Unusual infrared line profiles in the post-asymptotic giant branch star HD 56126

Journal Article · Sat Sep 01 00:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/185803· OSTI ID:6335074

Kwok, S; Hrivnak, B J; Geballe, T R ^[1]

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1. Joint Institute for Laboratory Astrophysics, Boulder, CO (USA) Valparaiso Univ., IN (USA) Joint Astronomy Centre, Hilo, HI (USA)

Brackett series lines with very broad inverted P Cygni and shell-like profiles have been detected toward the post-AGB star HD 56126. These profiles suggest that an active phase of mass loss has begun recently in this star. The star has had at least one previous episode of intense mass loss, attested to by its strong far-infrared emission. HD 56126 is also known for having a broad emission feature at 21 microns. The unidentified emission bands at 3.3 and 3.4 microns are also present in the spectrum of HD 56126, but the near-infrared spectrum provides little help in establishing the carrier of the 21 microns band. 22 refs.

• OSTI ID: 6335074
• Journal Information: Astrophysical Journal; (USA), Vol. 360; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
STARS
INFRARED SPECTRA
MASS TRANSFER
EMISSION SPECTRA
ENERGY SPECTRA
HYDROGEN
PLANETARY NEBULAE
RED SHIFT
SPECTROPHOTOMETRY
STAR EVOLUTION
ELEMENTS
NEBULAE
NONMETALS
SPECTRA
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources