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The gas-dust transition region in young stellar objects: a sub-milli-arcsecond view through the eyes of CHARA

Tannirkulam, A. and Monnier, J. D. and Millan-Gabet, R. and Harries, T. J. and Pedretti, E. and Zhu, Z. and ten Brummelaar, T. A. (2008) The gas-dust transition region in young stellar objects: a sub-milli-arcsecond view through the eyes of CHARA. In: Optical and Infrared Interferometry. Proceedings of SPIE. No.7013. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 70130U. ISBN 9780819472236.

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Using the sub-milli-arcsecond resolution of the CHARA interferometer array and combining light with the 2-telescope combiner CHARA Classic, we have detected strong near-infrared (NIR) emission interior to the dust-sublimation radius of Herbig Ae stars MWC275 and AB Aur. The large contribution of this emission component, which we argue to be hot gas, to the total NIR spectral energy distribution (SED) is not predicted by current models of the dust evaporation front, indicating that the NIR disk is more complicated than expected. Furthermore, we demonstrate that the structure of the evaporation front in MWC275 is time variable, making single epoch, large uv coverage observations critical to decoding front geometry. With the commissioning of CHARA Michigan Phase Tracker in the summer of 2008, the Michigan Infrared Combiner (a 6 telescope combiner at CHARA) will become an ideal instrument for studying the evaporation front, achieving the required sensitivities to begin the first "true" interferometric imaging of the gas-dust transition region in young stellar objects (YSOs). Here, we summarize results on the evaporation front structure obtained with CHARA Classic and describe future prospects with CHARA MIRC in elucidating morphology of the gas-dust transition region.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Tannirkulam, A.0000-0002-9396-5551
Monnier, J. D.0000-0002-3380-3307
Millan-Gabet, R.0000-0003-0447-5866
ten Brummelaar, T. A.0000-0002-0114-7915
Additional Information:© 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). We acknowledge contributions from PJ Goldfinger, Christopher Farrington and Steve Golden. Research at the CHARA Array is supported by the National Science Foundation through grants AST 06-06958 and AST 03-52723 and by the Georgia State University through the offices of the Dean of the College of the Arts and Sciences and the Vice President for Research. This project was partially supported by NASA grant 050283. This publication makes use of NASA’s Astrophysics Data System Abstract Service. The calibrator sizes were obtained with the fBol module of getCal, a package made available by the Michelson Science Center, California Institute of Technology (
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
NSFAST 06-06958
Georgia State UniversityUNSPECIFIED
Subject Keywords:Stars: Planetary Systems: Protoplanetary Disks, Stars: Pre-Main-Sequence, Techniques: Interferometric, Radiative Transfer
Series Name:Proceedings of SPIE
Issue or Number:7013
Record Number:CaltechAUTHORS:20190715-101902828
Persistent URL:
Official Citation:A. Tannirkulam, J. D. Monnier, R. Millan-Gabet, T. J. Harries, E. Pedretti, Z. Zhu, and T. A. ten Brummelaar "The gas-dust transition region in young stellar objects: a sub-milli-arcsecond view through the eyes of CHARA", Proc. SPIE 7013, Optical and Infrared Interferometry, 70130U (28 July 2008);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97144
Deposited By: Tony Diaz
Deposited On:15 Jul 2019 17:39
Last Modified:03 Oct 2019 21:28

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