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Herschel observations of disks around late-type stars
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Tanner, Angelle M., Plavchan, Peter, Bryden, Geoff, Kennedy, Grant M., Matrá, Luca, Cronin-Coltsmann, Patrick, Lowrance, Patrick, Henry, Todd, Riaz, Basmah, Gizis, John E., Riedel, Adric and Choquet, Elodie (2020) Herschel observations of disks around late-type stars. Publications of the Astronomical Society of the Pacific, 132 (1014). 084401. doi:10.1088/1538-3873/ab895f
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WRAP-Herschel-observations-disks-late-type-stars-Kennedy-2020.pdf - Accepted Version - Requires a PDF viewer. Download (1186Kb) | Preview |
Official URL: http://dx.doi.org/10.1088/1538-3873/ab895f
Abstract
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: | Journal Article | |||||||||
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| Subjects: | Q Science > QB Astronomy | |||||||||
| Divisions: | Faculty of Science > Physics | |||||||||
| Library of Congress Subject Headings (LCSH): | Circumstellar matter, Stars -- Formation, Low mass stars , Disks (Astrophysics) | |||||||||
| Journal or Publication Title: | Publications of the Astronomical Society of the Pacific | |||||||||
| Publisher: | IOP Publishing | |||||||||
| ISSN: | 0004-6280 | |||||||||
| Official Date: | 16 June 2020 | |||||||||
| Dates: |
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| Volume: | 132 | |||||||||
| Number: | 1014 | |||||||||
| Article Number: | 084401 | |||||||||
| DOI: | 10.1088/1538-3873/ab895f | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Publisher Statement: | "This is an author-created, un-copyedited version of an article accepted for publication/published in Publications of the Astronomical Society of the Pacific. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at 10.1088/1538-3873/ab895f | |||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||
| Copyright Holders: | © 2020. The Astronomical Society of the Pacific | |||||||||
| RIOXX Funder/Project Grant: |
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| Open Access Version: |
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