Near-infrared interferometric measurements of herbig Ae/Be stars

J. A. Eisner, B. F. Lane, R. L. Akeson, L. A. Hillenbrand, A. I. Sargent

Research output: Contribution to journalArticle

83 Scopus citations

Abstract

We have observed the Herbig Ae/Be sources AB Aur, VV Ser, V1685 Cyg (BD +40°4124), AS 442, and MWC 1080 with the Palomar Testbed Interferometer, obtaining the longest baseline near-IR interferometric observations of this class of objects. All of the sources are resolved at 2.2 μm with angular size scales generally ≲5 mas, consistent with the only previous near-IR interferometric measurements of Herbig Ae/Be stars, by Millan-Gabet and collaborators. We determine the angular size scales and orientations predicted by uniform-disk, Gaussian, ring, and accretion disk models. Although it is difficult to distinguish different radial distributions, we are able to place firm constraints on the inclinations of these models, and our measurements are the first that show evidence for significantly inclined morphologies. In addition, the derived angular sizes for the early-type Herbig Be stars in our sample, V1685 Cyg and MWC 1080, agree reasonably well with those predicted by the face-on accretion disk models used by Hillenbrand and collaborators to explain observed spectral energy distributions. In contrast, our data for the later-type sources AB Aur, VV Ser, and AS 442 are somewhat inconsistent with these models and may be explained better through the puffed-up inner disk models of Dullemond and collaborators.

Original languageEnglish (US)
Pages (from-to)360-372
Number of pages13
JournalAstrophysical Journal
Volume588
Issue number1 I
DOIs
StatePublished - May 1 2003
Externally publishedYes

Keywords

  • Infrared: stars
  • Stars: emission-line, Be
  • Stars: individual (AB Aurigae, AS 442, MWC 1080, V1685 Cygni, VV Serpentis)
  • Stars: pre-main-sequence
  • Techniques: high angular resolution

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Eisner, J. A., Lane, B. F., Akeson, R. L., Hillenbrand, L. A., & Sargent, A. I. (2003). Near-infrared interferometric measurements of herbig Ae/Be stars. Astrophysical Journal, 588(1 I), 360-372. https://doi.org/10.1086/373923