J/AJ/131/2018 Galaxies with large velocity dispersions (Bernardi+, 2006)
A search for the most massive galaxies: double trouble?
Bernardi M., Sheth R.K., Nichol R.C., Miller C.J., Schlegel D., Frieman J.,
Schneider D.P., Subbarao M., York D.G., Brinkmann J.
<Astron. J., 131, 2018-2034 (2006)>
=2006AJ....131.2018B 2006AJ....131.2018B
ADC_Keywords: Galaxies, spectra ; Redshifts ; Velocity dispersion
Keywords: galaxies: elliptical and lenticular, cD - galaxies: evolution -
galaxies: fundamental parameters - galaxies: photometry -
galaxies: stellar content
Abstract:
We describe the results of a search for galaxies with large
(350≥km/s) velocity dispersions. The largest systems we have found
appear to be the extremes of the early-type galaxy population:
compared to other galaxies with similar luminosities, they have
the largest velocity dispersions and the smallest sizes.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 86 57 Physical parameters and median errors of the
objects in our sample that are not obvious
superpositions
table2.dat 66 48 *Physical parameters of the objects in our sample
that are almost certainly superpositions
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Note on table2.dat: For these objects, the measured parameters of the blend
are almost certainly not those of the individual components, so the
measurement errors are not reported.
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See also:
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [SDSS]
6- 23 A18 --- SDSS SDSS name (JHHMMSS.s+DDMMSS.s)
25- 31 F7.5 --- z Redshift
33- 38 F6.2 mag rMAG Absolute r band magnitude
40- 43 F4.2 mag e_rMAG Error in rMAG
45- 48 F4.2 mag g-r Rest-frame model g-r color index
50- 53 F4.2 mag e_g-r Error in g-r
55- 58 F4.2 [kpc] logR r-band size
60- 63 F4.2 [kpc] e_logR Error in logR
65- 67 I3 km/s sigma Aperture-corrected velocity dispersion
69- 70 I2 km/s e_sigma Error in sigma
72- 76 F5.3 mag Mg2 ? Mg2 line strength
78- 82 F5.3 mag e_Mg2 ? Error in Mg2
84- 85 I2 --- S/N Signal-to-noise ratio (1)
86 A1 --- f_S/N [*] Indicates objects for which evidence for
superposition is the weakest
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Note (1): Estimates of Mg2 were only made if S/N≥18.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [SDSS]
6- 23 A18 --- SDSS SDSS name (JHHMMSS.s+DDMMSS.s)
25- 31 F7.5 --- z Spectroscopic redshift
33- 38 F6.2 mag rMAG Absolute r band magnitude
40- 43 F4.2 mag g-r g-r color index
45- 48 F4.2 [kpc] logR r-band size
50- 53 I4 km/s Delcz ? Line of sight separation between the two
components
55- 57 I3 km/s sigma Aperture-corrected velocity dispersion
59- 63 F5.3 mag Mg2 ? Mg2 line strength
65- 66 I2 --- S/N Signal-to-noise ratio
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History:
From electronic version of the journal
(End) Marianne Brouty [CDS] 07-Mar-2007