Near infrared photometry of some RS CVn systems and candidates

Details Near infrared photometry of some RS CVn systems and candidates Near infrared photometry of some RS CVn systems and candidates

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..97..161v&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 97, no. 1, Nov. 1983, p. 161-169.

Astronomy and Astrophysics

Astronomy

17

Astronomical Photometry, Binary Stars, Infrared Astronomy, Infrared Photometry, Stellar Spectrophotometry, Astronomical Catalogs, Reference Stars, Spectral Bands, Stellar Magnitude

Scientific paper

Infrared observations in the J, H, and K bands were made on eleven RS CVn systems. Infrared (IR) excess ⪆0.3 mag in the J, H, and K bands was observed from the three systems UX Ari, HR 1099 and σ CrB. Similar observations were also made on the RS CVn candidates HD 26354, 39937, 42449, 51268, and 86005. The IR excess in the RS CVn systems for which near infrared photometric data are available is found to be correlated with the maximum of optical wave amplitude of these systems. The observed excess cannot be explained on the basis of a single process such as: (1) emission from cool spots on the photosphere; (2) free-free emission from an optically thin circumstellar plasma; or (3) dust grain emission from circumstellar material.

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