The K20 survey. VII. The spectroscopic catalogue: spectral properties and evolution of the galaxy population

Details The K20 survey. VII. The spectroscopic catalogue: spectral properties and evolution of the galaxy population The K20 survey. VII. The spectroscopic catalogue: spectral properties and evolution of the galaxy population

2005-04-11

arxiv.org/abs/astro-ph/0504248v1

Astronomy and Astrophysics

Astrophysics

16 pages, 13 figures. Accepted for publication in Astronomy & Astrophysics. For the full spectroscopic catalogue, visit the K2

Scientific paper

10.1051/0004-6361:20042434

The K20 survey is a near infrared-selected, deep (Ks < 20) redshift survey targeting galaxies in two independent regions of the sky, the CDFS and the q0055-2659 field. The total Ks-selected sample includes 545 objects. Optical spectra for 525 of them have been obtained, providing 501 spectroscopic identifications (including 12 type-1 AGN and 45 stars). This paper describes the final K20 spectroscopic catalogue, along with the technique used to determine redshifts, measure the spectral features and characterize the spectra. The classification of the galaxy spectra has been performed according to a simple parametric recipe that uses the equivalent widths of the two main emission lines (O[II] and Halpha+[N II]) and two continuum indices (the 4000A break index, and a near-UV color index, C(28-39)). We defined three main spectroscopic classes: red early-type galaxies, blue emission-line galaxies and the intermediate galaxies, which show emission lines but a red continuum. More than 95% of the examined galaxies is included in one of these spectral types and a composite spectrum is built for each of the three galaxy classes. The blue emission-line and the early-type galaxies have been divided in redshift bins, and the corresponding composite spectra have been built, in order to investigate the evolution of the spectral properties of the K20 galaxies with redshift.

Affiliated with

Also associated with

No associations

Rating

The K20 survey. VII. The spectroscopic catalogue: spectral properties and evolution of the galaxy population does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The K20 survey. VII. The spectroscopic catalogue: spectral properties and evolution of the galaxy population, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The K20 survey. VII. The spectroscopic catalogue: spectral properties and evolution of the galaxy population will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-21631