J/other/RAA/18.68 Cataclysmic variables from LAMOST DR3 (Han+, 2018)
Cataclysmic variables based on the stellar spectral survey LAMOST DR3.
Han X.L., Zhang L.-Y., Shi J.-R., Pi Q.-F., Lu H.-P., Zhao L.-B.,
Terheide R.K., Jiang L.-Y.
<Res. Astron. Astrophys., 18, 68 (2018)>
=2018RAA....18...68H 2018RAA....18...68H (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Binaries, cataclysmic ; Photometry, SDSS
Keywords: stars: cataclysmic variables - stars: spectroscopic - stars: variable
Abstract:
Big data in the form of stellar spectra from the spectroscopic survey
associated with the Large Sky Area Multi-object Fiber Spectroscopic
Telescope (LAMOST) are important for studying properties of
cataclysmic variables (CVs). By cross matching the catalogs of CVs
compiled with LAMOST DR3, acquired from October 2011 to July 2015, we
obtained the first spectroscopic catalog for CVs observed by LAMOST
with high signal to noise ratio, above 8. By integrating line
profiles, their equivalent widths (EWs) of the Hα, Hβ,
Hγ and Hδ, as well as HeI 5876 and 6678Å lines, were
calculated. There were 74 stellar spectra from 48 known CVs and three
spectra from three new CV candidates. At the same time, we also
collected their previously published EWs. Thirty-three objects had
repeated spectra and 30 stars showed spectral variability in the
Hα line. Moreover, we carried out photometric follow-up studies
for five CVs (UU Aqr, TT Tri, PX And, BP Lyn and RW Tri). We obtained
nine new light curves and revised their linear ephemerides. For RW
Tri, there is a possible oscillation with an amplitude of 0.0031(2)
days and a period of 47.6±0.4 years, which might be caused by a
third body (brown dwarf) or magnetic activity cycle.
Description:
We cross-matched the updated catalog of CVs (Downes et al..
2001PASP..113..764D 2001PASP..113..764D, Cat. V/123), 1043 CV candidates identified by
CRTS (Breedt et al., 2014, Cat. J/MNRAS/443/3174) and 285 CVs
identified from SDSS (Szkody et al., 2011, Cat. J/AJ/142/181) with
stellar spectra from LAMOST DR3.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 169 92 Parameters of CVs observed in LAMOST DR3
spectroscopic survey
--------------------------------------------------------------------------------
See also:
V/123 : Catalog of Cataclysmic Variables (Downes+ 2001-2006)
V/153 : LAMOST DR4 catalogs (Luo+, 2018)
J/AJ/142/181 : CVs from SDSS. VIII. The final year (Szkody+, 2011)
J/MNRAS/443/3174 : 72 faint CV candidates in CRTS (Breedt+, 2014)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- Star Star number, cvNN or nonCVnn (1)
9- 34 A26 --- LAMOST LAMOST name (LAMOST JHHMMSS.ss+DDMMSS.s)
36- 59 A24 --- OName Other Name
61 A1 --- First [Y/N] First time this spectrum has been
observed by LAMOST ?
63- 72 A10 "date" Date Observation date
74- 79 F6.3 mag umag ? SDSS u magnitude
81- 86 F6.3 mag zmag ? SDSS z magnitude
88- 93 F6.3 mag gmag ? SDSS g magnitude
95-100 F6.3 mag rmag ? SDSS r magnitude
102-107 F6.3 mag imag ? SDSS i magnitude
109-114 F6.3 mag Jmag ? 2MASS J magnitude
116-121 F6.3 mag Hmag ? 2MASS H magnitude
123-128 F6.3 mag Kmag ? 2MASS K magnitude
130-135 F6.2 --- snru Signal Noise Ratio of u filter
137-142 F6.2 --- snrg Signal Noise Ratio of g filter
144-149 F6.2 --- snrr Signal Noise Ratio of r filter
151-156 F6.2 --- snri Signal Noise Ratio of i filter
158-163 F6.2 --- snrz Signal Noise Ratio of z filter
165-169 A5 --- Ref Reference (2)
--------------------------------------------------------------------------------
Note (1): cv means known cv. Noncv means a non-cv object in the cv catalog
published by Downes et al. (2001PASP..113..764D 2001PASP..113..764D, Cat. V/123).
Note (2): References as follows:
1 = Downes et al., 2001PASP..113..764D 2001PASP..113..764D, Cat. V/123
2 = CRTS (Breedt et al. 2014, Cat. J/MNRAS/443/3174)
3 = LAMOST new cv candidates (Luo et al.. 2015RAA....15.1095L 2015RAA....15.1095L, Cat. V/146)
4 = SDSS (Szkody et al. 2011, Cat. J/AJ/142/181)
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 11-Jul-2019