NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-17 T02:32:07 PDT
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For refcode 2014MNRAS.443.1319K:
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NED Abstract

Copyright by Royal Astronomical Society. 2014MNRAS.443.1319K Stellar mergers are common Kochanek, C. S.; Adams, Scott M.; Belczynski, Krzysztof Abstract. The observed Galactic rate of stellar mergers or the initiation of common envelope phases brighter than M_V_ = -3 (M_I_ = -4) is of the order of ~0.5 (0.3) yr^-1^ with 90 per cent confidence statistical uncertainties of 0.24-1.1 (0.14-0.65) and factor of ~2 systematic uncertainties. The (peak) luminosity function is roughly {d}N/{d} L is proportional to L^{-1.4+/- 0.3}, so the rates for events more luminous than V1309 Sco (M_V_ ~= -7 mag) or V838 Mon (M_V_ ~= -10 mag) are lower at r ~ 0.1 and ~0.03/year, respectively. The peak luminosity is a steep function of progenitor mass, L is proportional to M^2 - 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/dM is proportional to M^-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 per cent complete, and Galactic surveys are (at best!) reaching a typical magnitude limit of <~ 13 mag. Key words: 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
Retrieve 2 NED objects in this reference.
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