2019MNRAS.489.3031X

Query : 2019MNRAS.489.3031X

2019MNRAS.489.3031X - Mon. Not. R. Astron. Soc., 489, 3031-3035 (2019/November-1)

V1082-Sgr: A magnetic cataclysmic variable with a lobe-filling companion star.

XU X., SHAO Y. and LI X.-D.

Abstract (from CDS):

V1082 Sgr is a cataclysmic variable with accretion luminosity above 1034 erg s–1, indicating a mass-transfer rate above 10–9 M☉ yr–1. However, its K-type companion was suggested to be underfilling its Roche lobe (RL), making the high mass-transfer rate a mystery. In this work we propose a possible model to explain this discrepancy. The system is proposed to be an intermediate polar, with its K-type companion filling its RL. The mass of the white dwarf star is evaluated to be 0.77±0.11 M☉ from both X-ray continuum fitting and Fe line flux ratio measurements. We make numerical simulations to search for the possible progenitors of the system. The results show that a binary with an initial 1.5-2.5 M☉ companion in a one to two day orbit (or an initial 1.0-1.4 M☉ companion in a 3.2-4.1 d orbit) may naturally evolve to a cataclysmic variable with a ∼0.55 ±0.11 M☉, Roche-lobe-filling companion in a 0.86 d orbit. The effective temperature of the donor star, the mass-transfer rate, and the derived V-band magnitude are all consistent with previous observations.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: evolution - cataclysmic variables - X-rays: binaries

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* V1082 Sgr CV* 19 07 21.8657193048 -20 46 50.532061692           ~ 39 0

Query : 2019MNRAS.489.3031X

Basic data :
V* V1082 Sgr -- Cataclysmic Binary
Other object types: otypes_help 		* (2022AJ,AP,...), X (2022MNRAS,PBC,...), CV* (2013ApJS), SB* (2004A&A,SBC9), V* (V*,AAVSO), NIR (2MASS)
ICRS coord. (ep=J2000) : 		19 07 21.8657193048 -20 46 50.532061692 (Optical) [ 0.0178 0.0159 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		19 04 23.7193241932 -20 51 34.582074304 [ 0.0178 0.0159 90 ]
Gal coord. (ep=J2000) : 		015.8753693366260 -12.6830136671188 [ 0.0178 0.0159 90 ]
Proper motions mas/yr : 		-0.769 -2.435 [0.021 0.018 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 11.1074 [0.1447] / z(spectroscopic) 0.000037 [0.000000] / cz 11.11 [0.14]
   (NIR) A 2022ApJS..259...35A
Parallaxes (mas): 		1.5101 [0.0187] A 2020yCat.1350....0G
Fluxes (4) :
G 13.985795 [0.020046] C 2020yCat.1350....0G
J 12.514 [0.023] C 2003yCat.2246....0C
H 12.008 [0.022] C 2003yCat.2246....0C
K 11.825 [0.023] C 2003yCat.2246....0C
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Identifiers (12) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

2MASS J19072186-2046505 PBC J1907.2-2048 SWIFT J1907.3-2050 AAVSO 1901-20
AP J19072186-2046505 SBC9 3585 TIC 397773193 Gaia DR3 4082090647900737152
EPIC 217321042 SRGA J190722.0-204635 V* V1082 Sgr Gaia DR2 4082090647900737152

References (39 between 1850 and 2026) (Total 39)
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 : 3    Rot : 1    Fe/H : 2    Plx : 2    PM : 2   

   

Observing logs
IUE : 2   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : V* V1082 Sgr

Link by name to the catalogue in VizieR :

2MASS J19072186-2046505 AP J19072186-2046505 V* V1082 Sgr Gaia DR3 4082090647900737152 Gaia DR2 4082090647900737152

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