J/ApJ/868/99 Identifying post-starburst galaxies from surveys (French+, 2018)
Identifying tidal disruption events via prior photometric selection of their
preferred hosts.
French K.D., Zabludoff A.I.
<Astrophys. J., 868, 99 (2018)>
=2018ApJ...868...99F 2018ApJ...868...99F
ADC_Keywords: Active gal. nuclei; Spectra, optical; Photometry, SDSS;
Galaxies, IR; Ultraviolet; Surveys
Keywords: galaxies: active ; galaxies: evolution ; methods: observational
Abstract:
A nuclear transient detected in a post-starburst galaxy or other
quiescent galaxy with strong Balmer absorption is likely to be a tidal
disruption event (TDE). Identifying such galaxies within the planned
survey footprint of the Large Synoptic Survey Telescope (LSST) before
a transient is detected will make TDE classification immediate and
follow-up more efficient. Unfortunately, spectra for identifying most
such galaxies are unavailable, and simple photometric selection is
ineffective; cutting on "green valley" UV/optical/IR colors produces
samples that are highly contaminated and incomplete. Here we propose a
new strategy using only photometric optical/UV/IR data from large
surveys. Applying a machine-learning random forest classifier to a
sample of ∼400000 SDSS galaxies with Galaxy Evolution Explorer (GALEX)
and Wide-field Infrared Survey Explorer (WISE) photometry, including
13592 quiescent Balmer-strong galaxies, we achieve 53%-61% purity and
8%-21% completeness, given the range in redshift. For the subset of
1299 post-starburst galaxies, we achieve 63%-73% purity and 5%-12%
completeness. Given these results, the range of likely TDE and
supernova rates, and that 36%-75% of TDEs occur in quiescent
Balmer-strong hosts, we estimate that 13%-99% of transients observed
in photometrically selected host galaxies will be TDEs and that we
will discover 119-248 TDEs per year with LSST. Using our technique, we
present a new catalog of 67484 candidate galaxies expected to have a
high TDE rate, drawn from the SDSS, Pan-STARRS, DES, and WISE
photometric surveys. This sample is 3.5x larger than the current SDSS
sample of similar galaxies, thereby providing a new path forward for
transient science and galaxy evolution studies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 151 19514 Spectroscopically-identified quiescent
Balmer-strong galaxies from SDSS parent training
and test samples
table2.dat 129 1683 Spectroscopically-identified post-starburst
galaxies from SDSS parent training and test samples
table5.dat 86 57299 Pan-STARRS+WISE newly-identified quiescent
Balmer-strong galaxies
table6.dat 77 9337 DES+WISE newly-identified quiescent Balmer-strong
galaxies
table7.dat 94 848 SDSS+WISE newly-identified quiescent Balmer-strong
galaxies
table8.dat 86 9690 Pan-STARRS+WISE newly-identified post-starburst
galaxies
table9.dat 77 753 DES+WISE newly-identified post-starburst galaxies
table10.dat 94 117 SDSS+WISE newly-identified post-starburst galaxies
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See also:
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
II/328 : AllWISE Data Release (Cutri+ 2013)
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)
II/335 : Revised catalog of GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017)
II/357 : The Dark Energy Survey (DES): Data Release 1 (Abbott+, 2018)
V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)
II/371 : The Dark Energy Survey (DES): Data Release 2 (Abbott+, 2021)
J/ApJS/173/293 : UV-Optical galaxy color-magnitude diagram I. (Wyder+, 2007)
J/ApJ/750/99 : The Pan-STARRS1 photometric system (Tonry+, 2012)
J/MNRAS/420/1684 : End of red sequence galaxies in Galaxy Zoo (Wong+, 2012)
J/ApJ/789/140 : SDSS quasars balmer emission lines (Liu+, 2014)
J/ApJ/793/38 : Palomar Transient Factory photometric obs. (Arcavi+, 2014)
J/A+A/584/A44 : Photometric classification of QSO from RCS-2 (Carrasco+, 2015)
J/MNRAS/463/3813 : ASASSN-15oi UBVI M2W1W2 light curves (Holoien+, 2016)
J/ApJ/833/19 : 0.02<z<1.4 post-starburst SDSS gal. (Pattarakijwanich+, 2016)
J/ApJ/844/46 : Photom. of the transient event iPTF16fnl (Blagorodnova+, 2017)
J/AJ/153/107 : Australian Dark Energy Survey (OzDES) quasar cat. (Tie+, 2017)
J/ApJ/862/2 : Post-starburst galaxy ages from SDSS (French+, 2018)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000)
13- 23 F11.7 deg DEdeg Declination in decimal degrees (J2000)
25- 43 I19 --- objid Object ID
45- 50 F6.2 0.1nm EWHa [-10.1/5] SDSS Hα EW in emission;
in Angstrom units
52- 55 F4.2 0.1nm HdA [1.3/9.2] SDSS Lick HδA index
in absorption; in Angstrom units
57- 61 F5.2 mag NUVmag [15.2/24]?=0 GALEX NUV AB magnitude
63- 70 F8.2 mag umag [14.7/27.1]?=-9999 SDSS modelMag_u; AB
72- 79 F8.2 mag gmag [13.1/25.3]?=-9999 SDSS modelMag_g; AB
81- 88 F8.2 mag rmag [12.4/24.9]?=-9999 SDSS modelMag_r; AB
90- 97 F8.2 mag imag [8.3/24.4]?=-9999 SDSS modelMag_i; AB
99-106 F8.2 mag zmag [11.7/23.4]?=-9999 SDSS modelMag_z; AB
108-112 F5.2 mag W1mag [12.8/19.7]?=0 WISE W1mpro; AB
114-118 F5.2 mag W2mag [13.3/20.4]?=0 WISE W2mpro; AB
120-127 F8.2 mag W3mag [12/10004]?=0 WISE W3mpro; AB
129-133 F5.2 mag W4mag [9.2/16.9]?=0 WISE W4mpro; AB
135-142 F8.2 mag NUVcmag [17.3/25.7]?=0 GALEX magd3p0nuv (AB)
central 3 arcsec NUV magnitude (1)
144-151 F8.5 mag ucmag [17.8/29.5]?=99 SDSS fiberMag_u (AB)
central 3 arcsec u magnitude (1)
--------------------------------------------------------------------------------
Note (1): Note that if NUVcmag and ucmag are both filled, there is an inversion
between the two values in this table; note added by CDS.
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Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000)
13- 23 F11.7 deg DEdeg Declination in decimal degrees (J2000)
25- 43 I19 --- objid Object ID
45- 49 F5.2 0.1nm EWHa [-5.5/3] SDSS Hα EW in emission;
in Angstrom units
51- 54 F4.2 0.1nm HdA [4/9.2] SDSS Lick HδA index
in absorption; in Angstrom units
56- 60 F5.2 mag NUVmag [16.4/23.8]?=0 GALEX NUV AB magnitude
62- 66 F5.2 mag umag [15.6/27.1] SDSS modelMag_u; AB
68- 72 F5.2 mag gmag [14/25.2] SDSS modelMag_g; AB
74- 78 F5.2 mag rmag [13.3/23] SDSS modelMag_r; AB
80- 84 F5.2 mag imag [13/24.4] SDSS modelMag_i; AB
86- 90 F5.2 mag zmag [12.7/22.9] SDSS modelMag_z; AB
92- 96 F5.2 mag W1mag [13.6/19.2]?=0 WISE W1mpro; AB
98-102 F5.2 mag W2mag [14.1/19.6]?=0 WISE W2mpro; AB
104-108 F5.2 mag W3mag [12.1/18.6]?=0 WISE W3mpro; AB
110-114 F5.2 mag W4mag [9.2/16.8]?=0 WISE W4mpro; AB
116-120 F5.2 mag NUVcmag [20.9/27.2]?=0 GALEX magd3p0nuv; AB
central 3 arcsec NUV magnitude
122-129 F8.5 mag ucmag [17.7/23.2] SDSS fiberMag_u; AB
central 3 arcsec u magnitude
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000)
13- 23 F11.7 deg DEdeg Declination in decimal degrees (J2000)
25- 42 I18 --- objid objID
44- 48 F5.2 mag gmag [11.5/23.3] Pan-STARRS gMeanKronMag; AB
50- 54 F5.2 mag rmag [11.7/22.2] Pan-STARRS rMeanKronMag; AB
56- 60 F5.2 mag imag [11.8/22] Pan-STARRS iMeanKronMag; AB
62- 66 F5.2 mag zmag [11.9/21.5] Pan-STARRS zMeanKronMag; AB
68- 73 F6.3 mag W1mag [9.4/21.5] WISE W1 AB magnitude
75- 80 F6.3 mag W2mag [9/21.7] WISE W2 AB magnitude
82- 86 F5.2 mag W3mag [8.6/19.1]? WISE W3 AB magnitude (1)
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Note (1): A blank value indicates a 'nan' value.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000)
12- 21 F10.6 deg DEdeg Declination in decimal degrees (J2000)
23- 32 I10 --- objid [61442049/618661474] coaddobjectid
34- 38 F5.2 mag gmag [13.7/25.1]?=99 DES magautog; AB
40- 44 F5.2 mag rmag [13.1/24]?=99 DES magautor; AB
46- 50 F5.2 mag imag [12.8/22.9] DES magautoi; AB
52- 56 F5.2 mag zmag [12.5/22.7]?=99 DES magautoz; AB
58- 62 F5.2 mag W1mag [13.6/21.1] WISE W1mpro; AB
64- 68 F5.2 mag W2mag [13.8/21.3] WISE W2mpro; AB
70- 77 F8.5 mag W3mag [11.6/18.6] WISE W3mpro; AB
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000)
13- 23 F11.7 deg DEdeg Declination in decimal degrees (J2000)
25- 43 I19 --- objid objid
45- 49 F5.2 mag umag [19.7/22] SDSS modelMag_u; AB
51- 55 F5.2 mag gmag [18.2/24.1] SDSS modelMag_g; AB
57- 61 F5.2 mag rmag [17.5/19.6] SDSS modelMag_r; AB
63- 67 F5.2 mag imag [17.2/20.1] SDSS modelMag_i; AB
69- 73 F5.2 mag zmag [16.9/19.7] SDSS modelMag_z; AB
75- 79 F5.2 mag W1mag [16.2/19.2] WISE W1mpro; AB
81- 85 F5.2 mag W2mag [17/19.5] WISE W2mpro; AB
87- 94 F8.5 mag W3mag [16.4/18.9] WISE W3mpro; AB
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table8.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000)
13- 23 F11.7 deg DEdeg Declination in decimal degrees (J2000)
25- 42 I18 --- objid objID
44- 48 F5.2 mag gmag [13.1/22.9] Pan-STARRS gMeanKronMag; AB
50- 54 F5.2 mag rmag [13/22.2] Pan-STARRS rMeanKronMag; AB
56- 60 F5.2 mag imag [12.7/22] Pan-STARRS iMeanKronMag; AB
62- 66 F5.2 mag zmag [12.4/21.3] Pan-STARRS zMeanKronMag; AB
68- 73 F6.3 mag W1mag [8.4/21.5] WISE W1 AB magnitude
75- 80 F6.3 mag W2mag [9.6/21.5] WISE W2 AB magnitude
82- 86 F5.2 mag W3mag [10.1/18.9]? WISE W3 AB magnitude (1)
--------------------------------------------------------------------------------
Note (1): A blank value indicates a 'nan' value.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table9.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000)
12- 21 F10.6 deg DEdeg Declination in decimal degrees (J2000)
23- 32 I10 --- objid [62100991/618467403] coaddobjectid
34- 38 F5.2 mag gmag [15.2/24.9] DES magautog; AB
40- 44 F5.2 mag rmag [14.5/23.2] DES magautor; AB
46- 50 F5.2 mag imag [14.2/22.2] DES magautoi; AB
52- 56 F5.2 mag zmag [14/21.8] DES magautoz; AB
58- 62 F5.2 mag W1mag [14.3/20.2] WISE W1mpro; AB
64- 68 F5.2 mag W2mag [13.8/21] WISE W2mpro; AB
70- 77 F8.5 mag W3mag [11.6/18.4] WISE W3mpro; AB
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table10.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000)
13- 23 F11.7 deg DEdeg Declination in decimal degrees (J2000)
25- 43 I19 --- objid objid
45- 49 F5.2 mag umag [19.9/21.9] SDSS modelMag_u; AB
51- 55 F5.2 mag gmag [18.3/20.3] SDSS modelMag_g; AB
57- 61 F5.2 mag rmag [17.6/19.4] SDSS modelMag_r; AB
63- 67 F5.2 mag imag [17.2/19.1] SDSS modelMag_i; AB
69- 73 F5.2 mag zmag [17/18.9] SDSS modelMag_z; AB
75- 79 F5.2 mag W1mag [17.1/19] WISE W1mpro; AB
81- 85 F5.2 mag W2mag [17.3/19.4] WISE W2mpro; AB
87- 94 F8.5 mag W3mag [16.7/18.6] WISE W3mpro; AB
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 22-Oct-2019