J/AJ/130/2043 HST paired and isolated galaxies (Patton+, 2005)
A Hubble Space Telescope snapshot survey of dynamically close galaxy pairs in
the CNOC2 redshift survey.
Patton D.R., Grant J.K., Simard L., Pritchet C.J., Carlberg R.G.,
Borne K.D.
<Astron. J., 130, 2043-2057 (2005)>
=2005AJ....130.2043P 2005AJ....130.2043P
ADC_Keywords: Photometry, HST ; Equivalent widths ; Galaxy catalogs
Keywords: galaxies: evolution - galaxies: interactions - galaxies: structure -
surveys
Abstract:
We compare the structural properties of two classes of galaxies at
intermediate redshift: those in dynamically close galaxy pairs, and
those that are isolated. Both samples are selected from the Canadian
Network for Observational Cosmology field galaxy redshift survey
(CNOC2, Cat. J/ApJS/129/475) and have redshifts in the range
0.1<z<0.6. Hubble Space Telescope WFPC2 images were acquired as part
of a snapshot survey and were used to measure bulge fraction and
asymmetry for these galaxies.
Description:
WFPC2 snapshot observations for this program (proposal ID 8230; PI D.
Patton) were carried out between 1999 July and 2001 June.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 79 70 Catalog of paired galaxies
table3.dat 79 77 Catalog of isolated galaxies
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See also:
J/ApJS/129/475 : The CNOC2 survey. I. (Yee+, 2000)
J/ApJ/565/208 : Galaxy pairs in the CNOC2 Redshift Survey (Patton+, 2002)
Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- HST HST identification (1)
5- 15 A11 --- CNOC2 CNOC2 name (2)
17- 18 I2 h RAh Hour of Right Ascension (J2000)
20- 21 I2 min RAm Minute of Right Ascension (J2000)
23- 27 F5.2 s RAs Second of Right Ascension (J2000)
29 A1 --- DE- Sign of the Declination (J2000)
30- 31 I2 deg DEd Degree of Declination (J2000)
33- 34 I2 arcmin DEm Arcminute of Declination (J2000)
36- 39 F4.1 arcsec DEs Arcsecond of Declination (J2000)
41- 47 F7.5 --- z Spectroscopic redshift
49- 52 F4.1 mag Rcmag Apparent Cousins R band magnitude
54- 58 F5.1 mag RcMag Absolute Cousins R band magnitude
60- 63 F4.2 --- B/T Bulge fraction (3)
65- 68 F4.2 --- Asym Asymmetry (4)
70- 73 F4.2 mag (B-Rc)0 The rest frame (B-Rc) color index
75- 79 F5.1 0.1nm EW([OII]) ? [OII] (3727Å) equivalent width
in units of Angstroms
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Note (1): HST Target. In Simbad: [PGS2005] GinP NNA (table 2) and
[PGS2005] Isolated NN (table 3).
Note (2): Patch and serial number.
Note (3): A pure disk system has B/T=0, and a pure bulge system has B/T=1.
Note (4): Defined as RT-RA where the total and symmetric indices RT
and RA are defined in equation 11 of Simard (1998ASPC..145..108S 1998ASPC..145..108S),
and are the GIM2D versions of the parameters originally introduced by
Schade et al. (1995ApJ...451L...1S 1995ApJ...451L...1S). RT and RA are approximately
equal to the total and asymmetric residual flux respectively, and are
expressed as a fraction of the total galaxy flux.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 01-Mar-2006