Detection of a Series of X-ray Dips Associated with a Radio Flare in GRS 1915+105

Details Detection of a Series of X-ray Dips Associated with a Radio Flare in GRS 1915+105 Detection of a Series of X-ray Dips Associated with a Radio Flare in GRS 1915+105

2000-08-27

arxiv.org/abs/astro-ph/0008414v1

Astronomy and Astrophysics

Astrophysics

18 pages, 7 figures, Accepted for publication in ApJ

Scientific paper

10.1086/318280

We report the detection of a series of X-ray dips in the Galactic black hole candidate GRS 1915+105 during 1999 June 6-17 from observations carried out with the Pointed Proportional Counters of the Indian X-ray Astronomy Experiment on board the Indian satellite IRS-P3. The observations were made after the source made a transition from a steady low-hard state to a chaotic state which occuered within a few hours. Dips of about 20-160 seconds duration are observed on most of the days. The X-ray emission outside the dips shows a QPO at ~ 4 Hz which has characteristics similar to the ubiquitous 0.5 - 10 Hz QPO seen during the low-hard state of the source. During the onset of dips this QPO is absent and also the energy spectrum is soft and the variability is low compared to the non-dip periods. These features gradually re-appear as the dip recovers. The onset of the occurrence of a large number of such dips followed the start of a huge radio flare of strength 0.48 Jy (at 2.25 GHz). We interpret these dips as the cause for mass ejection due to the evacuation of matter from an accretion disk around the black hole. We propose that a super-position of a large number of such dip events produces a huge radio jet in GRS 1915+105.

Affiliated with

Also associated with

No associations

Rating

Detection of a Series of X-ray Dips Associated with a Radio Flare in GRS 1915+105 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Detection of a Series of X-ray Dips Associated with a Radio Flare in GRS 1915+105, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of a Series of X-ray Dips Associated with a Radio Flare in GRS 1915+105 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-100565