Low- and intermediate-mass close binary evolution and the initial–final mass relation – II. Non-conservative case with convective overshooting

By Zhanwen Han, C. Tout, P. P. E. T. Y. Observatory, I. Cambridge, Igpp, Llnl. 2000

136 citations recorded by the source corpus.

Employing Eggleton's stellar evolution code, we carry out 150 runs of non-conservative population I binary evolution calculations with the initial primary mass between 1 and 8 M., the initial mass ratio q = M-1/M-2 between 1.1 and 4 and the onset of Roche lobe overflow (RLOF) at early, middle or late Hertzsprung gap. Convective overshooting is included in our models and we assume that 50 per cent of the mass lost from the primary during the RLOF is accreted on to the secondary. The other 50 per cent is lost from the system, carrying away the same specific angular momentum as the centre of mass of the primary. We find that the remnant mass depends on when the RLOF begins in the Hertzsprung gap and the dependence increases with the primary mass. The remnant mass, however, does not depend much on the initial mass ratio, as in conservative cases. For q(i) = 1.1, we fit a formula for the remnant mass as a function of the initial mass M-1i of the primary and the radius of the primary at the onset of RLOF with an error of less than 2.61 per cent. We have also discussed the influences of the convective overshooting that makes the helium burning and carbon burning earlier and the final mass of the primary larger (for M-1i greater than 1.6 M.). The convective overshooting has no effect for low-mass binaries, consistent with the results of previous studies.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/75003ea79585e6a045e9c9cc1b24609d4bd0a4a3

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In Astronomy and Astrophysics

1. P. Podsiadlowski
2. Kevin Schawinski
3. Zhanwen Han
4. A. Lynas-Gray
5. Zhanwen Han
6. X. Meng
7. B. Wang
8. Z. Han

In Instrumentation

1. P. Podsiadlowski
2. X. Meng
3. B. Wang
4. Z. Han
5. X. Chen
6. A. Lynas-Gray
7. Thomas R. Marsh
8. Ulrich Kolb

Citations in the corpus

• The helium star donor channel for the progenitors of Type Ia supernovae (2009, background): “…simulation requires as input the initial mass function (IMF) of the primary, the mass-ratio distribution, the distribution of initial orbital separations, the eccentricity distribution of binary orbit, and the star formation rate (SFR) (e.g., Han et al. 1995a, 2002, 2003; Wang & Han 2009, 2010c).”
• A Binary Model for the UV-upturn of Elliptical Galaxies (2006, methodology): “The BPS code of Han et al. was originally developed in 1994 and has been updated regularly ever since (Han, Podsiadlowski & Eggleton 1994; Han 1995; Han, Podsiadlowski & Eggleton 1995a; Han et al. 1995b; Han 1998; Han et al. 2002, 2003; Han & Podsiadlowski 2004).”
• The origin of subdwarf B stars – II (2003, background): “To understand the formation of sdB stars, Han et al. (2002) (hereafter Paper I) have performed a systematic study of the various binary evolution channels that can produce sdB stars.”
• The origin of subdwarf B stars – I. The formation channels (2002, background): “…of sdB stars in wide binaries, which has not received much attention in the past, involves binaries that experience stable RLOF when passing through the Hertzsprung gap (so-called early case B mass transfer) (Han, Tout & Eggleton 2000; Han et al. 2002; in preparation [henceforth, Paper II]).”
• Detached white dwarf main-sequence star binaries (2004, background): “…binaries with low- to intermediate-mass component stars has been studied in detail by, e.g., Iben & Tutukov (1985, 1986a, 1987), van der Linden (1987), de Loore & Vanbeveren (1995), Langer et al. (2000), Han et al. (2000), Nelson & Eggleton (2001), Chen & Han (2002, 2003); and references therein.”