Dust temperatures in the circumstellar shell of TX Piscium

Journal Article · Thu Aug 01 04:00:00 EDT 1991 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/170358· OSTI ID:5225570

Wirsich, J

A suitable chromospheric model is used to study the interaction of the chromospheric UV radiation with the envelope of the cool carbon-rich star TX Psc. The temperature T(d) of the amorphous carbon grains as a function of the various locations in the internal layer of the circumstellar shell is calculated. The dust temperature decreases from T(d) = 1155 K at r = 2.25 R(stellar) to T(d) = 410 K at r = 30 R(stellar). The far-infrared flux is calculated and compared with observations of IRS data. The contribution of the dust heating by the chromosphere is low. The properties of the chromospheric model used here are discussed and compared with other semiempirical chromospheric models of TX Psc. Finally, the photodestruction rate of H2 illuminated by the chromospheric UV radiation field is determined, and it is concluded that H2 is photodestructed. 49 refs.

• OSTI ID: 5225570
• Journal Information: Astrophysical Journal; (United States), Journal Name: Astrophysical Journal; (United States) Vol. 377; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
CARBON STARS
COMPARATIVE EVALUATIONS
COSMIC DUST
DUSTS
ELECTROMAGNETIC RADIATION
EVALUATION
FAR INFRARED RADIATION
HEATING
INFRARED RADIATION
MAIN SEQUENCE STARS
MATHEMATICAL MODELS
RADIATIONS
STAR MODELS
STARS
STELLAR ATMOSPHERES
STELLAR CHROMOSPHERES
STELLAR RADIATION
TEMPERATURE MEASUREMENT
ULTRAVIOLET RADIATION