The Near-Infrared Size-Luminosity Relations for Herbig Ae/Be Disks

doi:10.1086/429266

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The Astrophysical Journal Volume 624 Number 2 Create an alert RSS this journal

J. D. Monnier et al. 2005 ApJ 624 832 doi:10.1086/429266

The Near-Infrared Size-Luminosity Relations for Herbig Ae/Be Disks

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J. D. Monnier¹, R. Millan-Gabet², R. Billmeier¹, R. L. Akeson², D. Wallace³, J.-P. Berger⁴, N. Calvet⁵, P. D'Alessio⁶, W. C. Danchi³, L. Hartmann⁵, L. A. Hillenbrand⁷, M. Kuchner⁸, J. Rajagopal³, W. A. Traub⁵, P. G. Tuthill⁹, A. Boden², A. Booth¹⁰, M. Colavita¹⁰, J. Gathright¹¹, M. Hrynevych¹¹, D. Le Mignant¹¹, R. Ligon¹⁰, C. Neyman¹¹, M. Swain¹⁰, R. Thompson², G. Vasisht¹⁰, P. Wizinowich¹¹, C. Beichman², J. Beletic¹¹, M. Creech-Eakman¹⁰, C. Koresko², A. Sargent², M. Shao¹⁰ and G. van Belle²

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monnier@umich.edu

¹ University of Michigan Astronomy Department, 941 Dennison Building, Ann Arbor, MI 48109-1090
² Michelson Science Center, California Institute of Technology, 770 South Wilson Avenue, Pasadena, CA 91125
³ NASA Goddard Space Flight Center
⁴ Laboratoire d'Astrophysique de Grenoble, 414 Rue de la Piscine, 38400 Saint Martin d'Heres, France
⁵ Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138
⁶ Universidad Nacional Autónoma de México
⁷ Astronomy Department, California Institute of Technology, Pasadena, CA
⁸ Princeton University, Princeton, NJ
⁹ Physics Department, University of Sydney, Australia
¹⁰ Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109
¹¹ W. M. Keck Observatory, California Association for Research in Astronomy, 65-1120 Mamalahoa Highway, Kamuela, HI 96743

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Abstract References Cited By

We report the results of a sensitive K-band survey of Herbig Ae/Be disk sizes using the 85 m baseline Keck Interferometer. Targets were chosen to span the maximum range of stellar properties to probe the disk size dependence on luminosity and effective temperature. For most targets, the measured near-infrared sizes (ranging from 0.2 to 4 AU) support a simple disk model possessing a central optically thin (dust-free) cavity, ringed by hot dust emitting at the expected sublimation temperatures (T_s ~1000-1500 K). Furthermore, we find a tight correlation of disk size with source luminosity R vprop L^1/2 for Ae and late Be systems (valid over more than two decades in luminosity), confirming earlier suggestions based on lower quality data. Interestingly, the inferred dust-free inner cavities of the highest luminosity sources (Herbig B0-B3 stars) are undersized compared to predictions of the "optically thin cavity" model, likely because of optically thick gas within the inner AU.

An Erratum for this article has been published in 2005 ApJ 632 689

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