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Optical and infrared observations of SU tau

Journal Article:

Abstract

The results of the narrow-band (with the resolution of 50-100A) and UBVJK photometry and optical linear polarimetry of SU Tau in 1974-1977 are given. The polarization observed is mainly an interstellar one. An estimation of A/sub V/ approximately equal to 1.3/sup m/-2,0/sub m/ for the interstellar absorption from polarization data leads to the absolute magnitude M/sub V/ approximately equal to - 3/sup m/ which is typical for the RCrB stars. Nearer to the light maximum the continuous spectrum of the star corresponds to that of a type not later than G1 supergiant. An excess of energy in the spectral region from 1.25 to 2.2 ..mu..m may be associated with 1000 K blackbody radiation of the dust. The decrease of the brightness of the star is apparently due to the shielding effect of a cloud of graphite particles with sizes of about 0.06 ..mu..m. The light reduced by 3/sup m/ needs a surface density of about 1.5x10/sup 10/ cm/sup -2/. The change of light is accompanied by complicated changes in color. The reddening is the most in the rising branch of light, which is also typical for other RCrB type stars.
Publication Date:
Feb 01, 1978
Product Type:
Journal Article
Reference Number:
AIX-10-443159; EDB-79-101724
Resource Relation:
Journal Name: Astrofizika; (USSR); Journal Volume: 14:1
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; VARIABLE STARS; PHOTOMETRY; POLARIZATION; ABSORPTION; BRIGHTNESS; ENERGY SPECTRA; INTERSTELLAR SPACE; NEAR INFRARED RADIATION; TIME DEPENDENCE; VISIBLE RADIATION; ELECTROMAGNETIC RADIATION; INFRARED RADIATION; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; RADIATIONS; SPACE; SPECTRA; STARS; 640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources
OSTI ID:
6130579
Country of Origin:
USSR
Language:
Russian
Other Identifying Numbers:
Journal ID: CODEN: ASTKB
Submitting Site:
INIS
Size:
Pages: 5-15
Announcement Date:

Journal Article:

Citation Formats

Doroshenko, V T, Efimov, Yu S, Rozenbush, A E, Terebizh, V Yu, Shenavrin, V I, AN SSSR, Crimea. Krymskaya Astrofizicheskaya Observatoriya, and AN Ukrainskoj SSR, Kiev. Glavnaya Astronomicheskaya Observatoriya). Optical and infrared observations of SU tau. USSR: N. p., 1978. Web.
Doroshenko, V T, Efimov, Yu S, Rozenbush, A E, Terebizh, V Yu, Shenavrin, V I, AN SSSR, Crimea. Krymskaya Astrofizicheskaya Observatoriya, & AN Ukrainskoj SSR, Kiev. Glavnaya Astronomicheskaya Observatoriya). Optical and infrared observations of SU tau. USSR.
Doroshenko, V T, Efimov, Yu S, Rozenbush, A E, Terebizh, V Yu, Shenavrin, V I, AN SSSR, Crimea. Krymskaya Astrofizicheskaya Observatoriya, and AN Ukrainskoj SSR, Kiev. Glavnaya Astronomicheskaya Observatoriya). 1978. "Optical and infrared observations of SU tau." USSR.
@misc{etde_6130579,
title = {Optical and infrared observations of SU tau}
author = {Doroshenko, V T, Efimov, Yu S, Rozenbush, A E, Terebizh, V Yu, Shenavrin, V I, AN SSSR, Crimea. Krymskaya Astrofizicheskaya Observatoriya, and AN Ukrainskoj SSR, Kiev. Glavnaya Astronomicheskaya Observatoriya)}
abstractNote = {The results of the narrow-band (with the resolution of 50-100A) and UBVJK photometry and optical linear polarimetry of SU Tau in 1974-1977 are given. The polarization observed is mainly an interstellar one. An estimation of A/sub V/ approximately equal to 1.3/sup m/-2,0/sub m/ for the interstellar absorption from polarization data leads to the absolute magnitude M/sub V/ approximately equal to - 3/sup m/ which is typical for the RCrB stars. Nearer to the light maximum the continuous spectrum of the star corresponds to that of a type not later than G1 supergiant. An excess of energy in the spectral region from 1.25 to 2.2 ..mu..m may be associated with 1000 K blackbody radiation of the dust. The decrease of the brightness of the star is apparently due to the shielding effect of a cloud of graphite particles with sizes of about 0.06 ..mu..m. The light reduced by 3/sup m/ needs a surface density of about 1.5x10/sup 10/ cm/sup -2/. The change of light is accompanied by complicated changes in color. The reddening is the most in the rising branch of light, which is also typical for other RCrB type stars.}
journal = {Astrofizika; (USSR)}
volume = {14:1}
journal type = {AC}
place = {USSR}
year = {1978}
month = {Feb}
}