SIMBAD references

2012A&A...537A..76S - Astronomy and Astrophysics, volume 537A, 76-76 (2012/1-1)

A new super-soft X-ray source in the Small Magellanic Cloud: discovery of the first Be/white dwarf system in the SMC ?

STURM R., HABERL F., PIETSCH W., COE M.J., MEREGHETTI S., LA PALOMBARA N., OWEN R.A. and UDALSKI A.

Abstract (from CDS):

The Small Magellanic Cloud (SMC) hosts a large number of Be/X-ray binaries, however no Be/white dwarf system is known so far, although population synthesis calculations predict that they might be more frequent than Be/neutron star systems. XMMUJ010147.5-715550 was found as a new faint super-soft X-ray source (SSS) with a likely Be star optical counterpart. We investigate the nature of this system and search for further high-absorbed candidates in the SMC. We analysed the XMM-Newton X-ray spectrum and light curve, optical photometry, and the I-band OGLE III light curve. The X-ray spectrum is well represented by black-body and white dwarf atmosphere models with highly model-dependent temperature between 20 and 100eV. The likely optical counterpart AzV281 showed low near infrared emission during X-ray activity, followed by a brightening in the I-band afterwards. We find further candidates for high-absorbed SSSs with a blue star as counterpart. We discuss XMMUJ010147.5-715550 as the first candidate for a Be/white dwarf binary system in the SMC.

Abstract Copyright:

Journal keyword(s): X-rays: binaries - galaxies: stellar content - white dwarfs - stars: emission-line, Be - galaxies: individual: SMC

Nomenclature: Table 3 : [SHP2012] JHHMMSS.ss+DDMMSS.s N=10

Simbad objects: 21

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2020.01.27-03:47:54

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