Multicolour photometry of stars in the Ophiuchus dark cloud region

Details Multicolour photometry of stars in the Ophiuchus dark cloud region Multicolour photometry of stars in the Ophiuchus dark cloud region

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....99..346c&link_type=abstract

Astronomy and Astrophysics, vol. 99, no. 2, June 1981, p. 346-350.

Astronomy and Astrophysics

Astronomy

99

Early Stars, Electrophotometry, Interstellar Matter, Nebulae, Stellar Spectrophotometry, Colorimetry, Giant Stars, Infrared Astronomy, T Tauri Stars, Ubv Spectra

Scientific paper

A photoelectric investigation of the stars embedded in the Ophiuchus dark cloud region is described, confirming recent star formation in the dust complex. The spectral types of these young stellar objects were found to range from B2 V to G2 V. Additionally, a large number of T Tauri-like variables was observed, indicating that a substantial fraction of newly formed stars within the cloud has not yet reached the main sequence. The photometric distance of the association is 165 plus or minus 20 pc and part of the observed stars are background G, K, and M giants shining through the outer parts of the cloud. Based on A (V) values, it is suggested that the total amount of extinction throughout the cloud must be considerably higher than 13 mag.

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