Large dust grains in the dark cloud B5

Details Large dust grains in the dark cloud B5 Large dust grains in the dark cloud B5

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.222..383b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 222, Sept. 15, 1986, p. 383-391.

Astronomy and Astrophysics

Astronomy

12

Grain Size, Molecular Clouds, Polarimetry, Stellar Spectra, Distance, Infrared Astronomy Satellite, Interstellar Extinction, Linear Polarization, Stellar Spectrophotometry, Temporal Distribution

Scientific paper

Polarization measurements of stars in the region of the dark cloud B5 indicate that the average dust grain size in the cloud is much larger than the mean interstellar grain size. Within the cloud, the average grain size is found to increase with decreasing distance from the cloud core where IRAS detected a compact infrared source IRS 1. Dust grains with an average size as large as about twice the mean size of the interstellar grains could be present in the inner regions of the cloud. It is suggested that dust grains in B5 grew in size by the accretion of condensable heavy elements from the gas on a time-scale of ≡106yr, and gravitational segregation of the larger grains towards the cloud core on a longer time-scale (≡3×107yr) caused the observed radial variation in grain size and the lower than expected extinction in the region outside the core.

Affiliated with

Also associated with

No associations

Rating

Large dust grains in the dark cloud B5 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 Large dust grains in the dark cloud B5, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large dust grains in the dark cloud B5 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1296534