2017JAVSO..45..140S

Query : 2017JAVSO..45..140S

2017JAVSO..45..140S - J. Am. Assoc. Variable star obs., 45, 140 (2017/December-1)

Observations and Analysis of the Extreme Mass Ratio, High Fill-out Solar Type Binary, V1695 Aquilae.

SAMEC R.G., GRAY C.R., CATON D., FAULKNER D.R., HILL R. and HAMME W.V.

Abstract (from CDS):

CCD BVRcIc light curves of V1695 Aquilae were taken during the Fall 2016 season at the Cerro Tololo InterAmerican Observatory with the 0.6-meter reflector of the SARA South observatory in remote mode. It is an eclipsing binary with a period of 0.41283 d. The light curves yield a total eclipse (duration: 59 minutes) but have an amplitude of only ∼0.4 mag. The spectral type is ∼G8V (∼5500 K). Four times of minimum light were calculated, all primary eclipses, from our present observations. We calculated linear and quadratic ephemerides from all available times of minimum light. A 17-year period study reveals a quadratic orbital period decrease at a high level of confidence. The orbital period is changing at a rapid rate of of dp/ dt = -1.73 x 10-6 d/yr. The solution is that of an Extreme Mass Ratio Binary. The mass ratio is found to be near 0.16. Its Roche Lobe fill-out is a hefty 83%. The small component has the slightly hotter temperature of ∼5650 K, which makes it a W-type W UMa Binary. As expected in binaries of this spectral type, it has cool spot regions.

Abstract Copyright: © (c)2017: The American Association of Variable Star Observers

Journal keyword(s): binaries: close - binaries: eclipsing - stars: evolution - stars: individual: (V1695 AQL)

Status at CDS : Objects in title, abstract, text, figures, and all or part of small table(s) being processed in SIMBAD.

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 V* V1695 Aql EB* 19 38 22.2979656504 -03 32 37.145533812   11.64 10.92     ~ 13 0

Query : 2017JAVSO..45..140S

Basic data :
V* V1695 Aql -- Eclipsing Binary
Other object types: otypes_help 		* (BD,GSC,...), EB* (2009AJ), V* (ASAS,Brh,...), X (1RXS), NIR (2MASS)
ICRS coord. (ep=J2000) : 		19 38 22.2979656504 -03 32 37.145533812 (Optical) [ 0.0245 0.0188 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		19 35 44.6532974089 -03 39 28.354107491 [ 0.0245 0.0188 90 ]
Gal coord. (ep=J2000) : 		035.1319380772632 -12.0534781515897 [ 0.0245 0.0188 90 ]
Proper motions mas/yr : 		9.060 -13.651 [0.029 0.022 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -33.59 [3.23] / z(spectroscopic) -0.000112 [0.000011] / cz -33.59 [3.23]
   (Opt) C 2018yCat.1345....0G
Parallaxes (mas): 		3.7151 [0.0264] A 2020yCat.1350....0G
Fluxes (6) :
B 11.64 [0.08] D 2000A&A...355L..27H
V 10.92 [0.07] D 2000A&A...355L..27H
G 10.829258 [0.008190] C 2020yCat.1350....0G
J 9.558 [0.024] C 2003yCat.2246....0C
H 9.263 [0.027] C 2003yCat.2246....0C
K 9.158 [0.023] C 2003yCat.2246....0C
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Identifiers (13) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

BD-03 4659 2MASS J19382229-0332372 TYC 5149-2845-1 Gaia DR1 4210690038968643200
ASAS J193822-0332.6 NSVS 14143847 V* V1695 Aql
Brh V121 1RXS J193821.2-033245 Gaia DR2 4210690043276412160
GSC 05149-02845 TIC 249928714 Gaia DR3 4210690043276412160

References (13 between 1850 and 2026) (Total 13)
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

Velocities : 1    Distance : 2    Var : 3    Plx : 3    PM : 2   

   

External archives :

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

Link by name to the catalogue in VizieR :

BD-03 4659 GSC 05149-02845 2MASS J19382229-0332372 1RXS J193821.2-033245 TYC 5149-2845-1
V* V1695 Aql Gaia DR2 4210690043276412160 Gaia DR3 4210690043276412160 Gaia DR1 4210690038968643200

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