Properties of bars and bulges in the Hubble sequence are discussed, based on an analysis of 216 disc galaxies of S0-Sm types (S0s from the Near-Infrared S0 Survey and spirals from the Ohio State University Bright Spiral Galaxy Survey). For this purpose we have collected, and completed when necessary, the various analyses we have previously made
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Properties of bars and bulges in the Hubble sequenceLaurikainen, E. et al.102007
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Properties of Bars in the Local Universe
We studied the fraction and properties of bars in a sample of about 3000 galaxies extracted from SDSS-DR5. This represents a volume limited sample with galaxies located between redshift 0.01
Méndez-Abreu, J. et al.Advertised on:
102008 -
Pulsations in the late-type Be star HD 50 209 detected by CoRoT
Context: The presence of pulsations in late-type Be stars is still a matter of controversy. It constitutes an important issue to establish the relationship between non-radial pulsations and the mass-loss mechanism in Be stars. Aims: To contribute to this discussion, we analyse the photometric time series of the B8IVe star HD 50 209 observed by the
Diago, P. D. et al.Advertised on:
102009 -
QSO size ratios from multiband monitoring of a microlensing high-magnification event
We introduce a new scheme to study the nature of the central engine in a lensed QSO. The compact emission regions could have different sizes in different optical wavelengths, and our framework permits us to obtain the source size ratios when a microlensing special high-magnification event (e.g., a caustic crossing event, a two-dimensional maximum
Goicoechea, L. J. et al.Advertised on:
102004 -
Quantifying downsizing & its origin: the mass assembly of galaxies and the role of AGN
We present our latest results based on the Spitzer Cosmological Surveys about the characterization of the mass assembly of galaxies in the last 12 Gyr. We have analyzed the stellar mass function up to z=4 using a sample of galaxies selected in the rest-frame near-infrared with Spitzer/IRAC, and the SFR function using MIPS data. Our results confirm
Pérez-González, P. G. et al.Advertised on:
102009 -
Quantifying Resonant Structure in NGC 6946 from Two-dimensional Kinematics
We study the two-dimensional kinematics of the Hα-emitting gas in the nearby barred Scd galaxy NGC 6946, in order to determine the pattern speed of the primary m=2 perturbation mode. The pattern speed is a crucial parameter for constraining the internal dynamics, estimating the impact velocities of the gravitational perturbation at the resonance
Fathi, Kambiz et al.Advertised on:
102007