2018MNRAS.478.5626B

Query : 2018MNRAS.478.5626B

2018MNRAS.478.5626B - Mon. Not. R. Astron. Soc., 478, 5626-5637 (2018/August-3)

No cataclysmic variables missing: higher merger rate brings into agreement observed and predicted space densities.

BELLONI D., SCHREIBER M.R., ZOROTOVIC M., ILKIEWICZ K., HURLEY J.R., GIERSZ M. and LAGOS F.

Abstract (from CDS):

The predicted and observed space density of cataclysmic variables (CVs) has been for a long time discrepant by at least an order of magnitude. The standard model of CV evolution predicts that the vast majority of CVs should be period bouncers, whose space density has been recently measured to be ρ <= 2 x 10–5 pc–3. We performed population synthesis of CVs using an updated version of the Binary Stellar Evolution (BSE) code for single and binary star evolution. We find that the recently suggested empirical prescription of consequential angular momentum loss (CAML) brings into agreement predicted and observed space densities of CVs and period bouncers. To progress with our understanding of CV evolution it is crucial to understand the physical mechanism behind empirical CAML. Our changes to the BSE code are also provided in details, which will allow the community to accurately model mass transfer in interacting binaries in which degenerate objects accrete from low-mass main-sequence donor stars.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: numerical - stars: evolution - novae, cataclysmic variables

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* V404 Cyg HXB 20 24 03.8247037434 +33 52 01.961154861           G9/K0III/V 1370 0

Query : 2018MNRAS.478.5626B

Basic data :
V* V404 Cyg -- High Mass X-ray Binary
Other object types: otypes_help 		X (2022MNRAS,Ginga,...), V* (AN,V*,...), HXB (2016ApJS), No* (NOVA), CV* (2017ARep), * (Gaia), gam (INTREF), NIR (2MASS)
ICRS coord. (ep=J2000) : 		20 24 03.8247037434 +33 52 01.961154861 (Optical) [ 0.0525 0.0607 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		20 22 06.3348384828 +33 42 16.551672751 [ 0.0525 0.0607 90 ]
Gal coord. (ep=J2000) : 		073.1187765506885 -02.0914613435731 [ 0.0525 0.0607 90 ]
Proper motions mas/yr : 		-5.177 -7.778 [0.079 0.092 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -0.400 [~] / z(~) -0.000001 [~] / cz -0.40 [~]
   E 2000A&AS..144....1M
Parallaxes (mas): 		0.3024 [0.0783] A 2020yCat.1350....0G
Spectral type: 		G9/K0III/V E 1993MNRAS.265..834C
Fluxes (4) :
G 17.215652 [0.008512] C 2022yCat.1355....0G
J 13.575 [0.025] C 2003yCat.2246....0C
H 12.684 [0.027] C 2003yCat.2246....0C
K 12.321 [0.026] C 2003yCat.2246....0C
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Identifiers (16) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

2MASS J20240382+3352021 INTREF 1021 1SXPS J202404.2+335155 4XMM J202403.8+335202
AN 100.1938 NOVA Cyg 1938 2SXPS J202404.0+335151 AAVSO 2020+33
Ginga 2023+338 NOVA Cyg 1989 TIC 136874944 Gaia DR2 2056188624872569088
Ginga 2023+33 1RXS J202405.3+335157 V* V404 Cyg Gaia DR3 2056188624872569088

References (1370 between 1850 and 2026) (Total 1370)
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

Plx : 2    PM : 2    SpT : 1   

   

Observing logs
ISO : 2    IUE : 4   

   

External archives :

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

Link by name to the catalogue in VizieR :

2MASS J20240382+3352021 1RXS J202405.3+335157 V* V404 Cyg Gaia DR2 2056188624872569088 Gaia DR3 2056188624872569088

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