L
Lee Hartmann
Researcher at University of Michigan
Publications - 590
Citations - 60559
Lee Hartmann is an academic researcher from University of Michigan. The author has contributed to research in topics: Stars & T Tauri star. The author has an hindex of 134, co-authored 579 publications receiving 57649 citations. Previous affiliations of Lee Hartmann include University of Hawaii & National Science Foundation.
Papers
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Journal ArticleDOI
Disk evolution and the fate of water
Abstract: We review the general theoretical concepts and observational constraints on the distribution and evolution of water vapor and ice in protoplanetary disks, with a focus on the Solar System. Water is expected to freeze out at distances greater than 1-3 AU from solar-type central stars; more precise estimates are difficult to obtain due to uncertainties in the complex processes involved in disk evolution, including dust growth, settling, and radial drift, and the level of turbulence and viscous dissipation within disks. Interferometric observations are now providing constraints on the positions of CO snow lines, but extrapolation to the unresolved regions where water ice sublimates will require much better theoretical understanding of mass and angular momentum transport in disks as well as more refined comparison of observations with sophisticated disk models.
Journal ArticleDOI
Deuterated methanol toward NGC 7538-IRS1
J. Ospina-Zamudio,Cécile Favre,Marina Kounkel,Li-Hong Xu,Justin L. Neill,Bertrand Lefloch,Alexandre Faure,Edwin A. Bergin,Davide Fedele,Lee Hartmann +9 more
TL;DR: In this paper, the authors investigated the deuteration of methanol towards the high-mass star-forming region NGC 7538-IRS 1.4 mm with the IRAM-30 m antenna.
Journal ArticleDOI
The near-infrared size-luminosity relations for Herbig Ae/Be disks
John D. Monnier,Rafael Millan-Gabet,R. Billmeier,Rachel Akeson,D. Wallace,Jean-Philippe Berger,Nuria Calvet,Paola D'Alessio,William C. Danchi,Lee Hartmann,Lynne A. Hillenbrand,Marc J. Kuchner,J. Rajagopal,Wesley A. Traub,Peter G. Tuthill,A. Boden,A. Booth,M. Mark Colavita,J. Gathright,M. Hrynevych,D. Le Mignant,R. Ligon,Chris Neyman,Mark R. Swain,R. R. Thompson,Gautam Vasisht,Peter Wizinowich,C. Beichman,J. Beletic,Michelle Creech-Eakman,C. Koresko,A. Sargent,M. Shao,G. T. van Belle +33 more
TL;DR: In this paper, the authors report the results of a sensitive K-band survey of Herbig Ae/Be disk sizes using the 85m baseline Keck Interferometer, and find a tight correlation of disk size with source luminosity R propto L^(1/2) for Ae and late Be systems.
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Predicted Colors and Flux Densities of Protostars in the Herschel PACS and SPIRE Filters
Babar Ali,John J. Tobin,William J. Fischer,Charles A. Poteet,S. T. Megeath,Lori E. Allen,Lee Hartmann,Nuria Calvet,Elise Furlan,Mayra Osorio +9 more
TL;DR: In this article, the color and luminosity diagnostics based on Herschel broad-band filters were investigated to identify and discern the properties of low-mass protostars, and they found that Herschel data alone is likely a useful diagnostic of the envelope properties of young stars.