J/ApJ/914/127 Gaia-ASAS-SN classical Cepheid sample. I. (Inno+, 2021)
The Gaia-ASAS-SN classical Cepheid sample. I. Sample selection.
Inno L., Rix H.-W., Stanek K.Z., Jayasinghe T., Poggio E., Drimmel R.,
Rotundi A.
<Astrophys. J., 914, 127 (2021)>
=2021ApJ...914..127I 2021ApJ...914..127I
ADC_Keywords: Stars, variable; Milky Way; Photometry, UBV
Keywords: Cepheid variable stars ; Milky Way Galaxy
Abstract:
We present a well-defined and characterized all-sky sample of
classical Cepheids in the Milky Way, obtained by combining two
time-domain all-sky surveys: Gaia DR2 (Gaia Col. 2018; see I/345)
and All-Sky Automated Survey for Supernovae (ASAS-SN;
Shappee+ 2014AAS...22323603S 2014AAS...22323603S). We first use parallax and variability
information from Gaia to select ∼30000 bright (G<17) Cepheid
candidates with MK<-1. We then analyze their ASAS-SN V-band light
curves, determining periods and classifying the light curves using
their Fourier parameters. This results in ∼1900 likely Galactic
Cepheids, which we estimate to be ≳90% complete and pure within our
adopted selection criteria. This is the largest all-sky sample of
Milky Way Cepheids that has such a well-characterized selection
function, needed for population modeling and for systematic
spectroscopic follow-up foreseen with Sloan Digital Sky Survey-V.
About 130 of these potential Cepheids have not been documented in the
literature even as possible candidates.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 96 1891 Gaia DR2 ID and parameters from our analysis of
all Cepheids in the I21 sample
table5.dat 292 1891 Classification for the I21 Cepheids from
other catalogs; see Section 5
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
II/366 : ASAS-SN catalog of variable stars (Jayasinghe+, 2018-2020)
J/A+A/576/A30 : NIR LC templates for classical Cepheids (Inno+, 2015)
J/AJ/156/241 : Variable stars measured by ATLAS (Heinze+, 2018)
J/AcA/68/315 : OGLE Galactic Cepheids (Udalski+, 2018)
J/A+A/622/A60 : Gaia DR2 misclassified RR Lyrae list (Clementini+, 2019)
J/ApJ/883/58 : Cepheids from VVV in Gal. midplane (Dekany+, 2019)
J/MNRAS/482/3058 : New variable stars towards Galactic Bulge (Kains+, 2019)
J/A+A/625/A14 : Reclassification of Cepheids in Gaia DR2 (Ripepi+, 2019)
J/other/Sci/365.478 : Milky Way classical Cepheids sample (Skowron+, 2019)
J/ApJS/249/18 : The ZTF catalog of periodic variable stars (Chen+, 2020)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- Gaia Gaia DR2 source identifier
21- 27 F7.4 d PT [0.3/64.1] Period from template fitting procedure
29- 34 F6.3 d PF [0.3/64.1] Period from Lomb-Scargle (LS) method
36- 38 I3 --- N [46/786] Number of observing epochs
40- 45 F6.3 mag Vmag [7.1/17.3] Mean V band magnitude
47- 52 F6.4 --- A1 [0.007/0.6] Amplitude, A1
54- 59 F6.4 --- R21 [0.003/0.8] Ratio of 2nd to 1st Fourier amplitudes
61- 66 F6.4 --- R31 [0.003/0.5] Ratio of 3rd to 1st Fourier amplitudes
68- 73 F6.4 --- phi21 [0.009/6.3] Ratio of 2nd to 1st phase differences
75- 81 F7.4 --- phi31 [-6.2/6.3] Ratio of 3rd to 1st phase differences
83- 87 F5.3 mag DeltaG [0.06/2.8] Gaia G band variability
89- 93 F5.3 --- Ratio [1.1/1.9] Ratio of Gaia Blue to Red passband
variability
95- 96 A2 --- Mode Pulsation mode ("F"=1269 occurrences; or
"1O"=622 occurrences)
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- Gaia Gaia DR2 source identifier
21- 40 F20.16 deg RAdeg Right Ascension (ICRS) at Epoch=2015.5
42- 63 F22.18 deg DEdeg [-78.7/79.6] Declination (ICRS)
at Epoch=2015.5
65 I1 --- Cont [0/1] Possible contamination flag
(1=contaminated)
67- 84 A18 --- Lit Source of photometric data (1)
86-113 A28 --- ID Stellar identifier from literature
115-120 A6 --- ModeLit Pulsation mode
122-128 F7.4 d Per [0.37/51.42]? Pulsation period
130-141 A12 --- r_Per Reference for Per (1)
143-170 A28 --- ASAS-SN Non classified Cepheid in ASAS-SN name
172-182 F11.7 d PerA [0.35/136.1]? Non classified Cepheid
in ASAS-SN period
184-185 A2 --- f_PerA A Non-periodic flag on PerA
187-190 A4 --- TypeA Non classified Cepheid in ASAS-SN type
192-211 A20 --- OGLE Non classified Cepheid in OGLE name
213-217 A5 --- TypeO Non classified Cepheid in OGLE type
219-240 A22 --- ZTF Non classified Cepheid in ZTF name
242-246 A5 --- TypeZ Non classified Cepheid in ZTF type
248-268 F21.17 deg GLON Galactic longitude
270-292 F23.19 deg GLAT Galactic latitude
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Note (1): Reference as follows:
Chen19 = 2019A&A...632A.105C 2019A&A...632A.105C (41 occurrences)
Chen20 = 2020, J/ApJS/249/18 (91 occurrences)
I21 = This work (47 occurrences)
J18 = Jayasinghe+ 2018MNRAS.477.3145J 2018MNRAS.477.3145J ; see II/366 (35 occurrences)
J19 = Jayasinghe+ 2019MNRAS.485..961J 2019MNRAS.485..961J (3 occurrences)
R19 = Ripepi+ 2019, J/A+A/625/A14 (20 occurrences)
S19b = Skowron+ 2019AcA....69..305S 2019AcA....69..305S (1111 occurrences)
S20 = Soszynski+ 2020AcA....70..101S 2020AcA....70..101S (19 occurrences)
SIMBAD = http://simbad.cds.unistra.fr/simbad/ (2 occurrences)
VSX = AAVSO International Variable Star Index; see B/vsx (2 occurrences)
ASAS = (69 occurrences)
ASAS-SN = the All-Sky Automated Survey for Supernovae
(127 occurrences)
ATLAS = the Asteroid Terrestrial-impact Last Alert System
(99 occurrences)
GCVS = (502 occurrences)
Gaia = the Gaia Catalog of classical Cepheids, as recently
reclassified by Ripepi+ 2019, J/A+A/625/A14
(25 occurrences)
OGLE = OGLE Collection of Galactic Cepheids (19 occurrences)
OGLE-III = (8 occurrences)
OGLE-IV = (325 occurrences)
WISE = the WISE time-series data by Chen+ 2019NatAs...3..320C 2019NatAs...3..320C
(80 occurrences)
ZTF = the Zwicky Transient Facility,
Chen+ 2020, J/ApJS/249/18 (91 occurrences)
CHEN = (1 occurrence)
CSS = (1 occurrence)
EROS2-GSA = (2 occurrences)
GAIA = (2 occurrences)
Bajer2018 = (1 occurrence)
Benko+2007 = (5 occurrences)
Caron+2013 = (1 occurrence)
Ditkovsky2015 = (1 occurrence)
Kabath+2009 = (1 occurrence)
Khruslov+2016 = Khruslov & Kusakin 2016arXiv160501313K 2016arXiv160501313K (1 occurrence)
Lit = (3 occurrences)
Lohr+2018 = (1 occurrence)
Prokopovich+2011 = (1 occurrence)
Sergey+15 = (1 occurrence)
Shaw+2016 = (2 occurrences)
Tsehmeystrenko2013 = (1 occurrence)
Yoshida+2012 = (1 occurrence)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 13-Dec-2022