2014MNRAS.443.1319K


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.04CET19:16:48

2014MNRAS.443.1319K - Mon. Not. R. Astron. Soc., 443, 1319-1328 (2014/September-2)

Stellar mergers are common.

KOCHANEK C.S., ADAMS S.M. and BELCZYNSKI K.

Abstract (from CDS):

The observed Galactic rate of stellar mergers or the initiation of common envelope phases brighter than MV = -3 (MI = -4) is of the order of ∼ 0.5 (0.3)/yr with 90 percent confidence statistical uncertainties of 0.24-1.1 (0.14-0.65) and factor of ∼ 2 systematic uncertainties. The (peak) luminosity function is roughly dN/d L ∝L^-1.4±0.3, so the rates for events more luminous than V1309 Sco (MV ≃ -7 mag) or V838 Mon (MV ≃ -10 mag) are lower at r ∼ 0.1 and ∼ 0.03/year, respectively. The peak luminosity is a steep function of progenitor mass, LM2 - 3. This very roughly parallels the scaling of luminosity with mass on the main sequence, but the transients are ∼ 2000-4000 times more luminous at peak. Combining these, the mass function of the progenitors, dN/dMM-2.0±0.8, is consistent with the initial mass function, albeit with broad uncertainties. These observational results are also broadly consistent with the estimates of binary population synthesis models. While extragalactic variability surveys can better define the rates and properties of the high-luminosity events, systematic, moderate depth (I ≳ 16 mag) surveys of the Galactic plane are needed to characterize the low-luminosity events. The existing Galactic samples are only ∼ 20 percent complete, and Galactic surveys are (at best!) reaching a typical magnitude limit of ≲ 13 mag.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): stars: individual: M85 OT2006-1 - stars: individual: M31 RV - stars: individual: V838 Mon - stars: individual: V1309 Sco - stars: individual: V4332 Sgr - stars: individual: OGLE 2002-BLG-360

Simbad objects: 14

goto Full paper

goto View the reference in ADS

Number of rows : 14

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11108 1
2 NAME M31 RV No* 00 43 02.433 +41 12 56.17           M0 102 0
3 NGC 300 GiG 00 54 53.4460065856 -37 41 03.182962667 8.83 8.69 8.13 7.46   ~ 1339 2
4 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5219 1
5 V* V838 Mon CV* 07 04 04.8222936785 -03 50 50.637499515   15.5   15.18 14.51 M10+B3V 377 0
6 M 81 Sy2 09 55 33.17306143 +69 03 55.0609270   7.89 6.94     ~ 4013 5
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   ~ 184 0
9 EWS 2002-BLG-360 CV* 17 57 38.98752 -29 46 05.1636           ~ 29 0
10 NOVA Sgr 1943 No* 18 09 05.8471212448 -25 59 08.078050823           ~ 30 0
11 V* V4332 Sgr CV* 18 50 36.6959119600 -21 23 28.927014456         14.37 K8/M0e 146 0
12 V* CK Vul CV* 19 47 37.9563868576 +27 18 41.788878128           ~ 111 0
13 SN 2008S ev 20 34 45.33 +60 05 58.4   19.89 18.79 17.93   SNIIn? 214 1
14 NAME Galactic Bulge reg ~ ~           ~ 3493 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2014MNRAS.443.1319K and select 'bookmark this link' or equivalent in the popup menu


2020.12.04-19:16:48

© Université de Strasbourg/CNRS

    • Contact