SIMBAD references

2015A&A...574A..33R - Astronomy and Astrophysics, volume 574A, 33-33 (2015/2-1)

Long-term variability of high-mass X-ray binaries. I. Photometry.

REIG P. and FABREGAT J.

Abstract (from CDS):

We present photometric observations of the field around the optical counterparts of high-mass X-ray binaries. Our aim is to study the long-term photometric variability in correlation with their X-ray activity and derive a set of secondary standard stars that can be used for time series analysis. We find that the donors in Be/X-ray binaries exhibit larger amplitude changes in the magnitudes and colours than those hosting a supergiant companion. The amplitude of variability increases with wavelength in Be/X-ray binaries and remains fairly constant in supergiant systems. When time scales of years are considered, a good correlation between the X-ray and optical variability is observed. The X-rays cease when optical brightness decreases. These results reflect the fact that the circumstellar disk in Be/X-ray binaries is the main source of both optical and X-ray variability. We also derive the colour excess, E(B-V), selecting data at times when the contribution of the circumstellar disk was supposed to be at minimum, and we revisit the distance estimates.

Abstract Copyright:

Journal keyword(s): techniques: photometric - stars: emission-line, Be - stars: neutron - X-rays: binaries

VizieR on-line data: <Available at CDS (J/A+A/574/A33): table1.dat table2.dat tablea.dat images/*>

Nomenclature: Table A.1: [RF2015] 2S 0114+65 CN (Nos C1-C4), [RF2015] 4U HHMM+DD CNN, [RF2015] IGR JHHMMm+DDMM CNN, [RF2015] RXJHHMM.m+DDMM CNN, [RF2015] V0332+53 CN (Nos C1-C6), [RF2015] AXJHHMM.m+DDMM CNN, [RF2015] XTE J1946+274 CNN, 1A 0535+262 (Nos C1-C7), [RF2015] KS 1947+300 CNN (C1-C10), [RF2015] EXO2030+375 CNN (Nos C1-C12), [RF2015] GROJ2058+42 CN (Nos C1-C9), [RF2015] SAXJHHMM.m+DDMM CNN, N=203.

Simbad objects: 21

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2020.12.03-09:30:41

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