J/ApJ/559/606 Star formation in spectroscopic survey (Carter+, 2001)
Star formation in a complete spectroscopic survey of galaxies.
Carter B.J., Fabricant D.G., Geller M.J., Kurtz M.J., McLean B.
<Astrophys. J. 559, 606 (2001)>
=2001ApJ...559..606C 2001ApJ...559..606C
ADC_Keywords: Galaxy catalogs ; Redshifts
Keywords: galaxies: active - galaxies: distances and redshifts -
galaxies: fundamental parameters - galaxies: interactions -
galaxies: starburst
Abstract:
The 15R-North galaxy redshift survey is a uniform spectroscopic survey
(S/N∼10) covering the range 3650-7400Å for 3149 galaxies with
median redshift 0.05. The sample is 90% complete to R=15.4. The median
slit covering fraction is 24% of the galaxy, apparently sufficient to
minimize the effects of aperture bias on the EW(Hα). Forty-nine
percent of the galaxies in the survey have one or more emission lines
detected at ≥2σ. In agreement with previous surveys, the
fraction of absorption-line galaxies increases steeply with galaxy
luminosity. We use Hβ, [O III], Hα, and [N II] to
discriminate between star-forming galaxies and AGNs. At least 20% of
the galaxies are star-forming, at least 17% have AGN-like emission,
and 12% have unclassifiable emission.
The data for the entire survey will appear in Geller et al. 2002,
in preparation.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 41 32 The Most Vigorous Star-Forming Galaxies in
the 15R Sample
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (1950) (1)
4- 5 I2 min RAm Right ascension (1950)
7- 10 F4.1 s RAs Right ascension (1950)
12 A1 --- DE- Declination sign (1950)
13- 14 I2 deg DEd Declination (1950)
16- 17 I2 arcmin DEm Declination (1950)
19- 22 F4.1 arcsec DEs Declination (1950)
24 A1 --- Orient [ENSW] Orientation
26- 29 F4.1 --- b Scalo stellar birthrate parameter (2)
31- 35 I5 km/s cz Heliocentric redshift
37- 41 F5.1 0.1nm EW(Halpha) Hα equivalent width
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Note (1): Galaxies identified as [CFG2001] 15R HHMMSS.s+DDMMSS.s in Simbad
Note (2): Scalo stellar birthrate parameter:
b = SFR/ = [(SFR*taud)/Md]*(1-Rf), where
Md is the stellar mass,
taud is the age of the stellar population, and
Rf is the fraction of mass in each stellar generation that is not
tied up in stars (Tinsley, 1980, Fundam. Cosmic Phys., 5, 287)
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 24-Apr-2002