2016A&A...589A...9C


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.02CET02:37:47

2016A&A...589A...9C - Astronomy and Astrophysics, volume 589A, 9-9 (2016/5-1)

Activity from the Be/X-ray binary system V0332+53 during its intermediate-luminosity outburst in 2008.

CABALLERO-GARCIA M.D., CAMERO-ARRANZ A., OZBEY ARABACI M., ZURITA C., SUSO J., GUTIERREZ-SOTO J., BEKLEN E., KIAEERAD F., GARRIDO R. and HUDEC R.

Abstract (from CDS):

Aims. We present a study of the Be/X-ray binary system V0332+53 with the main goal of characterizing its behaviour mainly during the intermediate-luminosity X-ray event in 2008. In addition, we aim to contribute to the understanding of the behaviour of the donor companion by including optical data from our dedicated campaign starting in 2006.
Methods. V 0332+53 was observed by RXTE and Swift during the decay of the intermediate-luminosity X-ray outburst of 2008, and with Suzaku before the rising of the third normal outburst of the 2010 series. In addition, we present recent data from the Spanish ground-based astronomical observatories of El Teide (Tenerife), Roque de los Muchachos (La Palma), and Sierra Nevada (Granada), and since 2006 from the Turkish TUBITAK National Observatory (Antalya). We have performed temporal analyses to investigate the transient behaviour of this system during several outbursts.
Results. Our optical study revealed that continuous mass ejection episodes from the Be star have been taking place since 2006 and another is currently ongoing. The broad-band 1-60keV X-ray spectrum of the neutron star during the decay of the 2008 outburst was well fitted with standard phenomenological models that were enhanced by an absorption feature of unknown origin at about 10keV and a narrow iron K-alpha fluorescence line at 6.4keV. For the first time in V 0332+53 we tentatively see an increase in the cyclotron line energy with increasing flux (although further and more sensitive observations are needed to confirm this). The fast aperiodic variability shows a quasi-periodic oscillation (QPO) at 227±9mHz only during the lowest luminosities, which might indicate that the inner regions surrounding the magnetosphere are more visible during the lowest flux states.

Abstract Copyright: © ESO, 2016

Journal keyword(s): X-rays: binaries - pulsars: general - stars: individual: V0332+53

Simbad objects: 4

goto Full paper

goto View the reference in ADS

Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* V635 Cas HXB 01 18 31.9704429246 +63 44 33.071137750 17.05 16.64 15.19 14.34 13.22 B0.2Ve 673 0
2 V* BQ Cam HXB 03 34 59.9116460415 +53 10 23.296351781   17.16 15.42 14.26 13.04 O8.5Ve 411 1
3 HD 245770 HXB 05 38 54.5749436467 +26 18 56.839215267 9.30 9.84 9.39 8.77 8.30 O9/B0III/Ve 885 0
4 XTE J1946+274 HXB 19 45 39.3569004855 +27 21 55.502556930   18.76 16.92 15.62 14.38 B0-1IV-Ve 104 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2016A&A...589A...9C and select 'bookmark this link' or equivalent in the popup menu


2021.03.02-02:37:47

© Université de Strasbourg/CNRS

    • Contact