Destruction of the Environment of the BN-KL Nebula

Details Destruction of the Environment of the BN-KL Nebula Destruction of the Environment of the BN-KL Nebula

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...511..822s&link_type=abstract

The Astrophysical Journal, Volume 511, Issue 2, pp. 822-835.

Astronomy and Astrophysics

Astronomy

41

Infrared: Ism: Continuum, Ism: Individual: Alphanumeric: Omc-1

Scientific paper

We describe observations of the 2.12 μm molecular hydrogen emission in Orion using an IR Fabry-Perot interferometer with a spectral resolution of 24 km s^-1 and a 2" spatial resolution covering a region of 3.6′x3.6′ (0.46x0.46 pc^2) that contains the H_2 filamentary finger system located to the northwest of the Trapezium. We develop a simple model to explain the observed low-velocity structure as described by its radial moments: intensity, velocity centroid, velocity dispersion, and skewness. We assume a strong wind of 230 km s^-1 produced by IRc2 interacting with a set of molecular clumps with density of 5.6x10^5 cm^-3. This simple model provides a good match to the observed moments, gives clues to the development of filaments or fingers and entrainment of the molecular material, and associates the observed high-velocity blueshifted emission to the region. The driving source of the wind requires a high mass-loss rate and thus is likely IRc2. The H_2 line emission is produced by a slow J-type shock (20 km s^-1) in the clumps with an emissivity proportional to v^1.8. Estimates for the total wind mass and clump mass yield 0.5 and 15 M_solar inside a radius of 1' (0.1 pc). The individual clumps have masses and sizes of few x10^-3M_solar and 0.007 pc, respectively. We conclude that the central 0.1 pc region surrounding the BN-KL nebula in front of OMC-1 is in the process of being disrupted by the strong wind of IRc2 on a timescale of 2000 yr.

Affiliated with

Also associated with

No associations

Rating

Destruction of the Environment of the BN-KL Nebula 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 Destruction of the Environment of the BN-KL Nebula, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Destruction of the Environment of the BN-KL Nebula will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1028301