SIMBAD references

2018MNRAS.475L.111S - Mon. Not. R. Astron. Soc., 475, L111-L115 (2018)

Chandra X-ray constraints on the candidate Ca-rich gap transient SN 2016hnk.

SELL P.H., ARUR K., MACCARONE T.J., KOTAK R., KNIGGE C., SAND D.J. and VALENTI S.

Abstract (from CDS):

We present a Chandra observation of SN 2016hnk, a candidate Ca-rich gap transient. This observation was specifically designed to test whether or not this transient was the result of the tidal detonation of a white dwarf by an intermediate-mass black hole. Since we detect no X-ray emission 28 d after the discovery of the transient, as predicted from fall-back accretion, we rule out this model. Our upper limit of ∼10 M does not allow us to rule out a neutron star or stellar-mass black hole detonator due limits on the sensitivity of Chandra to soft X-rays and unconstrained variables tied to the structure of super-Eddington accretion discs. Together with other Chandra and multiwavelength observations, our analysis strongly argues against the intermediate-mass black hole tidal detonation scenario for Ca-rich gap transients more generally.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): accretion, accretion discs - binaries: close - white dwarfs

Simbad objects: 7

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