Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...236..371m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 236, no. 2, Sept. 1990, p. 371-377.
Astronomy and Astrophysics
Astrophysics
4
Globular Clusters, Interstellar Extinction, Optical Polarization, Polarimetry, Stellar Radiation, Abundance, Metallicity, Stellar Spectrophotometry, X Ray Spectra
Scientific paper
Polarization observations of a sample of 39 stars distributed uniformly in an annulus 5 to 6 arcmin from the center of the peculiar galactic globular cluster M 22. Twenty three stars show polarization above the 3-sigma level, and they are concentrated preferentially at the southeast of the cluster center. Some possible explanations for this polarization are discussed, apparently excluding the possibility of an intracluster cloud or stellar origin. The most likely explanation is that the cluster lies partially beyond an interstellar galactic cloud. From the amount of polarization, an average differential reddening of about E(B-V) greater than 0.03 is inferred, the SE portion being more obscured than the rest of the cluster. The metal abundances previously derived by high dispersion spectroscopic techniques could have been affected by such a reddening distribution.
Coyne George V.
Tapia Saul
~Minniti Dante
No associations
LandOfFree
Interstellar polarization in the field of the globular cluster M 22 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 Interstellar polarization in the field of the globular cluster M 22, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interstellar polarization in the field of the globular cluster M 22 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1399919