Eight-colour photometry of stars associated with selected Sharpless H II regions at L exp II of about 190 deg - S 252, S 254, S 255, S 257, and S 261

Details Eight-colour photometry of stars associated with selected Sharpless H II regions at L exp II of about 190 deg - S 252, S 254, S 255, S 257, and S 261 Eight-colour photometry of stars associated with selected Sharpless H II regions at L exp II of about 190 deg - S 252, S 254, S 255, S 257, and S 261

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...171..216c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 171, no. 1-2, Jan. 1987, p. 216-224. Research supported by the Universidad Nac

Astronomy and Astrophysics

Astrophysics

19

Galactic Clusters, H Ii Regions, Infrared Spectra, Stellar Color, Stellar Spectrophotometry, Visible Spectrum, Distance, Early Stars, Interstellar Extinction, Pre-Main Sequence Stars, Spectrum Analysis

Scientific paper

We present optical intermediate band photometry in the 13 colour system of selected stars associated with the Sharpless H II regions S 252, S 254, S 255, S 261, and with the diffuse H II region and small galactic cluster NGC 2175s. We also give near infrared photometry of a few stars associated with S 252. We find that LSV + 20° 20 is an infrared source, with a dusty envelope of Td 950 K. The photometric data was used to derive MK spectral types of selected stars embedded in the H II regions, and of the most likely exciting stars of the radio sources S 252 A, B, C, and E. From our data and supplementary data from the literature we also obtain the reddening law for these H II regions, and estimate the distances to S 252, NGC 2l75s, S 254-S 257, and S 261 to be 2.3 ± 0.1, 1.9 ± 0.2, and 1.0 ± 0.2 Kpc, respectively. CCD imagery in the I passband revealed a small cluster of ≃ 21 stars in the bright reflection knot of S 252 (the "Christbaumhaeufchen"), where at least one of its members (S 252b) is a pre-main sequence star. We briefly comment on the interstellar extinction law, and its effect in the photometric MK classification discussed here.

Affiliated with

Also associated with

No associations

Rating

Eight-colour photometry of stars associated with selected Sharpless H II regions at L exp II of about 190 deg - S 252, S 254, S 255, S 257, and S 261 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 Eight-colour photometry of stars associated with selected Sharpless H II regions at L exp II of about 190 deg - S 252, S 254, S 255, S 257, and S 261, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Eight-colour photometry of stars associated with selected Sharpless H II regions at L exp II of about 190 deg - S 252, S 254, S 255, S 257, and S 261 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1621332