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Astron. Astrophys. 358, L29-L32 (2000)
Letter to the Editor
Disk mass accretion rate and infrared flares in GRS 1915+105
T. Belloni 1,
S. Migliari 1,2 and
R.P. Fender 3
1 Osservatorio Astronomico di Brera, Via. E. Bianchi 46, 23870, Merate, Italy (belloni@merate.mi.astro.it)
2 Università degli Studi di Milano, Dipartimento di Fisica, Via Celoria 16, 20133, Milano, Italy (migliari@merate.mi.astro.it)
3 University of Amsterdam, Astronomical Institute "Anton Pannekoek" and Center for High-Energy Astrophysics, Kruislaan 403, 1098 SJ, Amsterdam, The Netherlands (rpf@astro.uva.nl)
Received 17 March 2000 / Accepted 15 May 2000
Abstract
We have analyzed in detail a set of Rossi X-ray Timing Explorer (RXTE) observations of the galactic microquasar GRS 1915+105 corresponding to times when quasi-periodic oscillations in the infrared have been reported. From time-resolved spectral analysis, we have estimated the mass accretion rate through the (variable) inner edge of the accretion disk. We compare this accretion rate to an estimate of the mass/energy outflow rate in the jet. We discuss the possible implications of these results in terms of disk-instability and jet ejection, and in particular note an apparent anti-correlation between the accretion and ejection rates, implying that the gas expelled in the jet must leave the accretion disk before reaching its innermost radius.
Key words: accretion, accretion
disks 
stars: binaries:
close
stars: individual:
GRS 1915+105
X-rays: stars
Send offprint requests to: T. Belloni
Contents
- 1. Introduction
- 2. Data analysis
- 3. Results
- 4. Discussion
- Acknowledgements
- References
© European Southern Observatory (ESO) 2000
Online publication: June 8, 2000
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