J/ApJ/604/521 Luminosities and masses of galaxies out to z∼3 (Trujillo+, 2004)
The luminosity-size and mass-size relations of galaxies out to z∼3.
Trujillo I., Rudnick G., Rix H.-W., Labbe I., Franx M., Daddi E.,
Van Dokkum P.G., Forster Schreiber N.M., Kuijken K., Moorwood A.,
Rottgering H., Van De Wel A., Van Der Werf P., Van Starkenburg L.
<Astrophys. J., 604, 521-533 (2004)>
=2004ApJ...604..521T 2004ApJ...604..521T
ADC_Keywords: Galaxies, IR ; Redshifts ; Photometry, infrared
Keywords: galaxies: evolution - galaxies: fundamental parameters -
galaxies: high-redshift - galaxies: structure - infrared: galaxies
Abstract:
The luminosity-size and mass-size distributions of galaxies out to z∼3
are presented. We use very deep near-infrared images of the Hubble
Deep Field-South in the Js, H, and Ks bands, taken as part of FIRES
at the VLT, to follow the evolution of the optical rest-frame sizes of
galaxies. For a total of 168 galaxies with Ks,AB ≤23.5, we find
that the rest-frame V-band sizes re,V of luminous galaxies
(<LV≳2x1010h-2L☉) at 2<z<3 are 3 times smaller than for
equally luminous galaxies today. In contrast, the mass-size relation
has evolved relatively little: the size at mass
<M*≳2x1010h-2M☉ has changed by 20% (±20%) since z∼2.5.
Both results can be reconciled by the fact that the stellar M/L ratio
is lower in the luminous high-z galaxies than in nearby ones because
they have young stellar populations. The lower incidence of large
galaxies at z∼3 seems to reflect the rarity of galaxies with high
stellar mass.
Description:
Ultradeep NIR images of the HDF-S were obtained as part of FIRES, and
the data processing and photometry are discussed in detail by Labbe et
al. (2003AJ....125.1107L 2003AJ....125.1107L). The catalog and reduced images are
available at http://www.strw.leidenuniv.nl/~fires
Objects:
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RA (2000) DE Designation(s)
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22 32 55.464 -60 33 05.01 HDF-S (pointing position)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 65 168 Properties of the sample galaxies
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See also:
http://www.strw.leidenuniv.nl/~fires : FIRES data
J/A+AS/145/111 : HDF-South catalogue of galaxies (Volonteri+, 2000)
J/AJ/122/2205 : HDF-South K photometric redshift catalog (Rudnick+, 2001)
J/AJ/125/1107 : Ultra-deep near-IR observation in HDF-S (Labbe+, 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- [LFR2003] Galaxy catalog identification number
(Labbe et al., J/AJ/125/1107)
7- 12 F6.1 pix Xpix HDF-S mosaic X pixel coordinate position
14- 19 F6.1 pix Ypix HDF-S mosaic Y pixel coordinate position
21- 25 F5.2 mag Ksmag The Ks band total magnitude
27- 30 F4.2 arcsec Rad Circularized rest frame half-light
radius (1)
32- 35 F4.2 --- Eps Recovered non-seeing affected ellipticity
37- 40 F4.2 10+10solLum LV Restframe V band luminosity (2)
42- 46 F5.2 10+10solMass Mass Mass (in solar masses times 1010/h2)
48- 52 F5.3 --- z Redshift
54 A1 --- n_z [a] Indicates a spectroscopic redshift
57- 62 A6 --- Filt Filter used used to measure galaxy size
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Note (1): The typical uncertainty on the size determination is 35%.
Note (2): In units of solar luminosities times 1010/h2.
The typical uncertainty on the luminosity determination is 30%.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 07-May-2004