2007AJ....133..255L

Query : 2007AJ....133..255L

2007AJ....133..255L - Astron. J., 133, 255-260 (2007/January-0)

Light-curve and radial velocity study of the contact binary BD +42 2782.

LU W., HRIVNAK B.J. and RUSH B.W.

Abstract (from CDS):

BD +42 2782 was recently discovered to be a variable star with a W UMa-type, eclipsing-binary light curve. We have obtained the first photoelectric light curves (RC, IC) and also the first radial velocity curves for this binary. These show the system to be a W UMa binary of the W type, with the less massive component eclipsed at primary minimum. The light and velocity curves have been analyzed in a consistent manner using the Wilson-Devinney synthetic light-curve code. The binary has an orbital inclination of 74°, a mass ratio of 0.48, a secondary component ∼150 K hotter than the primary, and an overcontact fill-out factor of 34%. Absolute parameters of the component stars are M1=1.38 M☉, R1=1.29 R☉, L1=1.75 L☉, and M2=0.67 M☉, R2=0.95 R☉, L2=1.05 L☉, and the calculated distance is 124±15 pc. Even when corrected for energy transfer between the two components, the more massive component is found to be underluminous for its mass. Several means to explain this are explored, but no completely satisfactory explanation is found.

Abstract Copyright: ∼

Journal keyword(s): Stars: Binaries: Eclipsing - stars: individual (BD +42 2782)

VizieR on-line data: <Available at CDS (J/AJ/133/255): table1.dat table3.dat>

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 BD+42 2782 SB* 17 01 21.8495239656 +42 09 49.915734732   10.11 9.51 9.303 8.679 G0 23 0

Query : 2007AJ....133..255L

Basic data :
BD+42 2782 -- Spectroscopic Binary
Other object types: otypes_help 		* (BD,AG,...), EB* (2006AJ,[GGM2006]), V* (1SWASP,V*), X (RX,1RXS), SB* (2022yCat), NIR (2MASS)
ICRS coord. (ep=J2000) : 		17 01 21.8495239656 +42 09 49.915734732 (Optical) [ 0.0112 0.0113 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		16 59 46.7052803263 +42 14 07.945126534 [ 0.0112 0.0113 90 ]
Gal coord. (ep=J2000) : 		066.8026743416606 +37.6529535678605 [ 0.0112 0.0113 90 ]
Proper motions mas/yr : 		-18.330 -22.965 [0.015 0.015 90] A 2020yCat.1350....0G
Parallaxes (mas): 		7.8062 [0.0124] A 2020yCat.1350....0G
Spectral type: 		G0 D ~
Fluxes (9) :
B 10.11 [0.03] D 2000A&A...355L..27H
V 9.51 [0.02] D 2000A&A...355L..27H
R 9.303 [0.03] D 2012yCat.1322....0Z
G 9.401396 [0.010462] C 2020yCat.1350....0G
I 8.679 [~] D 2012AJ....143...99T
J 8.331 [0.020] C 2003yCat.2246....0C
H 8.047 [0.017] C 2003yCat.2246....0C
K 7.993 [0.021] C 2003yCat.2246....0C
i 9.183 [0.18] E 2012yCat.1322....0Z
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Identifiers (24) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

BD+42 2782 IDS 16582+4219 AB SAO 46441 WDS J17014+4210AB
** A 1876AB 2MASS J17012185+4209499 1SWASP J170121.84+420949.9 [GGM2006] 5261236
ADS 10314 AB NSVS 5261237 TIC 198560607 [ZEH2003] RX J1701.3+4209 4
AG+42 1454 PPM 55859 TYC 3080-1410-1 Gaia DR2 1354723983279632000
CCDM J17014+4210AB RX J1701.3+4209 UCAC4 661-062504 Gaia DR3 1354723983279632000
GSC 03080-01410 1RXS J170121.5+420939 V* V1238 Her Gaia DR1 1354723978983802752

References (23 between 1850 and 2026) (Total 23)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Distance : 2    Var : 8    Plx : 3    PM : 3   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : BD+42 2782

Link by name to the catalogue in VizieR :

BD+42 2782 AG+42 1454 CCDM J17014+4210AB GSC 03080-01410 2MASS J17012185+4209499
PPM 55859 1RXS J170121.5+420939 SAO 46441 TYC 3080-1410-1 UCAC4 661-062504
V* V1238 Her WDS J17014+4210AB Gaia DR2 1354723983279632000 Gaia DR3 1354723983279632000 Gaia DR1 1354723978983802752

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