Rapid Changes in the Structure of the BN Object

Details Rapid Changes in the Structure of the BN Object Rapid Changes in the Structure of the BN Object

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...19915603d&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #156.03; Bulletin of the American Astronomical Society, Vol. 34, p.563

Other

Scientific paper

The BN/KL region in Orion is the archetypal region of high-mass star formation, radiating about 105 LSun and displaying promininent bulk mass flows. The Becklin-Neugebauer object (BN) is an early-type massive star that is not visible at optical wavelengths, because of extinction, but is the most prominent source in the region at near-infrared wavelengths We used the LWS instrument on the Keck-I telescope to make 12.5μ m and 18.7μ m images in December 1999 and October 2000. We have discovered an infrared counterpart to the centermeter-wave radio ``companion'' observed about 1.5 arcsec west of BN. This secondary object (a.k.a. B2) is present at both epochs and does not appear to move, on 0.1 arcsec scales. We also see changes in the shape of BN, which may a consequence of ``bullets'' of material being ejected. These bullets are only detected at 18.7μ m. Such changes have not been seen before at infrared wavelengths. Careful inspection of images for BN and a calibrator, obtained within a few minutes of eachother, does not suggest the putative bullets are imaging artifacts. We explore several possible scenarios to explain the changes in the mid-infrared appearance of BN on one year time scales.

Affiliated with

Also associated with

No associations

Rating

Rapid Changes in the Structure of the BN Object 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 Rapid Changes in the Structure of the BN Object, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rapid Changes in the Structure of the BN Object will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1237924