HST and infrared images of the circumstellar environment of the cool hypergiant IRC+10420

Roberta M. Humphreys, Nathan Smith, Kris Davidson, Terry Jay Jones, Robert D. Gehrz, Christopher G. Mason, Thomas L. Hayward, James R. Houck, Joachim Krautter

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

We present HST WFPC2 and ground-based infrared images of the very evolved, luminous OH/IR star IRC+10420. The HST optical images reveal an amazingly complex environment, with one or more distant reflection shells probably ejected during the star's previous red supergiant stage plus numerous features within two arcseconds of the star including condensations arrayed in jet-like structures, rays, and an intriguing group of small, nearly spherical shell or arcs apparently at ends of some of the jet-like features. In contrast, the lower resolution infrared images show two lobes of emission coincident with some of the optical structures. We propose a nearly pole-on model for IRC+10420 with some bipolar symmetry and with the jet-like features, condensations, and arcs produced primarily in the equatorial region. We also present evidence that the mass loss rate has varied during the past few thousand years with a probable high mass loss event during the last 600 years.

Original languageEnglish (US)
Pages (from-to)2778-2788
Number of pages11
JournalAstronomical Journal
Volume114
Issue number6
StatePublished - Dec 1997
Externally publishedYes

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stars
condensation
arcs
shell
equatorial regions
spherical shells
lobes
symmetry
rays
poles
loss
rate

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Humphreys, R. M., Smith, N., Davidson, K., Jones, T. J., Gehrz, R. D., Mason, C. G., ... Krautter, J. (1997). HST and infrared images of the circumstellar environment of the cool hypergiant IRC+10420. Astronomical Journal, 114(6), 2778-2788.

HST and infrared images of the circumstellar environment of the cool hypergiant IRC+10420. / Humphreys, Roberta M.; Smith, Nathan; Davidson, Kris; Jones, Terry Jay; Gehrz, Robert D.; Mason, Christopher G.; Hayward, Thomas L.; Houck, James R.; Krautter, Joachim.

In: Astronomical Journal, Vol. 114, No. 6, 12.1997, p. 2778-2788.

Research output: Contribution to journalArticle

Humphreys, RM, Smith, N, Davidson, K, Jones, TJ, Gehrz, RD, Mason, CG, Hayward, TL, Houck, JR & Krautter, J 1997, 'HST and infrared images of the circumstellar environment of the cool hypergiant IRC+10420', Astronomical Journal, vol. 114, no. 6, pp. 2778-2788.
Humphreys RM, Smith N, Davidson K, Jones TJ, Gehrz RD, Mason CG et al. HST and infrared images of the circumstellar environment of the cool hypergiant IRC+10420. Astronomical Journal. 1997 Dec;114(6):2778-2788.
Humphreys, Roberta M. ; Smith, Nathan ; Davidson, Kris ; Jones, Terry Jay ; Gehrz, Robert D. ; Mason, Christopher G. ; Hayward, Thomas L. ; Houck, James R. ; Krautter, Joachim. / HST and infrared images of the circumstellar environment of the cool hypergiant IRC+10420. In: Astronomical Journal. 1997 ; Vol. 114, No. 6. pp. 2778-2788.
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