2004A&A...419..645Y

Query : 2004A&A...419..645Y

2004A&A...419..645Y - Astronomy and Astrophysics, volume 419645-652 (2004/5-4)

Helium accreting CO white dwarfs with rotation: Helium novae instead of double detonation.

YOON S.-C. and LANGER N.

Abstract (from CDS):

We present evolutionary models of helium-accreting carbon-oxygen white dwarfs in which we include the effects of the spin-up of the accreting star induced by angular momentum accretion, rotationally induced chemical mixing and rotational energy dissipation. Initial masses of 0.6M_☉ and 0.8M_☉ and constant accretion rates of a few times 10^–8M_☉/yr of helium-rich matter have been considered, which is typical for the sub-Chandrasekhar mass progenitor scenario for Type Ia supernovae. It is found that the helium envelope in an accreting white dwarf is heated efficiently by friction in the differentially rotating spun-up layers. As a result, helium ignites much earlier and under much less degenerate conditions compared to the corresponding non-rotating case. Consequently, a helium detonation may be avoided, which questions the sub-Chandrasekhar mass progenitor scenario for Type Ia supernovae. We discuss implications of our results for the evolution of helium star plus white dwarf binary systems as possible progenitors of recurrent helium novae.

Abstract Copyright: ∼

Journal keyword(s): stars: evolution - stars: white dwarfs - stars: rotation - stars: novae, cataclysmic variables - stars: supernovae: general

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* V445 Pup	No*	07 37 56.8797787992	-25 56 58.837610328				13.654	12.849	~	197	0

Query : 2004A&A...419..645Y

Basic data :

V* V445 Pup -- Classical Nova

* (UCAC4,USNO,...), No* (2021MNRAS,NOVA), V* (V*,AAVSO), NIR (DENIS,2MASS), MIR (WISEA,WISE), CV* (2020MNRAS)

07 37 56.8797787992 -25 56 58.837610328 (Optical) [ 0.6683 0.9439 90 ] C 2020yCat.1350....0G

07 35 52.7226840011 -25 50 07.549172679 [ 0.6683 0.9439 90 ]

241.1237466019293 -02.1914852130521 [ 0.6683 0.9439 90 ]

R 13.654 [0.07] E 2012yCat.1322....0Z

G 19.371229 [0.008811] C 2020yCat.1350....0G

I 12.849 [0.02] C 2005yCat.2263....0T

J 12.271 [0.026] C 2003yCat.2246....0C

H 11.936 [0.024] C 2003yCat.2246....0C

K 11.518 [0.025] C 2003yCat.2246....0C

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`NOVA Pup 2000`	`TIC 110608220`	*`V V445 Pup`**	`AAVSO 0733-25`
`DENIS J073756.8-255659`	`UCAC4 321-028955`	`WISEA J073756.89-255658.9`	`Gaia DR3 5614101084334720000`
`2MASS J07375688-2556589`	`USNO-A2.0 0600-06937901`	`WISE J073756.89-255658.9`	`Gaia DR2 5614101084334720000`

References (197 between 1850 and 2026) (Total 197)
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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`DENIS J073756.8-255659`	`2MASS J07375688-2556589`	`UCAC4 321-028955`	`USNO-A2.0 0600-06937901`	*`V V445 Pup`**
`WISEA J073756.89-255658.9`	`WISE J073756.89-255658.9`	`Gaia DR3 5614101084334720000`	`Gaia DR2 5614101084334720000`

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