Imaging the Surface of Altair-Reference-Cited by-同舟云学术

Imaging the Surface of Altair

Published:2007-07-20 Issue:5836 Volume:317 Page:342-345
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Monnier John D.¹²³⁴⁵,Zhao M.¹²³⁴⁵,Pedretti E.¹²³⁴⁵,Thureau N.¹²³⁴⁵,Ireland M.¹²³⁴⁵,Muirhead P.¹²³⁴⁵,Berger J.-P.¹²³⁴⁵,Millan-Gabet R.¹²³⁴⁵,Van Belle G.¹²³⁴⁵,ten Brummelaar T.¹²³⁴⁵,McAlister H.¹²³⁴⁵,Ridgway S.¹²³⁴⁵,Turner N.¹²³⁴⁵,Sturmann L.¹²³⁴⁵,Sturmann J.¹²³⁴⁵,Berger D.¹²³⁴⁵

Affiliation:

1. Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA.

2. School of Physics and Astronomy, University of St. Andrews, Fife KY16 9AJ, Scotland, UK.

3. Astrophysics Group, Covendish Laboratory, Cambridge University, Cambridge CB3 0HA, UK.

4. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA.

5. Astronomy Department, Cornell University, Ithaca, NY 14850, USA.

Abstract

Spatially resolving the surfaces of nearby stars promises to advance our knowledge of stellar physics. Using optical long-baseline interferometry, we constructed a near-infrared image of the rapidly rotating hot star Altair with a resolution of <1 milliarcsecond. The image clearly reveals the strong effect of gravity darkening on the highly distorted stellar photosphere. Standard models for a uniformly rotating star cannot explain our findings, which appear to result from differential rotation, alternative gravity-darkening laws, or both.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference34 articles.

1. The Evolution of Rotating Stars

2. Magnetic fields at the surfaces of stars

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4. Mass and Angular Momentum Transfer in the Massive Algol Binary RY Persei

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