2010A&A...517L...5O


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.16CEST23:06:35

2010A&A...517L...5O - Astronomy and Astrophysics, volume 517, L5-5 (2010/7-1)

Optical identification of the transient supersoft X-ray source RX J0527.8-6954, in the LMC.

OLIVEIRA A.S., STEINER J.E., RICCI T.V., MENEZES R.B. and BORGES B.W.

Abstract (from CDS):

Close binary supersoft X-ray sources (CBSS) are binary systems that contain a white dwarf with stable nuclear burning on its surface. These sources, first discovered in the Magellanic Clouds, have high accretion rates and near-Eddington luminosities (1037-1038erg/s) with high temperatures (T=2-7x105K). The total number of known objects in the MC is still small and, in our galaxy, even smaller. We observed the field of the unidentified transient supersoft X-ray source RX J0527.8-6954 in order to identify its optical counterpart. The observation was made with the IFU-GMOS on the Gemini South telescope with the purpose of identifying stars with possible HeII or Balmer emission or else of observing nebular extended jets or ionization cones, features that may be expected in CBSS. The X-ray source is identified with a B5e V star that is associated with subarcsecond extended Hα emission, possibly bipolar. If the primary star is a white dwarf, as suggested by the supersoft X-ray spectrum, the expected orbital period exceeds 21h; therefore, we believe that the 9.4h period found so far is not associated to this system.

Abstract Copyright:

Journal keyword(s): binaries: close - stars: winds, outflows - X-rays: binaries - stars: individual: RX J0527.8-6954

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10561 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9088 1
3 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5373 1
4 SV* HV 5682 XB* 05 13 50.809 -69 51 47.30     16.566 16.606 16.62 ~ 304 0
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14323 1
6 SV* HV 2554 V* 05 27 48.6 -69 54 02   19       ~ 52 1
7 2E 1550 XB* 05 43 34.1600994175 -68 22 22.189299745   15.9   17.2 16.54 ~ 304 0
8 V* V Sge NL* 20 20 14.6910210608 +21 06 10.437296116   11.27 11.22 11.54   Be 201 0

    Equat.    Gal    SGal    Ecl

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2019.10.16-23:06:35

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