Description
Posters will be up for the entire meeting (April 16-19), but we block out this time each day for people to have a chance to view and discuss the posters.
Andrei Dambis
(Sternberg Astronomical Institute)
16/04/2012, 17:10
Paper
A statistical-parallax analysis of the sample of Chen at al. (2010), which the authors purport to consist mostly of red horizontal-branch stars selected based on SEGUE spectroscopy, shows that the luminosities of the stars of this sample are overestimated, on average, by ~2 mag in terms of absolute magnitude. This result implies that the sample actually consists mostly of main-sequence and...
Dr
Andrew Pickles
(LCOGT Las Cumbres Observatory Global Telescope), Prof.
Wayne Rosing
(LCOGT)
16/04/2012, 17:10
Intercalibration between systems
We summarize plans to monitor, calibrate and validate photometric observations with our autonomous, robotic network of 2m, 1m and 40cm telescopes. These are sited globally to optimize our ability to observe time-variable sources.
Wide field "context" cameras aligned with our network telescopes cycle through BVriz filters spanning our optical range every ~2 minutes, measuring instantaneous...
Dr
Thomas Rauch
(Institute for Astronomy and Astrophysics, Kepler Center for Astro and Particle Physics, Eberhard Karls University, Tübingen, Germany)
16/04/2012, 17:10
Thermal soft X-ray emission is detected from many hot hydrogen-rich white dwarfs (spectral type DA) with an effective temperature in excess of 20 000 K. Most of the objects with effective temperatures < 40 000 K have virtually pure hydrogen atmospheres while the majority of the hotter ones emit X-ray fluxes lower than predicted by hydrogen model atmospheres and therefore must contain heavier...
Dr
Thomas Rauch
(Institute for Astronomy and Astrophysics, Kepler Center for Astro and Particle Physics, Eberhard Karls University, Tübingen, Germany)
16/04/2012, 17:10
The German Astrophysical Virtual Observatory (GAVO) provides the registered Virtual Observatory (VO) service TheoSSA (Theoretical Stellar Spectra Access, http://dc.g-vo.org/theossa). It is dedicated to the easy access of VO users to theoretical stellar spectral energy distributions, calculated with any model-atmosphere code.
We show examples for TheoSSA in operation.
Dr
Elena Pancino
(INAF - Bologna Observatory)
16/04/2012, 17:10
Poster
The GES is a wide field spectroscopic survey recently started with the FLAMES@VLT in Cerro Paranal. It will produce radial velocities more accurate than Gaia's for faint stars (down to V~18), and astrophysical parameters and abundances for ~100000 stars, belonging to all Galactic populations. 300 nights were assigned in 5 years (with the last year subject to approval after a detailed report)....