Presentazione di PowerPoint

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Our Research Group on Globular Clusters
Giampaolo Piotto, Dipartimento di Astronomia,
Universita di Padova Responsible of the MODEST
WG9 (Observations)
Post Docs Luigi Rolly Bedin, Yazan Momany,
Ramakant
Singh Yadav, (Alejandra Recio-Blanco)
PhD Students Francesca De Angeli, Marco
Montalto Sandro
Villanova Undergraduate Students Fabrizio De
Marchi,
Antonino Milone Other collaborators Ivan R.
King, Jay Anderson
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Ongoing Research Projects (I)

• Stellar Population in Globular
  Clusters
• Main Sequence Stars
• Mass Functions to the Hydrogen Burning
  Limit (HBL)
• Radius-Luminosity Relations down to the
  HBL
• Initial Mass Functions
• Blue Stragglers
• Horizontal Branch Stars
• Rotation
• Abundance Anomalies
• HB morphology
• Second Parameter
• White Dwarfs
• Globular Cluster Ages
• Relative ages
• Absolute ages

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Ongoing Research Projects (II)

• Dynamics of Globular Clusters
• Absolute Motions
• Internal Dynamics
• Mass segregation
• Proper motions
• Radial Velocities
• Models (see F.D.A.)
• Distances
• Omega Centauri
• Search of Exoplanets in Open Clusters

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Search of Planets in Open Clusters
We employ the photometric transit technique Two
ongoing, multisite surveys on NGC
6791 (CFH, San Pedro Martir, Loiano
NGC 6253 (AAT, ESO)
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NGC 6791
Ten consecutive and simultaneous nights in July
2002 Test of the software A few candidates
identifies
Followup spectroscopic observations ongoing at
the TNG in order to confirm the planetary
nature of the transit
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NGC 6253
Ten nights of simultaneous observations (June
2004) at ESO using (WFI_at_2.2m) and the WFI at the
3.9m AngloAustralian Telescope for a continuous
coverage of 19 hous/day WFI_at_3.9mbroken 10 days
before starting the observations (substituted by
IRIS, for imaging in NIR) Actual Observations
70 at WFI_at_2.2m
27 at WFI_at_3.9m (!!!)
.Observers life..
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Expected Transit detection efficency
Only one transit
Two consecutive transits
Actual Transit detection Efficency,
after observing time loss