2016A&A...593A..16T


C.D.S. - SIMBAD4 rel 1.7 - 2020.05.31CEST00:46:00

2016A&A...593A..16T - Astronomy and Astrophysics, volume 593A, 16-16 (2016/9-1)

Propeller effect in two brightest transient X-ray pulsars: 4U 0115+63 and V 0332+53.

TSYGANKOV S.S., LUTOVINOV A.A., DOROSHENKO V., MUSHTUKOV A.A., SULEIMANOV V. and POUTANEN J.

Abstract (from CDS):

Aims. We present the results of the monitoring programmes performed with the Swift/XRT telescope and aimed specifically to detect an abrupt decrease of the observed flux associated with a transition to the propeller regime in two well-known X-ray pulsars 4U 0115+63 and V 0332+53.
Methods. Both sources form binary systems with Be optical companions and undergo so-called giant outbursts every 3-4 years. The current observational campaigns were performed with the Swift/XRT telescope in the soft X-ray band (0.5-10keV) during the declining phases of the outbursts exhibited by both sources in 2015.
Results. The transitions to the propeller regime were detected at the threshold luminosities of (1.4±0.4)x1036erg/s and (2.0±0.4)x1036erg/s for 4U 0115+63 and V 0332+53, respectively. Spectra of the sources are shown to be significantly softer during the low state. In both sources, the accretion at rates close to the aforementioned threshold values briefly resumes during the periastron passage following the transition into the propeller regime. The strength of the dipole component of the magnetic field required to inhibit the accretion agrees well with estimates based on the position of the cyclotron lines in their spectra, thus excluding presence of a strong multipole component of the magnetic field in the vicinity of the neutron star.

Abstract Copyright: © ESO, 2016

Journal keyword(s): accretion, accretion disks - magnetic fields - X-rays: binaries - stars: individual: 4U 0115+63 - stars: individual: V 0332+53

Status at CDS:  

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#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 658 0
2 V* GK Per No* 03 31 12.0096626899 +43 54 15.467450081   10.2 14.0     K1IV 865 0
3 V* BQ Cam HXB 03 34 59.9116460415 +53 10 23.296351781   17.16 15.42 14.26 13.04 O8.5Ve 396 1
4 V* GP Vel HXB 09 02 06.8610736194 -40 33 16.896402010 6.85 7.37 6.87 6.31 6.05 B0.5Ia 1370 0
5 [KCF2005] M82 G ULX 09 55 51.040 +69 40 45.49           ~ 157 1
6 4U 1907+09 HXB 19 09 37.9 +09 49 49   19.41 16.35 14.40 12.53 O8.5Iab 307 1

    Equat.    Gal    SGal    Ecl

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2020.05.31-00:46:00

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