2001A&A...376..599R


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.30CET02:43:08

2001A&A...376..599R - Astronomy and Astrophysics, volume 376, 599-605 (2001/9-3)

Variable gamma-ray emission from the Be/X-ray transient A0535+26?

ROMERO G.E., KAUFMAN BERNADO M.M., COMBI J.A. and TORRES D.F.

Abstract (from CDS):

We present a study of the unidentified gamma-ray source 3EG J0542+2610. This source is spatially superposed on the supernova remnant G180.0-1.7, but its time variability makes a physical link unlikely. We have searched in the EGRET location error box for compact radio sources that could be the low energy counterpart of the gamma-ray source. Although 29 point-like radio sources were detected and measured, none of them is strong enough to be considered the counterpart of a background gamma-ray emitting AGN. We suggest that the only object within the 95% error box capable of producing the required gamma-ray flux is the X-ray transient A0535+26. We show that this Be/accreting pulsar can produce variable hadronic gamma-ray emission through the mechanism originally proposed by Cheng & Ruderman (1989ApJ...337L..77C), where a proton beam accelerated in a magnetospheric electrostatic gap impacts the transient accretion disk.

Abstract Copyright:

Journal keyword(s): X-rays: stars - gamma-rays: theory - radio continuum: observations - stars: individual: A0535+26 - stars: neutron

Nomenclature: Table 1: [RKC2001] NN (Nos 1-29).

Simbad objects: 5

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Number of rows : 5

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* CM Tau Psr 05 34 31.93830 +22 00 52.1758           ~ 4833 1
2 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5654 4
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 879 0
4 SNR G180.0-01.7 SNR 05 39 00.000 +27 50 00.00           ~ 216 2
5 GRO J0542+26 gam 05 42 +26.0           ~ 19 1

    Equat.    Gal    SGal    Ecl

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2020.10.30-02:43:08

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