Time Evolution and the Nature of the Near-Infrared Jets in GRS1915+105

Details Time Evolution and the Nature of the Near-Infrared Jets in GRS1915+105 Time Evolution and the Nature of the Near-Infrared Jets in GRS1915+105

1996-09-26

arxiv.org/abs/astro-ph/9609181v1

Astronomy and Astrophysics

Astrophysics

10 pages, 3 figures; submitted to ApJ Letters

Scientific paper

10.1086/310450

We observed the galactic microquasar GRS1915+105 in the K ($2.2 \mu$m) band on October 16 and 17, 1995 UTC using the COB infrared (IR) imager on the Kitt Peak National Observatory 2.1-m telescope with a 0.2-arcsec/pixel plate scale and under good ($\sim 0.7$-arcsec) seeing conditions. Using a neighboring star in the image frames to determine the point spread function (PSF), we PSF-subtract the images of GRS1915+105. We find no evidence of extended emission such as the apparent near-IR jets seen by Sams et al. (1996) in July, 1995. Simple modelling of the star + jet structure allows us to place an upper limit on any similar emission at that position of $K>16.4$ at the 95% confidence level, as compared to $K=13.9$ as seen by Sams et al. (1996). This lack of extended IR flux during continued hard X-ray flaring activity confirms the hypothesis that the extended IR emission arises from the superluminal radio-emitting jets rather than reprocessing of the X-ray emission on other structures around the compact central object. Given the large apparent velocity of the radio-emitting jets, by the time of our observations the Sams et al. feature would have moved $>1$ arcsec from GRS1915+105, and we can place a limit of $K>17.7$ (95% confidence level) on any infrared emission in this region. We can thus place an upper limit on the radiative timescale of the feature of $\tau < 25$ days, which is consistent with synchrotron jet emission.

Affiliated with

Also associated with

No associations

Rating

Time Evolution and the Nature of the Near-Infrared Jets in GRS1915+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 Time Evolution and the Nature of the Near-Infrared Jets in GRS1915+105, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time Evolution and the Nature of the Near-Infrared Jets in GRS1915+105 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-112388