2024MNRAS.52711184A

Query : 2024MNRAS.52711184A

2024MNRAS.52711184A - Mon. Not. R. Astron. Soc., 527, 11184-11197 (2024/February-1)

The mass range of hot subdwarf B stars from MESA simulations.

ARANCIBIA-ROJAS E., ZOROTOVIC M., VUCKOVIC M., BOBRICK A., VOS J. and PIRAINO-CERDA F.

Abstract (from CDS):

Hot subdwarf B (sdB) stars are helium core burning stars that have lost almost their entire hydrogen envelope due to binary interaction. Their assumed canonical mass of ${M_{\mathrm{sdB}}}\sim 0.47$ M⊙ has recently been debated given a broad range found both from observations as well as from the simulations. Here, we revise and refine the mass range for sdBs derived two decades ago with the Eggleton code, using the stellar evolution code MESA, and discuss the effects of metallicity and the inclusion of core overshooting during the main sequence. We find an excellent agreement for low-mass progenitors, up to ∼2.0 M⊙. For stars more massive than ∼2.5 M⊙, we obtain a wider range of sdB masses compared to the simulations from the literature. Our MESA models for the lower metallicity predict, on average, slightly more massive sdBs. Finally, we show the results for the sdB lifetime as a function of sdB mass and discuss the effect this might have in the comparison between simulations and observational samples. This study paves the way for reproducing the observed Galactic mass distribution of sdB binaries.

Abstract Copyright: © 2023 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): binaries: general - stars: evolution - stars: mass-loss - subdwarfs - Galaxy: evolution

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 UCAC4 689-072699 HS* 19 53 08.3854563936 +47 43 00.177113460   14.695 14.902 15.419   sdB 34 1

Query : 2024MNRAS.52711184A

Basic data :
UCAC4 689-072699 -- Hot Subdwarf
Other object types: otypes_help 		HS* (2011MNRAS), SB* (2014A&A), * (UCAC4,KIC,...), blu (2019A&A), Em* (2023ApJS), Pu* (2011MNRAS), NIR (2MASS), Opt (LAMOST)
ICRS coord. (ep=J2000) : 		19 53 08.3854563936 +47 43 00.177113460 (Optical) [ 0.0231 0.0258 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		19 51 39.2801080448 +47 35 08.020818676 [ 0.0231 0.0258 90 ]
Gal coord. (ep=J2000) : 		081.7009551340473 +10.2581103678178 [ 0.0231 0.0258 90 ]
Proper motions mas/yr : 		-4.144 3.224 [0.030 0.033 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -4.31 [0.67] / z(spectroscopic) -0.000014 [0.000002] / cz -4.31 [0.67]
   (Opt) A 2023ApJS..264...17Z
Parallaxes (mas): 		0.776 [0.0269] A 2020yCat.1350....0G
Spectral type: 		sdB D 2011MNRAS.414.2871B
Fluxes (9) :
B 14.695 [0.19] D 2012yCat.1322....0Z
V 14.902 [0.08] D 2012yCat.1322....0Z
R 15.419 [0.07] E 2012yCat.1322....0Z
G 14.981389 [0.002823] C 2020yCat.1350....0G
J 15.446 [0.047] C 2003yCat.2246....0C
H 15.538 [0.092] C 2003yCat.2246....0C
g 14.660 [0.13] D 2012yCat.1322....0Z
r 14.957 [0.08] D 2012yCat.1322....0Z
i 15.083 [0.23] D 2012yCat.1322....0Z
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Identifiers (8) :
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UCAC4 689-072699 LAMOST J195308.39+474300.2 TIC 273875093 Gaia DR3 2086441927825846656
KIC 10553698 2MASS J19530839+4743002 EQ J1953.1+4743 Gaia DR2 2086441927825846656

References (34 between 1850 and 2026) (Total 34)
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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Velocities : 4    Distance : 2    Var : 3    Fe/H : 5    Plx : 2    PM : 2    SpT : 6   

   

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UCAC4 689-072699 KIC 10553698 2MASS J19530839+4743002 Gaia DR3 2086441927825846656 Gaia DR2 2086441927825846656

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