AB Aurigae resolved: Evidence for spiral structure

Stuartt Corder, Joshua A Eisner, Anneila Sargent

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

We have obtained high angular resolution (∼2″) images of the 13CO (J = 1 → 0) line and 2.7 mm continuum emission and slightly lower resolution images of 12CO (J→ 0) and C18O (J = 1 → 0) line emission toward the Herbig Ae star AB Aurigae. We resolve a circumstellar disk of diameter 780 AU (FWHM) with a velocity pattern consistent with a purely rotational disk at inclination 21°.5 and position angle 58°.6. Using Keplerian disk models, we find a central-source dynamical mass of 2.8 ±0.1 M and a cutoff radius of 615 AU for the 13CO emission. The inclination, mass, and radius determined from 12CO and C18O observations agree with these values, given optical depth and abundance effects. As a result of the high angular resolution of our observations, we confirm the existence of spiral structure suggested by near-infrared scattered-light images and show that the spiral arms represent density contrasts in the disk.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume622
Issue number2 II
DOIs
StatePublished - Apr 1 2005
Externally publishedYes

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angular resolution
inclination
image resolution
optical depth
radii
high resolution
near infrared
optical thickness
cut-off
continuums
stars
effect

Keywords

  • Circumstellar matter
  • Stars: individual (AB Aurigae)

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

AB Aurigae resolved : Evidence for spiral structure. / Corder, Stuartt; Eisner, Joshua A; Sargent, Anneila.

In: Astrophysical Journal, Vol. 622, No. 2 II, 01.04.2005.

Research output: Contribution to journalArticle

Corder, Stuartt ; Eisner, Joshua A ; Sargent, Anneila. / AB Aurigae resolved : Evidence for spiral structure. In: Astrophysical Journal. 2005 ; Vol. 622, No. 2 II.
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