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Published December 20, 2018 | Published + Submitted
Journal Article Open

Probing the Inner Disk Emission of the Herbig Ae Stars HD 163296 and HD 190073

Abstract

The physical processes occurring within the inner few astronomical units of protoplanetary disks surrounding Herbig Ae stars are crucial to setting the environment in which the outer planet-forming disk evolves and put critical constraints on the processes of accretion and planet migration. We present the most complete published sample of high angular resolution H- and K-band observations of the stars HD 163296 and HD 190073, including 30 previously unpublished nights of observations of the former and 45 nights of the latter with the CHARA long-baseline interferometer, in addition to archival VLTI data. We confirm previous observations suggesting that significant near-infrared emission originates within the putative dust evaporation front of HD 163296 and show that this is the case for HD 190073 as well. The H- and K-band sizes are the same within (3 ± 3)% for HD 163296 and within (6 ± 10)% for HD 190073. The radial surface brightness profiles for both disks are remarkably Gaussian-like with little or no sign of the sharp edge expected for a dust evaporation front. Coupled with spectral energy distribution analysis, our direct measurements of the stellar flux component at the H and K bands suggest that HD 190073 is much younger (<400 kyr) and more massive (~5.6 M ⊙) than previously thought, mainly as a consequence of the new Gaia distance (891 pc).

Additional Information

© 2018. The American Astronomical Society. Received 2018 May 1; revised 2018 November 2; accepted 2018 November 5; published 2018 December 21. J.D.M. and B.R.S. acknowledge support from NSF-AST 1506540, and A.A. acknowledges support from NSF-AST 1311698. C.L.D., A.K., and S.K. acknowledge support from the ERC Starting Grant "ImagePlanetFormDiscs" (grant agreement no. 639889), STFC Rutherford fellowship/grant (ST/J004030/1, ST/K003445/1), and Philip Leverhulme Prize (PLP-2013-110). F.B. acknowledges support from NSF-AST 1210972 and 1445935. M.S. acknowledges support by the NASA Origins of Solar Systems grant NAG5-9475 and NASA Astrophysics Data Program contract NNH05CD30C. We thank William Danchi and Peter Tuthill for use of the previously unpublished Keck aperture masking data and also Paul Boley for his Python OIFITS module (available at https://github.com/pboley/oifits). The CHARA Array is supported by the National Science Foundation under grant nos. AST-1211929, AST-1636624, and AST-1715788. Institutional support has been provided from the GSU College of Arts and Sciences and the GSU Office of the Vice President for Research and Economic Development. This research has made use of the Jean-Marie Mariotti Center SearchCal (Chelli et al. 2016) service (available at http://www.jmmc.fr/searchcal), codeveloped by LAGRANGE and IPAG, and of CDS Astronomical Databases SIMBAD and VIZIER (available at http://cdsportal.u-strasbg.fr/). This work has made use of data from the European Space Agency (ESA) mission Gaia (Gaia Collaboration et al. 2016) (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This research has also made use of the SIMBAD database (Wenger et al. 2000), operated at CDS, Strasbourg, France, and NASA's Astrophysics Data System Bibliographic Services. Facilities: CHARA - Center for High Angular Resolution Astronomy interferometer, VLTI - The Very Large Telescope Interferometer, Keck - Software: SearchCal, amdlib, OIFITS.py, Bayestar17, PARSEC.

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Published - Setterholm_2018_ApJ_869_164.pdf

Submitted - 1811.03778.pdf

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Additional details

Created:
August 22, 2023
Modified:
October 19, 2023