2002A&A...388L..33I


Query : 2002A&A...388L..33I

2002A&A...388L..33I - Astronomy and Astrophysics, volume 388, L33-36 (2002/6-3)

Evidence for synchrotron bubbles from GRS 1915+105.

ISHWARA-CHANDRA C.H., YADAV J.S. and RAO A.P.

Abstract (from CDS):

We present GMRT observations of the Galactic microquasar GRS 1915+105 at 1.28GHz for 8 days from 2001 June 18 to July 1. We have seen several isolated radio flares of varying magnitudes (20-50mJy) and durations (6-35min) and we model them as due to adiabatically expanding synchrotron emitting clouds (synchrotron bubbles) ejected from the accretion disk. By applying this model, we provide a new method to estimate the electron power-law index p, hence the spectral index, from single frequency radio observations. This method does not require correction for the optical time delay effects which may be important in the case of optically thick radio emission. Using our estimated value of p and simultaneous multiwavelength data from literature, we have calculated the time of ejection of the synchrotron plasma and the time delays at different observed frequencies. Our estimates are in good agreement with the observed time delays.

Abstract Copyright:

Journal keyword(s): stars: individual: GRS 1915+105 - radio continuum: stars - X-rays: binaries

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2693 2
2 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4099 2
3 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2454 0

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2022.08.17-15:22:05

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