Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.233..899y&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 233, Aug. 15, 1988, p. 899-905. SERC-MOESC-supported re
Astronomy and Astrophysics
Astronomy
7
H Ii Regions, Infrared Sources (Astronomy), Molecular Clouds, Reflection Nebulae, Star Formation, Thermal Emission, Near Infrared Radiation, Spatial Distribution
Scientific paper
A new infrared reflection nebula is identified in the W75N region. The K-band polarization map shows a centrosymmetric pattern of the vectors extending over a region 2 arcmin in size, with large values of degrees of polarization, up to 50 per cent. The illuminating source is identified with the ultracompact H II region W75N(B) which is located at the center of polarization pattern. The intensity peak, IRS-1, is not a self-luminous source but is rather a bright knot in the reflection nebula. The northern peak, IRS-4, located on a second ultracompact H II region, W75N(A), extends for more than 30 arcsec and is less polarized (5-10 percent). The near-infrared light of IRS-4 is attributed to thermal emission from small (about 10 A) dust grains. The different polarization and spatial distribution of the near-infrared emission around these two ultracompact H II regions are explained by the different dust densities around them, probably due to their different evolutionary stages.
Gatley Ian
Hough James H.
Moore Justin Tatch
Mountain Charles M.
Sato Sasumu
No associations
LandOfFree
Infrared reflection nebula in W75N 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 Infrared reflection nebula in W75N, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Infrared reflection nebula in W75N will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1695249