Access to Astronomical Catalogues

← Click to display the menu
J/ApJ/519/1    Lyman-break galaxies at z ≳ 4          (Steidel+, 1999)

Lyman-break galaxies at z ≳ 4 and the evolution of the ultraviolet luminosity density at high redshift Steidel C.C., Adelberger K.L., Giavalisco M., Dickinson M., Pettini M. <Astrophys. J. 519, 1 (1999)> =1999ApJ...519....1S
ADC_Keywords: Photometry ; Redshifts ; Spectroscopy Keywords: catalogs - galaxies: distances and redshifts - galaxies: evolution - galaxies: statistics - galaxies: stellar content Abstract: We present initial results of a survey for star-forming galaxies in the redshift range 3.8≲z≲4.5. This sample consists of a photometric catalog of 244 galaxies culled from a total solid angle of 0.23 deg2 to an apparent magnitude of IAB=25.0. Spectroscopic redshifts in the range 3.61≲z≲4.81 have been obtained for 48 of these galaxies; their median redshift is <z≥4.13. Selecting these galaxies in a manner entirely analogous to our large survey for Lyman-break galaxies at smaller redshift (2.7≲z≲3.4) allows a relatively clean differential comparison between the populations and integrated luminosity density at these two cosmic epochs. Over the same range of UV luminosity, the spectroscopic properties of the galaxy samples at z∼4 and z∼3 are indistinguishable, as are the luminosity function shapes and the total integrated UV luminosity densities [ρUV(z=3)/ρUV(z=4)=1.1{+/_}0.3]. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 68 11 z≥4 Lyman-break galaxy fields table2.dat 73 73 Lyman-break candidate spectroscopic results
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 12 A12 --- Field Field name 15- 16 I2 h RAh ? Right Ascension (J2000) 18- 19 I2 min RAm ? Right Ascension (J2000) 21- 24 F4.1 s RAs ? Right Ascension (J2000) 27 A1 --- DE- ? Declination (J2000) 28- 29 I2 deg DEd ? Declination (J2000) 31- 32 I2 arcmin DEm ? Declination (J2000) 34- 35 I2 arcsec DEs ? Declination (J2000) 37- 39 I3 arcsec-2 Area Field Area 42- 44 I3 --- NCand Number of candidates 47- 49 I3 --- AfterN Number of candidates after applying the (R-I)≤0.6 and I≥2 3 criteria 52- 53 I2 --- SpecZ Number of spectroscopic redshifts of z∼4 galaxies 56- 57 I2 --- AfterS Number of spectroscopic redshifts after application of addition color and magnitude criteria 60- 61 I2 --- Inter Number of interloper galaxies (z≪4) 64- 65 I2 --- AfterI Number of interloper galaxies after applied criteria 68 A1 --- f_Field [t] Indicates row contains the totals for all fields (no position for the totals)
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 16 A16 --- Name Object name (see table1.dat for field names) 19- 20 I2 h RAh Right Ascension (J2000) 22- 23 I2 min RAm Right Ascension (J2000) 25- 29 F5.2 s RAs Right Ascension (J2000) 32 A1 --- DE- Declination (J2000) 33- 34 I2 deg DEd Declination (J2000) 36- 37 I2 arcmin DEm Declination (J2000) 39- 42 F4.1 arcsec DEs Declination (J2000) 46- 50 F5.2 mag Imag I band magnitude in the AB system of Oke+ (1983ApJ...266..713O) 54- 58 F5.2 mag R-I (R-I) color in the AB system 60 A1 --- l_G-R limit flay on R-I 61- 64 F4.2 mag G-R (G-R) color in the AB system 66- 70 F5.3 --- z Redshift 73 A1 --- n_Name [ci] Type of galaxy (1)
Note (1): c = spectroscopically confirmed z ≥ 4 galaxy i = interloper galaxy
History: From ApJ electronic edition References: Oke, J. B., & Gunn, J. E. 1983, ApJ, 266, 713 (1983ApJ...266..713O)
(End) Greg Schwarz [AAS] 08-Mar-2000
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service