Ferre-Mateu A.,Insituto de Astrofisica de Canarias |
Ferre-Mateu A.,University of La Laguna |
Vazdekis A.,Insituto de Astrofisica de Canarias |
Vazdekis A.,University of La Laguna |
And 6 more authors.
Monthly Notices of the Royal Astronomical Society | Year: 2012
We characterize the kinematics, morphology, stellar populations and star formation histories of a sample of massive compact galaxies in the nearby Universe, which might provide a closer look at the nature of their high-redshift (z >rsim1.0) massive counterparts. We find that nearby compact massive objects show elongated morphologies and are fast rotators. New high-quality long-slit spectra show that they have young mean luminosity-weighted ages (2Gyr) and metallicities solar or above ([Z/H]>rsim0.0). No significant stellar population gradients are found. The analysis of their star formation histories suggests that these objects have experienced recently enormous bursts which, in some cases, represent unprecedented large fractions of their total stellar mass. These galaxies seem to be truly unique, as they do not follow the characteristic kinematical and stellar population patterns of present-day massive ellipticals, spirals or even dwarfs. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.
Tingley B.,Insituto de Astrofisica de Canarias |
Tingley B.,University of La Laguna |
Bonomo A.S.,Observatoire Astronomique de Marseille Provence |
Deeg H.J.,Insituto de Astrofisica de Canarias |
Deeg H.J.,University of La Laguna
Astrophysical Journal | Year: 2011
One of the persistent complications in searches for transiting exoplanets is the low percentage of the detected candidates that ultimately prove to be planets, which significantly increases the load on the telescopes used for the follow-up observations to confirm or reject candidates. Several attempts have been made at creating techniques that can pare down candidate lists without the need of additional observations. Some of these techniques involve a detailed analysis of light curve characteristics; others estimate the stellar density or some proxy thereof. In this paper, we extend upon this second approach, exploring the use of independently calculated stellar densities to identify the most promising transiting exoplanet candidates.We use a set of CoRoT candidates and the set of known transiting exoplanets to examine the potential of this approach. In particular, we note the possibilities inherent in the high-precision photometry from space missions, which can detect stellar asteroseismic pulsations from which accurate stellar densities can be extracted without additional observations. © 2011 The American Astronomical Society. All rights reserved.