J/ApJ/833/19 0.02<z<1.4 post-starburst SDSS galaxies (Pattarakijwanich+, 2016)
The evolution of post-starburst galaxies from z∼1 to the present.
Pattarakijwanich P., Strauss M.A., Ho S., Ross N.P.
<Astrophys. J., 833, 19-19 (2016)>
=2016ApJ...833...19P 2016ApJ...833...19P (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, spectra ; Redshifts ; Equivalent widths
Keywords: galaxies: distances and redshifts; galaxies: evolution;
galaxies: high-redshift; galaxies: luminosity function, mass function;
galaxies: starburst
Abstract:
Post-starburst galaxies are in the transitional stage between blue,
star-forming galaxies and red, quiescent galaxies and therefore hold
important clues for our understanding of galaxy evolution. In this
paper, we systematically searched for and identified a large sample of
post-starburst galaxies from the spectroscopic data set of the Sloan
Digital Sky Survey (SDSS) Data Release 9. In total, we found more than
6000 objects with redshifts between z∼0.05 and z∼1.3, making this the
largest sample of post-starburst galaxies in the literature. We
calculated the luminosity function of the post-starburst galaxies
using two uniformly selected subsamples: the SDSS main galaxy sample
and the Baryon Oscillation Spectroscopic Survey CMASS sample. The
luminosity functions are reasonably fit by half-Gaussian functions.
The peak magnitudes shift as a function of redshift from M~-23.5 at
z∼0.8 to M~-20.3 at z∼0.1. This is consistent with the downsizing
trend, whereby more massive galaxies form earlier than low-mass
galaxies. We compared the mass of the post-starburst stellar
population found in our sample to the decline of the global star
formation rate and found that only a small amount (∼1%) of all star
formation quenching in the redshift range z=0.2-0.7 results in
post-starburst galaxies in the luminosity range our sample is
sensitive to. Therefore, luminous post-starburst galaxies are not the
place where most of the decline in the star formation rate of the
universe is happening.
Description:
In this work we based our study on all available spectra in SDSS-I/II
and BOSS spectra in SDSS-III up to Data Release 9 of the survey (SDSS
DR9; Ahn et al. 2012, see V/139).
The selection of post-starburst galaxies yields 2330 galaxies from the
SDSS DR7 data set and 3964 galaxies from the BOSS data set.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 87 6294 Full list of post-starburst galaxies
--------------------------------------------------------------------------------
See also:
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
J/MNRAS/440/1880 : Eigenvectors for galaxy SED classification (Wild+, 2014)
J/MNRAS/360/587 : K-band imaging of Hδ-strong galaxies (Balogh+, 2005)
J/PASJ/55/771 : Hdelta-strong galaxies in SDSS (Goto+, 2003)
http://www.sdss3.org/ : SDSS-III home page
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- Survey [SDSS,BOSS] Survey subsample
6- 14 F9.5 deg RAdeg Right ascension, decimal degrees (J2000)
16- 24 F9.5 deg DEdeg Declination, decimal degrees (J2000)
26- 29 I4 --- Plate Plate, SDSS spectroscopy (1)
31- 34 I4 --- Fiber Fiber, SDSS spectroscopy (1)
36- 40 I5 --- MJD Modified Julian Date, SDSS spectroscopy (1)
42- 46 F5.3 --- z [0.02/1.4] Redshift determined from our
selection method
48- 53 F6.2 0.1nm EWHd [4/111] Equivalent Width, Hδ
55- 61 F7.2 0.1nm EWOII [-3/7558] Equivalent Width, [OII]λ3727
63- 66 F4.2 --- A/T [0.2/8] A/Total ratio from template fit (2)
68- 81 I14 --- Bitmask Selection bitmask (3)
83- 87 A5 --- pFit [True ,False] Pipeline to fit redshift match (4)
--------------------------------------------------------------------------------
Note (1): SDSS/BOSS Plate+Fiber+MJD provide a unique observation identifier.
Note (2): We introduce a parameter, A/Total, defined as A/(K+A+P) where K, A,
and P are the integrated fluxes in the wavelength range 4150-4300Å
of the "K," "A," and polynomial components of the model fit described
in section 3.2.2.
Note (3): The selection bitmask can be decoded using information available
on the SDSS website http://www.sdss3.org/dr10/algorithms/bitmask
legacy target1.php for SDSS I/II objects, and
http://www.sdss3.org/dr10/algorithms/bitmask boss target1.php
for BOSS objects.
Note (4): Pipeline indicates whether the pipeline redshift from Bolton+
(2012AJ....144..144B 2012AJ....144..144B) agrees with the fit redshift.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 17-Mar-2017