The evolution of the scatter of the cosmic average color-magnitude relation: Demonstrating consistency with the ongoing formation of elliptical galaxies

We present first measurements of the evolution of the scatter of the cosmic average early-type galaxy color-magnitude relation (CMR) from z=1 to the present day, finding that it is consistent with models in which galaxies are constantly being added to the red sequence through truncation of star form...

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Veröffentlicht in:	arXiv.org 2009-01
Hauptverfasser:	Ruhland, Christine, Bell, Eric F, Haeussler, Boris, Taylor, Edward N, Barden, Marco, McIntosh, Daniel H
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomical models Color Density Dependence Elliptical galaxies Galactic evolution Physics - Astrophysics of Galaxies Physics - Cosmology and Nongalactic Astrophysics Scattering Sky surveys (astronomy) Spheroids Star & galaxy formation Star formation Stars & galaxies
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Beschreibung
Zusammenfassung:	We present first measurements of the evolution of the scatter of the cosmic average early-type galaxy color-magnitude relation (CMR) from z=1 to the present day, finding that it is consistent with models in which galaxies are constantly being added to the red sequence through truncation of star formation in blue cloud galaxies. We used a sample of over 700 red sequence, structurally-selected early-type galaxies (defined to have Sersic index >2.5) with redshifts 0
ISSN:	2331-8422
DOI:	10.48550/arxiv.0901.4340