A study of the Chamaeleon dark cloud and T-association. I - Extinction, distance and membership

Details A study of the Chamaeleon dark cloud and T-association. I - Extinction, distance and membership A study of the Chamaeleon dark cloud and T-association. I - Extinction, distance and membership

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.224..497w&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 224, Jan. 15, 1987, p. 497-512. SERC-supported research

Astronomy and Astrophysics

Astronomy

86

Dark Matter, Interstellar Extinction, Molecular Clouds, Star Distribution, Stellar Evolution, T Tauri Stars, Distance, Infrared Spectra, Stellar Spectrophotometry, Ubv Spectra

Scientific paper

The results of an observing program to investigate the nature and degree of reddening of a number of stars in the field towards the dark cloud and T-association in Chamaeleon are presented. The observations comprise optical (UBVRI) and infrared (JHK) photometry, and optical spectroscopy. New and previously published data are combined to assess membership criteria for 110 stars, and separate catalogues of association members and field stars are presented. Optical identifications are listed for 27 IRAS point sources in the region. The reddening/distance relation for field stars indicates a distance to the cloud of 140 + or - 12 pc. This result confirms that the extinction law is anomalous towards some stars in the cloud, notably the embedded A0 ZAMS star HD 97300, with values of up to 5.5 for the ratio of total-to-selective extinction. A comparison of 21-cm data with the reddening of background field stars indicates that the ratio N(H I)/E(B-V) is significantly less than the interstellar mean, indicating that most of the hydrogen in the cloud is molecular.

Affiliated with

Also associated with

No associations

Rating

A study of the Chamaeleon dark cloud and T-association. I - Extinction, distance and membership 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 A study of the Chamaeleon dark cloud and T-association. I - Extinction, distance and membership, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A study of the Chamaeleon dark cloud and T-association. I - Extinction, distance and membership will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1624051