J/ApJ/928/192 A list of GAMA 0.1<z<0.35 quasar targets (Wethers+, 2022)
Galaxy and Mass Assembly (GAMA): the weak environmental dependence of quasar
activity at 0.1<z<0.35.
Wethers C.F., Acharya N., De Propris R., Kotilainen J., Baldry I.K.,
Brough S., Driver S.P., Graham A.W., Holwerda B.W., Hopkins A.M.,
Lopez-Sanchez A.R., Loveday J., Phillipps S., Pimbblet K.A., Taylor E.,
Wang L., Wright A.H.
<Astrophys. J., 928, 192 (2022)>
=2022ApJ...928..192W 2022ApJ...928..192W
ADC_Keywords: QSOs; Redshifts; Spectra, optical
Keywords: Quasars ; Galaxy evolution ; Active galaxies
Abstract:
Understanding the connection between nuclear activity and galaxy
environment remains critical in constraining models of galaxy
evolution. By exploiting the extensive cataloged data from the Galaxy
and Mass Assembly survey, we identify a representative sample of
205 quasars at 0.1<z<0.35 and establish a comparison sample of
galaxies, closely matched to the quasar sample in terms of both
stellar mass and redshift. On scales <1 Mpc, the galaxy number counts
and group membership of quasars appear entirely consistent with those
of the matched galaxy sample. Despite this, we find that quasars are
∼1.5 times more likely to be classified as the group center,
indicating a potential link between quasar activity and cold gas flows
or galaxy interactions associated with rich group environments. On
scales of ∼a few Mpc, the clustering strengths of both samples are
statistically consistent, and beyond 10 Mpc, we find no evidence that
quasars trace large-scale structures any more than the galaxy control
sample. Both populations are found to prefer intermediate- density
sheets and filaments to either very high-density environments or very
low-density environments. This weak dependence of quasar activity on
galaxy environment supports a paradigm in which quasars represent a
phase in the lifetime of all massive galaxies and in which secular
processes and a group-centric location are the dominant triggers of
quasars at low redshift.
Description:
Throughout this paper, we make use of proprietary data from the latest
internal data release of the Galaxy and Mass Assembly (GAMA) survey.
GAMA is a wide-field spectroscopic survey, observing some ∼300k
galaxies using the 2dF multifiber instrument in combination with the
AAOmega spectrograph on the Anglo-Australian Telescope (AAT). The full
GAMA survey, carried out between 2008 February and 2014 September,
covers ∼286deg2 of the southern sky over five fields, each covering
∼60deg2. In this work, we consider only the three equatorial survey
regions (G09, G12, and G15), over which the survey is most complete
(>98% to mr=19.8) and for which the most extensive ancillary data is
available.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 30 205 List of the 205 GAMA quasar targets used in the study
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See also:
VII/250 : The 2dF Galaxy Redshift Survey (2dFGRS) (2dFGRS Team, 1998-2003)
VII/241 : The 2dF QSO Redshift Survey (Croom+ 2004)
J/ApJS/143/315 : IRAS 1Jy sample of ultraluminous gal. II. (Veilleux+, 2002)
J/AJ/131/1 : Binary quasars in the SDSS (Hennawi+, 2006)
J/MNRAS/380/1467 : AGN in supercluster A901/2 (Gilmour+, 2007)
J/MNRAS/379/867 : BCG C4 cluster catalog (von der Linden+, 2007)
J/ApJ/778/98 : Cross-correlation of SDSS QSOs & BOSS galaxies (Shen+, 2013)
J/MNRAS/441/1802 : Low-redshift QSOs in SDSS Stripe 82 (Karhunen+, 2014)
J/MNRAS/452/2087 : Galaxy And Mass Assembly (GAMA): DR2 (Liske+, 2015)
J/MNRAS/474/3875 : Galaxy And Mass Assembly (GAMA): DR3 (Baldry+, 2018)
J/A+A/614/A140 : Large Quasar Astrometric Catalog 4, LQAC-4 (Gattano+, 2018)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- GAMA [7454/767417] Catalog identifier
8- 15 F8.4 deg RAdeg [130/224] Right Ascension (J2000)
17- 23 F7.4 deg DEdeg [-2/3] Declination in decimal degrees (J2000)
25- 30 F6.4 --- z [0.1/0.35] Spectroscopic redshift
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 04-Mar-2024