNe
A to K main-sequence stars can be used to build
extinction-distance curves for ANY line of sight
in the Galactic plane
Sale et al. 2009 MNRAS 392, 497
E(B-V)
Ha EW (Ang)
K0 star with E(B-V)2.3
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The IPHAS extinction-distances for PNe
The method has been tested on the 190 known PNe
inside the IPHAS area Giammanco
et al. 2009 in preparation, see Poster
Extinction were taken from the literature,
computed from the line fluxes in the Acker et al.
1992 PNe catalogue, or determined using new
spectra obtained on La Palma.
Promising! So far, distances are found for 42
PNe, but the method is highly sensitive to the
precision in the determination of the nebular
extinction, which needs to be improved.
s 0
AV mag
sd s 0 / b
d kpc
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The IPHAS extinction-distances for PNe
Giammanco et al. 2009 in preparation, see Poster
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The IPHAS extinction-distances for PNe
Giammanco et al. 2009 in preparation, see Poster
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A look into the future
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Summary
IPHAS is discovering many hundreds of new PNe
(and any kind of emission-line stars) in the
Northern Galactic Plane. Follow-up spectroscopy
started, but much more needed. With the ability
of determining extinction distances, IPHAS will
provide a 3D map in the Plane for a complete,
surface-brightness limited sample. IPHAS will be
followed by VPHAS to complete the survey in the
Southern side of the Plane.
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The IPHAS extinction-distances for PNe
Giammanco et al. 2009 in preparation, see Poster
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VPHAS The VST Photometric Ha survey of the
southern Galactic Plane
The continuation of IPHAS/UVEX in the Southern
sky. Approved by ESO as a core VST project to be
started as soon as the telescope enters
operations. Instrument 16kx16k CCD OmegaCam
(f.o.v. 1 square degree), on the 2.6mVLT Survey
Telescope at ESO Cerro Paranal (Chile) Filters
U, g, r, i, Ha From 2009?
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Near-IR surveys The UKIRT Infrared Deep Sky
Survey (UKIDSS)

• Plan 2005-2012, 7500 square degs of the Northern
  sky in JHK. Depth (K18.3) is 3 mag deeper than
  2MASS. UKIDSS is made up of five surveys, one of
  which is the nIR equivalent of IPHAS.
• It uses WFCAM on the UK InfraRed Telescope in
  Hawaii. WFCAM has four 2048x2048 Rockwell
  devices, with 0.4 pix-1 for a f.o.v 0.21
  square degs.
• The UKIDSS Consortium is a collaboration of some
  100 astronomers. The data become available to the
  entire ESO community immediately they are entered
  into the archive. Release to the world follows 18
  months after each ESO release.

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Conclusions

• several ongoing optical/IR/(radio) surveys of
  the Galactic Plane a valuable resource to study
  stellar populations in the Galaxy

• Optical surveys like IPHAS/UVEX VPHAS put
  emphasis in the study of emission line objects,
  the tracers of crucial but poorly understood
  phases of stellar evolution (birth and death,
  binarity).

• The combination of optical near-IR photometry
  is a powerful tool to separate the various
  classes of stars.

• IPHAS public Early Data Release available soon!
  Stay posted at http//astro.ic.ac.uk/Resea
  rch/Halpha/North/index.shtml

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Optical surveys
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The UKIRT Infrared Deep Sky Survey (UKIDSS)
http//www.ukidss.org/
extragalactic
     
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The IPHAS colour-colour diagram
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The 2MASS colour-colour diagram
giants
main sequence
AV 3
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A map of the sky IPHAS survey area shown in green
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Numbers of catalogued emission line stars by
magnitude, north (Kohoutek/Wehmeyer) and south
(Stephenson/Sanduleak)

• over 10,000 to be found?

South
south
North
north
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and can explore effects of progressive dust
reddening
E(B-V)-
Dashed A0V reddening line lower limit for
normal stars
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unreddened main sequence (V)
Synthetic tracks compared with a single Aquila
field Upper plot brighter stars (13 lt r lt
18) Lower plot fainter stars (18 lt r lt 20)
reddened giants
Reddened main sequence
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SHS IPHASs older (southern) brother .breaking
the 13th mag barrier
The AAO/UKST Ha survey of the southern Galactic
Plane 4o x 4o Ha, and broad-band red exposures on
film 1-2 arcsec spatial resolution (complete)
UKST Ha image of survey field 233
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Acronyms
IPHAS The INT Photometric Ha Survey of the
northern Galactic Plane Filters
r,i,Ha Instrument Wide Field Camera, on the
Isaac Newton Telescope started August 2003
nearly completed first public data release
soon VPHAS The VST Photometric Ha survey of the
southern Galactic Plane (augmented to include
ug filters from UVEX-S proposal) Filters
ug,r,i,Ha Instrument OmegaCam, on the VLT
Survey Telescope from 2008?
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The survey filters
Transmission v. wavelength
i
r
(WFC)
lc FWHM r 6240
1347 Ha 6568 95 i 7743
1519 units Angstrom
Ha