Stringent limits on the ionized mass loss from A and F dwarfs

Alexander Brown, Anthony Vealé, Philip Judge, Jay A. Bookbinder, Ivan - Hubeny

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Following the suggestion of Willson, Bowen, and Struck-Marcell that A- and F-type main-sequence stars might undergo significant mass loss due to pulsationally driven winds, we have obtained upper limits to the ionized mass loss from A and F dwarfs using VLA observations. These stringent upper limits show that the level of ionized mass loss would have at most only a small effect on stellar evolution. Radiative equilibrium atmospheric and wind models for early A dwarfs indicate that it is highly likely that a wind flowing from such stars would be significantly ionized. In addition, late A and early F dwarfs exhibit chromospheric emission indicative of significant nonradiative heating. Our mass-loss limits are thus representative of the total mass-loss rates for these stars. Therefore, we conclude that A and F dwarfs are not losing sufficient mass to cause A dwarfs to evolve into G dwarfs as has been proposed.

Original languageEnglish (US)
Pages (from-to)220-224
Number of pages5
JournalAstrophysical Journal
Volume361
Issue number1
StatePublished - Sep 20 1990
Externally publishedYes

Fingerprint

stars
atmospheric models
stellar evolution
main sequence stars
suggestion
loss
heating
causes
effect
rate

Keywords

  • Stars: evolution
  • Stars: mass loss
  • Stars: pulsation
  • Stars: radio radiation

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Brown, A., Vealé, A., Judge, P., Bookbinder, J. A., & Hubeny, I. . (1990). Stringent limits on the ionized mass loss from A and F dwarfs. Astrophysical Journal, 361(1), 220-224.

Stringent limits on the ionized mass loss from A and F dwarfs. / Brown, Alexander; Vealé, Anthony; Judge, Philip; Bookbinder, Jay A.; Hubeny, Ivan -.

In: Astrophysical Journal, Vol. 361, No. 1, 20.09.1990, p. 220-224.

Research output: Contribution to journalArticle

Brown, A, Vealé, A, Judge, P, Bookbinder, JA & Hubeny, I 1990, 'Stringent limits on the ionized mass loss from A and F dwarfs', Astrophysical Journal, vol. 361, no. 1, pp. 220-224.
Brown A, Vealé A, Judge P, Bookbinder JA, Hubeny I. Stringent limits on the ionized mass loss from A and F dwarfs. Astrophysical Journal. 1990 Sep 20;361(1):220-224.
Brown, Alexander ; Vealé, Anthony ; Judge, Philip ; Bookbinder, Jay A. ; Hubeny, Ivan -. / Stringent limits on the ionized mass loss from A and F dwarfs. In: Astrophysical Journal. 1990 ; Vol. 361, No. 1. pp. 220-224.
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