Investigation of previously derived Hyades, Coma, and M67 reddenings

Journal Article · Sat Mar 01 04:00:00 EST 1980 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/112669· OSTI ID:5461204

Taylor, B J

New Hyades polarimetry and field star photometry have been obtained to check the Hyades reddening, which was found to be nonzero in a previous paper. The new Hyades polarimetry implies essentially zero reddening; this is also true of polarimetry published by Behr (which was incorrectly interpreted in the previous paper). Four photometric techniques which are presumed to be insensitive to blanketing are used to compare the Hyades to nearby field stars; these four techniques also yield essentially zero reddening. When all of these results are combined with others which the author has previously published and a simultaneous solution for the Hyades, Coma, and M67 reddenings is made, the results are E (B-V) =3 +- 2 (sigma) mmag, -1 +- 3 (sigma) mmag, and 46 +- 6 (sigma) mmag, respectively. No support for a nonzero Hyades reddening is offered by the new results. When the newly obtained reddenings for the Hyades, Coma, and M67 are compared with results from techniques given by Crawford and by users of the David Dunlap Observatory photometric system, no differences between the new and other reddenings are found which are larger than about 2 sigma. The author had previously found that the M67 main-sequence stars have about the same blanketing as that of Coma and less blanketing than the Hyades; this conclusion is essentially unchanged by the revised reddenings.

• Research Organization: NASA-Ames Research Center, Moffett Field, California 94035
• OSTI ID: 5461204
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 85:3; ISSN ANJOA
• Country of Publication: United States
• Language: English

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640102 -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
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640105* -- Astrophysics & Cosmology-- Galaxies
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INTERSTELLAR GRAINS
INTERSTELLAR SPACE
MAIN SEQUENCE STARS
PARTICLES
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POLARIZATION
SPACE
STAR CLUSTERS
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