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Infrared two-colour diagrams for AGB stars using AKARI, MSX, IRAS and NIR data
stars: AGB and post-AGB - circumstellar matter - infrared: stars - dust extinction - radiative transfer
2011/10/12
Using a revised version of the catalog of AGB stars by Suh & Kwon (2009), we present various infrared two-colour diagrams (2CDs) for 3003 O-rich, 1168 C-rich, 362 S-type and 35 silicate carbon stars i...
The bright end of the colour-magnitude relation of cluster galaxies
galaxies: clusters: general - galaxies: formation - galaxies: evolution
2011/9/27
We investigate the development of the red sequence (RS) of cluster galaxies by using a semi-analytic model of galaxy formation. Results show good agreement between the general trend of the simulated R...
Colour gradients in normal and compact early-type galaxies at 1
galaxies elliptical and lenticular CD galaxies formation galaxies: evolution
2010/11/15
We have derived colour gradients for a sample of 20 early-type galaxies (ETGs) at 1 < z
spec < 2 selected from the GOODS-South field. The sample includes both nor-mal ETGs (13) having effective radii...
The stellar evolution of Luminous Red Galaxies, and its dependence on colour, redshift, luminosity and modelling
galaxies evolution - cosmology observations - surveys
2010/11/15
We present a series of colour evolution models for Luminous Red Galaxies (LRGs) in the 7th spectroscopic data release of the Sloan Digital Sky Survey (SDSS), computed using the full-spectrum fitting c...
Colour-magnitude diagrams, probabilistic synthesis models and the upper mass limit of the initial mass function
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2011/1/5
We present the underlying relations between colour-magnitude diagrams (CMDs) and synthesis models through the use of stellar luminosity distribution func- tions. CMDs studies make a direct use of the ...
The evolution of luminosity, colour and the mass-to-luminosity ratio of Galactic open clusters: comparison of discrete vs. continuous IMF models
Galaxy Astrophysics (astro-ph.GA)
2010/12/29
We found in previous studies that standard Simple Stellar Population (SSP) models are unable to describe or explain the colours of Galactic open clusters both in the visible and in the NIR spectral ra...
Colour and stellar population gradients in galaxies
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/24
We discuss the colour, age and metallicity gradients in a wide sample of local SDSS early- and late-type galaxies. From the fitting of stellar population models we find that metallicity is the main dr...
Comparison of the VIMOS-VLT Deep Survey with the Munich semi-analytical model - I. Magnitude counts, redshift distribution, colour bimodality, and galaxy clustering
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/23
This paper presents a detailed comparison between high-redshift observations from the VIMOS-VLT Deep Survey (VVDS) and predictions from the Munich semi-analytical model of galaxy formation.
MONITORING ACTIVE STARS 29 DRA,12 CAM AND COLOUR EXCESS OF II PEG
Stars late type-starspots-Stars individual 29 Dra, 12 Cam, II Peg
2009/2/11
We present the BV light curves analysis of late-type, long-period
stars 29 Dra, 12 Cam for the season 2005/2006, and shorter-period star II Peg for
the same season. High latitude spots (alternativel...