Discovery of two new HCN maser lines in five carbon stars

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

A survey with the Heinrich Hertz Submillimeter Telescope of HCN emission from mass-losing carbon stars has revealed masers in the J = 3-2 and 4-3 transitions of the (011c0) vibrational bending mode. These lines have not previously been known to show maser action. Five stars - R Scl, V384 Per, R Lep, Y CVn, and V Cyg - out of 12 observed were detected as masers. Allowing for evidence of variability, this detection rate suggests that these HCN lines are masers at least some of the time in the majority of mass-losing carbon stars. The line widths and velocities imply that the maser action occurs in gas close to the star, where the circumstellar envelope is just being accelerated outward.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume549
Issue number1 PART 2
DOIs
StatePublished - Mar 1 2001

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carbon stars
masers
carbon
stars
gas
envelopes
telescopes
gases
rate
detection

Keywords

  • Masers
  • Molecular processes
  • Radio lines: Stars
  • Stars: Carbon
  • Stars: Mass loss

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Discovery of two new HCN maser lines in five carbon stars. / Bieging, John H.

In: Astrophysical Journal, Vol. 549, No. 1 PART 2, 01.03.2001.

Research output: Contribution to journalArticle

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KW - Stars: Mass loss

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