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Imaging the Surface of Altair

Monnier, John D. and Zhao, M. and Pedretti, E. and Thureau, N. and Ireland, M. and Muirhead, P. and Berger, J.-P. and Millan-Gabet, R. and van Belle, G. and ten Brummelaar, T. and McAlister, H. and Ridgway, S. and Turner, N. and Sturmann, L. and Sturmann, J. and Berger, D. (2007) Imaging the Surface of Altair. Science, 317 (5836). pp. 342-345. ISSN 0036-8075. doi:10.1126/science.1143205.

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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.

Item Type:Article
Related URLs:
URLURL TypeDescription Information Paper
Monnier, John D.0000-0002-3380-3307
Zhao, M.0000-0002-4258-9517
Ireland, M.0000-0002-6194-043X
Muirhead, P.0000-0002-0638-8822
Berger, J.-P.0000-0001-5025-0428
Millan-Gabet, R.0000-0003-0447-5866
van Belle, G.0000-0002-8552-158X
ten Brummelaar, T.0000-0002-0114-7915
Turner, N.0000-0001-8292-1943
Additional Information:© 2007 American Association for the Advancement of Science. Received 29 March 2007; accepted 23 May 2007; Published online 31 May 2007. We thank A. Tannirkulam, S. Webster, A. Boden, B. Zavala, C. Tycner, C. Hummel, D. Peterson, J. Aufdenberg, PJ Goldfinger, and S. Golden for their contributions. Research at the CHARA Array is supported by NSF grants AST 06-06958 and AST 03-52723 and by the offices of the Dean of the College of the Arts and Sciences and the Vice President for Research, Georgia State University.
Funding AgencyGrant Number
NSFAST 06-06958
NSFAST 03-52723
Georgia State UniversityUNSPECIFIED
Issue or Number:5836
Record Number:CaltechAUTHORS:20141118-083723788
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51881
Deposited By: Tony Diaz
Deposited On:18 Nov 2014 16:54
Last Modified:10 Nov 2021 19:17

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