J/AJ/165/148 Spectro. identified cataclysmic variables, LAMOST. II (Hou+, 2023)
Spectroscopically Identified Cataclysmic Variables from the LAMOST Survey.
II. Period Estimates.
Hou W., Luo A.-L., Dong Y.-Q., Chen X.-L., Bai Z.-R.
<Astron. J., 165, 148 (2023)>
=2023AJ....165..148H 2023AJ....165..148H
ADC_Keywords: Stars, variable; Spectra, optical; Photometry
Keywords: Cataclysmic variable stars ; Spectroscopy ; Photometry ; Period
determination
Abstract:
We examine a sample of 340 cataclysmic variables (CVs) from the latest
data release of the Large Sky Area Multi-Object Fiber Spectroscopic
Telescope (LAMOST) survey, along with 18 objects that are newly
classified as CVs. In this paper, we focus on investigating the
photometric behaviors of these CVs using data from time-domain
surveys. The orbital periods of three new and five previously known
objects are determined from the long-term light curves displaying
eclipses or ellipsoidal variations, and/or time-resolved spectra from
LAMOST. For another 16 CVs with measured periods, it is more reliable
to obtain consistent periods using light curves from different
surveys, as the periods derived from single-site data are still
questionable. Follow-up observations are needed to confirm whether the
periods have physical meanings or are orbital-related. In our sample,
we find that most of the objects have longer periods above the 2∼3hr
gap. Besides period estimates, we also carry out a separate detailed
analysis of some valuable CVs, in terms of spectral characteristics
and subtype determination. Finally, we discuss the observational
properties of this sample, including the distributions of orbital
periods, absolute magnitudes, and the statistical properties of each
subclass of CVs. In addition, we pick out six non-CV systems,
including five illumination-effect binaries, as well as one hot
subdwarf, that we came across when searching for CVs, and we
investigate their properties based on the spectra and photometric
data.
Description:
LAMOST DR9, low-resolution survey (LRS) started in 2011 October, and
it has been operating for 11yr, until the present. The wavelength
range covers the optical band from 3690 to 9100Å, and the
resolution is about 1800 at 5500Å.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 117 539 Cataclysmic variables catalog
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See also:
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
V/110 : Catalog of Cataclysmic Variables (Downes+ 2001)
V/123 : Catalog of Cataclysmic Variables (Downes+ 2001-2006)
V/146 : LAMOST DR1 catalogs (Luo+, 2015)
J/ApJ/696/870 : Catalina Real-time Transient Survey (CRTS) (Drake+, 2009)
J/AJ/142/181 : CVs from SDSS. VIII. The final year (Szkody+, 2011)
J/MNRAS/435/707 : Hα velocity curves of IM Eri (Armstrong+, 2013)
J/MNRAS/443/3174 : 72 faint CV candidates in CRTS (Breedt+, 2014)
J/MNRAS/441/1186 : Cataclysmic variables from CRTS (Drake+, 2014)
J/MNRAS/452/765 : White dwarf cand. using LAMOST DR3 (Gentile Fusillo+, 2015)
J/AJ/150/170 : Radial velocities of 7 cataclysmic binaries (Halpern+, 2015)
J/MNRAS/456/4441 : Outburst cat. of cataclysmic variables (Coppejans+, 2016)
J/ApJ/881/7 : Hot subdwarf stars from LAMOST DR5 & Gaia DR2 (Luo+, 2019)
J/MNRAS/492/L40 : Disentangling cataclysmic variables Gaia DR2 (Abril+, 2020)
J/AJ/159/43 : Spectro. identified CVs from LAMOST survey. I. (Hou+, 2020)
J/MNRAS/491/2217 : Study of spiral density waves in CVs (Ruiz-Carmona+, 2020)
J/AJ/159/198 : Cataclysmic variables in ZTF 1yr (2018-2019) (Szkody+, 2020)
J/AJ/160/151 : RVs of 5 cataclysmic variable candidates (Thorstensen, 2020)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 I9 --- ObsID [312121/911405175] LAMOST DR9 Observation ID
11- 29 A19 --- LAMOST LAMOST DR9 position-based designation
31- 41 F11.7 deg RAdeg [0.59/359] Right Ascension, LAMOST DR9 (J2000)
43- 52 F10.7 deg DEdeg [-8.51/67.9] Declination, LAMOST DR9 (J2000)
54- 56 I3 --- SNRg [0/547] Signal-to-noise, g-band extracted from
LAMOST Stellar Parameter Pipeline
58- 66 F9.6 mag BP-RP [-0.335058/2.699402]? Gaia DR2 BP-RP color
68- 72 F5.2 mag Gmag [11.5/21.1] Gaia DR2 mean G-band magnitude
74- 78 F5.2 mag GMAG [0.25/12.5]? Absolute Gaia G-band magnitude
Section 4.2
80- 90 F11.9 mag e_GMAG [0.009/5]? Uncertainty in MGMAG
92- 95 I4 pc Dist [79/4798]? Distance
97-105 A9 --- Type SubType
107-117 F11.9 d Per [0.01/6.43]? Orbital period
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History:
From electronic version of the journal
References:
Hou et al, Paper I : 2020AJ....159...43H 2020AJ....159...43H Cat. J/AJ/159/43
(End) Prepared by [AAS], Coralie Fix [CDS], 25-Aug-2023