2016MNRAS.455.4351P


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST03:40:37

2016MNRAS.455.4351P - Mon. Not. R. Astron. Soc., 455, 4351-4372 (2016/February-1)

Cool and luminous transients from mass-losing binary stars.

PEJCHA O., METZGER B.D. and TOMIDA K.

Abstract (from CDS):

We study transients produced by equatorial disc-like outflows from catastrophically mass-losing binary stars with an asymptotic velocity and energy deposition rate near the inner edge which are proportional to the binary escape velocity vesc. As a test case, we present the first smoothed-particle radiation-hydrodynamics calculations of the mass loss from the outer Lagrange point with realistic equation of state and opacities. The resulting spiral stream becomes unbound for binary mass ratios 0.06 ≲ q ≲ 0.8. For synchronous binaries with non-degenerate components, the spiral-stream arms merge at a radius of ∼ 10a, where a is the binary semi-major axis, and the accompanying shock thermalizes about 10 percent of the kinetic power of the outflow. The mass-losing binary outflows produce luminosities reaching up to ∼ 106L and effective temperatures spanning 500 ≲ Teff ≲ 6000 K, which is compatible with many of the class of recently discovered red transients such as V838 Mon and V1309 Sco. Dust readily forms in the outflow, potentially in a catastrophic global cooling transition. The appearance of the transient is viewing angle-dependent due to vastly different optical depths parallel and perpendicular to the binary plane. We predict a correlation between the peak luminosity and the outflow velocity, which is roughly obeyed by the known red transients. Outflows from mass-losing binaries can produce luminous (105L) and cool (Teff ≲ 1500 K) transients lasting a year or longer, as has potentially been detected by Spitzer surveys of nearby galaxies.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): binaries: close - binaries: general - stars: evolution - stars: winds, outflows

Simbad objects: 12

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Number of rows : 12

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 M31N 2015-01a No* 00 42 07.99 +40 55 01.1           ~ 42 0
2 NAME M31 RV No* 00 43 02.433 +41 12 56.17           M0 102 0
3 NAME NGC 300 OT2008-1 ev 00 54 34.16 -37 38 28.6           ~ 109 1
4 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4525 2
5 V* V838 Mon CV* 07 04 04.8222936785 -03 50 50.637499515   15.5   15.18 14.51 M10+B3V 375 0
6 PTF 10fqs SN* 12 18 50.16 +14 26 39.2       20.0   ~ 28 0
7 NAME M85 OT2006-1 No* 12 25 23.82 +18 10 56.2     19.30     ~ 57 1
8 V* V1309 Sco CV* 17 57 32.9383021931 -30 43 09.967391199   16.9   14.8   ~ 182 0
9 EWS 2002-BLG-360 CV* 17 57 38.98752 -29 46 05.1636           ~ 28 0
10 V* V4332 Sgr CV* 18 50 36.6959119600 -21 23 28.927014456         14.37 K8/M0e 145 0
11 V* CK Vul CV* 19 47 37.9563868576 +27 18 41.788878128           ~ 109 0
12 SN 2008S ev 20 34 45.33 +60 05 58.4   19.89 18.79 17.93   SNIIn? 214 1

    Equat.    Gal    SGal    Ecl

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2020.10.24-03:40:37

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