Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984afz....20..495p&link_type=abstract
(Astrofizika, vol. 20, May-June 1984, p. 495-502) Astrophysics (ISSN 0571-7132), vol. 20, no. 3, Nov. 1984, p. 266-272. Translat
Astronomy and Astrophysics
Astrophysics
Astronomical Photometry, Colorimetry, Nebulae, Astronomical Photography, Stellar Evolution
Scientific paper
The results of a colorimetric investigation of the diffuse nebulas S 156, S 157A, S 158, and NGC 7635, which are excited by O stars, are presented. The nebulas S 156, S 157A, and NGC 7635 are very bright in U due to the presence in them of strong ultraviolet doublet forbidden O II 3727 A. These values correspond effectively to the monochromatic image of the nebulas at this wavelength. The measurements show that the B-V color index does not change significantly with distance from the star except for S 158, where a weak dependence is observed. The results indicate that the physical properties of these nebulas differ little. It is concluded that the gas masses in this association are remnants of star formation that have a common origin with the stars. The age of the association is estimated at 100,000-1,000,000 yr.
Parsamian Elma S.
Petrosian V. M.
No associations
LandOfFree
Colorimetry of the diffuse nebulas S 156, S 157A, S 158, and NGC 7635 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 Colorimetry of the diffuse nebulas S 156, S 157A, S 158, and NGC 7635, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Colorimetry of the diffuse nebulas S 156, S 157A, S 158, and NGC 7635 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1367548