J/ApJS/249/31 Short period spec. & EBs (LPSEB) from LAMOST & PTF (Yang+, 2020)
A catalog of short period spectroscopic and eclipsing binaries identified from
the LAMOST and PTF surveys.
Yang F., Long R.J., Shan S.-S., Zhang Bo, Guo R., Bai Yu, Bai Z., Cui K.-M.,
Wang S., Liu J.-F.
<Astrophys. J. Suppl. Ser., 249, 31 (2020)>
=2020ApJS..249...31Y 2020ApJS..249...31Y
ADC_Keywords: Binaries, eclipsing; Binaries, spectroscopic; Radial velocities;
Spectra, optical
Keywords: Eclipsing binary stars; Close binary stars;
Spectroscopic binary stars; Binary stars; Detached binary stars;
Contact binary stars
Abstract:
Binaries play key roles in determining stellar parameters and
exploring stellar evolution models. We build a catalog of 88 eclipsing
binaries with spectroscopic information, taking advantage of
observations from both the Large Sky Area Multi-Object fiber
Spectroscopic Telescope (LAMOST) and the Palomar Transient Factory
(PTF) surveys. A software pipeline is constructed to identify binary
candidates by examining their light curves. The orbital periods of
binaries are derived from the Lomb-Scargle method. The key
distinguishing features of eclipsing binaries are recognized by a new
filter, Flat Test. We classify the eclipsing binaries by applying a
Fourier analysis on the light curves. Among all the binary stars, 13
binaries are identified as eclipsing binaries for the first time. The
catalog contains the following information: the position, primary
eclipsing magnitude and time, eclipsing depth, the number of
photometry and radial velocity observations, largest radial velocity
difference, binary type, the effective temperature of the observable
star Teff, and surface gravity of the observable star logg. The
false-positive probability is calculated by using both a Monte Carlo
simulation and real data from the Sloan Digital Sky Survey Stripe 82
Standard Catalog. The binaries in the catalog are mostly with a period
of less than one day. The period distribution shows a 0.22 day cutoff,
which is consistent with the low probability of an eclipsing binary
rotating with such a period.
Description:
The Large Sky Area Multi-Object fiber Spectroscopic Telescope (LAMOST)
employs the Guo Shou Jing Telescope, which is a 4 meter aperture
Schmidt telescope with a 20 square degree field of view. Taking 4000
spectra per exposure, the limiting magnitude is r=17.8 at a resolution
of R∼1800.
We chose sources with multi-epoch observations in LAMOST Spectroscopic
Survey of the Galactic Anticenter (LSS-GAC DR4,
Xiang+ 2017MNRAS.467.1890X 2017MNRAS.467.1890X), requiring ΔRVmax (the difference
between the highest and smallest radial velocity values of the same
component of a given target) to be two times larger than the largest
radial velocity error. This procedure helped us select 128,833 objects
with 421,436 observations.
The Palomar Transient Factory (PTF) employs an 8 square degree camera
installed on the 48 inch Samuel Oschin telescope. A 60-inch telescope
is used for following-up observations. The survey aims at time-domain
events with cadences from 90s to a few days. The PTF collaboration
released more than 8 billion light curve tables prior to 2016 Sept 1.
The sources selected from the LAMOST data were matched to the PTF
light-curve database. In both in the g' and R bands, 39,179 stars with
2,784,673 observation frames, requiring the goodflag=1, were
retrieved. We analyzed these sources in our binary systems
identification pipeline.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 81 88 LAMOST & PTF Spectroscopic and Eclipsing
Binaries (LPSEB) catalog
table2.dat 31 247 RV observations
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See also:
B/sb9 : SB9: 9th Catalog of Spectroscopic Binary Orbits (Pourbaix+ 2004-2014)
B/gcvs : General Catalog of Variable Stars (Samus+, 2007-2017)
V/153 : LAMOST DR4 catalogs (Luo+, 2018)
J/A+AS/109/447 : Eclipsing binaries EROS catalogue (Grison+, 1995)
J/AcA/48/563 : BVI phot. of OGLE SMC eclipsing binaries (Udalski+, 1998)
J/AcA/54/1 : OGLE II SMC eclipsing binaries (Wyrzykowski+, 2004)
J/ApJS/162/207 : Radial velocities of solar-type stars (Abt+, 2006)
J/ApJ/652/313 : BV phot. of a detached EB in M33 (Bonanos+, 2006)
J/AJ/134/973 : SDSS Stripe 82 star catalogs (Ivezic+, 2007)
J/AJ/140/184 : RAVE double-lined spectroscopic binaries (Matijevic+, 2010)
J/ApJS/190/1 : A survey of stellar families (Raghavan+, 2010)
J/AJ/141/83 : Kepler Mission. I. Eclipsing binaries in DR1 (Prsa+, 2011)
J/A+A/570/A107 : WDMS from LAMOST DR1 (Ren+, 2014)
J/AcA/65/39 : OGLE Gal. Bulge ultra-short-period bin. (Soszynski+, 2015)
J/MNRAS/448/822 : LAMOST candidate members of star clusters (Xiang+, 2015)
J/AcA/66/405 : Gal. bulge eclipsing & ellipsoidal bin. (Soszynski+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- ID Identifier
9 A1 --- f_ID [n] n: newly identified eclipsing binaries
11- 17 F7.3 deg RAdeg Right Ascension in decimal degrees (J2000)
19- 24 F6.3 deg DEdeg Declination in decimal degrees (J2000)
26- 30 F5.2 mag Maxmag [12.15/16.5] Primary eclipsing magnitude
32- 43 F12.6 d MJD [54903.4/56903.5] Modified Julian Date
of primary eclipsing mid-day
45- 48 F4.2 mag Depth [0.09/1.07] Eclipse depth
50- 53 F4.2 d Period [0.22/1.14] Orbital period
55- 57 I3 --- Nph [29/937] Number of photometric observations
59- 61 I3 km/s DelRV [0/201] Difference between largest and
smallest RV values
63- 64 I2 --- Nsp [1/15] Number of spectral observations
66- 68 A3 --- Type Binary type ("EC": contact; or
"ESD": semi-detached (63 occurrences) binaries)
70- 70 I1 --- Band [1/2] Observational band code (1=g' or 2=R)
72- 77 F6.1 K Teff [4286.3/7781.1] Effective temperature
of observable star
79- 81 F3.1 [cm/s2] log(g) [2.1/4.8] Surface gravity of observable star
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- ID Identifier
9- 22 F14.6 d JD Julian Date
24 A1 --- f_JD [f] Flag on JD (1)
26- 31 F6.1 km/s RVel [-198.3/123.6] Radial velocity
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Note (1):
f = Taken from LAMOST data release 7 (http://dr7.lamost.org/v1/search)
when not presented in LSS-GAC.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 26-Oct-2020