The Near-Infrared Size-Luminosity Relations for Herbig Ae/Be Disks
| Autor: | M. Shao, M. Hrynevych, G. T. van Belle, Paola D'Alessio, John D. Monnier, J. Beletic, Jean-Philippe Berger, M. Mark Colavita, Michelle Creech-Eakman, C. Beichman, Mark R. Swain, D. Wallace, Peter Wizinowich, R. R. Thompson, Marc J. Kuchner, A. Booth, Gautam Vasisht, William C. Danchi, Nuria Calvet, A. Sargent, Rachel Akeson, Lynne A. Hillenbrand, J. Gathright, Wesley A. Traub, A. Boden, C. Koresko, R. Billmeier, J. Rajagopal, Lee Hartmann, R. Ligon, Peter G. Tuthill, D. Le Mignant, Chris Neyman, Rafael Millan-Gabet |
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| Přispěvatelé: | Laboratoire d'Astrophysique de Grenoble (LAOG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
Physics
010308 nuclear & particles physics Near-infrared spectroscopy Astrophysics (astro-ph) FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Effective temperature 01 natural sciences Stars Interferometry Disk size Space and Planetary Science 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Sublimation (phase transition) Astrophysics::Earth and Planetary Astrophysics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | The Astrophysical Journal The Astrophysical Journal, American Astronomical Society, 2005, 624, pp.832-840. ⟨10.1086/429266⟩ |
| ISSN: | 0004-637X 1538-4357 |
| Popis: | 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_sub~1000-1500K). Furthermore, we find a tight correlation of disk size with source luminosity R propto L^(1/2) for Ae and late Be systems (valid over more than 2 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 under-sized compared to predictions of the optically-thin cavity model, likely due to optically-thick gas within the inner AU. Accepted by Astrophysical Journal; 24 pages, 4 figures, 4 tables |
| Databáze: | OpenAIRE |
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