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Herschel Observations of Disks around Late-type Stars

Tanner, Angelle and Plavchan, Peter and Bryden, Geoff and Kennedy, Grant and Matrà, Luca and Cronin-Coltsmann, Patrick and Lowrance, Patrick and Henry, Todd and Riaz, Basmah and Gizis, John E. and Riedel, Adric and Choquet, Élodie (2020) Herschel Observations of Disks around Late-type Stars. Publications of the Astronomical Society of the Pacific, 132 (1014). Art. No. 084401. ISSN 0004-6280. doi:10.1088/1538-3873/ab895f.

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A set of twenty late-type (K5-M5) stars were observed with the Herschel Space Observatory at 100 and 160 microns with the goal of searching for far-infrared excesses indicative of the presence of circumstellar disks. Out of this sample, four stars (TYC 7443-1102-1, TYC 9340-437-1, GJ 784 and GJ 707) have infrared excesses above their stellar photospheres at either 100 or 160 μm or both. At 100 microns TYC 9340-437-1 is spatially resolved with a shape that suggests it is surrounded by a face-on disk. The 100 μm excess flux associated with GJ 707 is marginal at around 3σ. The excess flux associated with GJ 784 is most likely due to a background galaxy as the dust radius estimated from the spectral energy fit implies that any associated dust disk should have been resolved in the Herschel images but is not. TYC 7443-1102-1 has been observed with ALMA which resolves the emission at its location into two distinct sources making the Herschel excess most likely also due to a background galaxy. It is worth noting that this star is in the 23 Myr old β Pic association. With a disk luminosity on the order of 10⁻³ L_*, this system is an ideal follow-up target for high-contrast imaging and ALMA.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Tanner, Angelle0000-0002-0786-7307
Plavchan, Peter0000-0002-8864-1667
Kennedy, Grant0000-0001-6831-7547
Matrà, Luca0000-0003-4705-3188
Lowrance, Patrick0000-0001-8014-0270
Henry, Todd0000-0002-9061-2865
Riaz, Basmah0000-0003-3863-4052
Gizis, John E.0000-0002-8916-1972
Riedel, Adric0000-0003-1645-8596
Choquet, Élodie0000-0002-9173-0740
Additional Information:© 2020. The Astronomical Society of the Pacific. Received 2019 October 23; accepted 2020 April 15; published 2020 June 16. We thank the anonymous referee for their insightful comments. Support for this work, as part of the NASA Herschel Science Center data analysis funding program, was provided by NASA through a contract issued by the Jet Propulsion Laboratory, California Institute of Technology to Mississippi State University. PACS has been developed by a consortium of institutes led by MPE (Germany) and including UVIE (Austria); KU Leuven, CSL, IMEC (Belgium); CEA, LAM (France); MPIA (Germany); INAF-IFSI/OAA/OAP/OAT, LENS, SISSA (Italy); IAC (Spain). This development has been supported by the funding agencies BMVIT (Austria), ESA-PRODEX (Belgium), CEA/CNES (France), DLR (Germany), ASI/INAF (Italy), and CICYT/MCYT (Spain). This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2011.0.01234.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ. This work has made use of data from the European Space Agency (ESA) mission Gaia (, processed by the Gaia Data Processing and Analysis Consortium (DPAC, Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. G.M.K. is supported by the Royal Society as a Royal Society University Research Fellow. This research made use of Astropy, a community-developed core Python package for Astronomy (Astropy Collaboration et al. 2013) as well as Matplotlib (Hunter 2007).
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Gaia Multilateral AgreementUNSPECIFIED
Issue or Number:1014
Record Number:CaltechAUTHORS:20200622-104137640
Persistent URL:
Official Citation:Angelle Tanner et al 2020 PASP 132 084401
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103954
Deposited By: George Porter
Deposited On:23 Jun 2020 15:15
Last Modified:16 Nov 2021 18:26

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