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Discovery of an edge-on circumstellar debris disk around BD+45\circ598 : a newly identifed member of the β pictoris moving group
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(2021) Discovery of an edge-on circumstellar debris disk around BD+45\circ598 : a newly identifed member of the β pictoris moving group. The Astrophysical Journal, 912 (2). 115. doi:10.3847/1538-4357/abec6e ISSN 0004-637X.
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Official URL: https://doi.org/10.3847/1538-4357/abec6e
Abstract
We report the discovery of a circumstellar debris disk viewed nearly edge-on and associated with the young, K1 star BD+45° 598 using high-contrast imaging at 2.2 μm obtained at the W.M. Keck Observatory. We detect the disk in scattered light with a peak significance of ∼5σ over three epochs, and our best-fit model of the disk is an almost edge-on ∼70 au ring, with inclination angle ∼87°. Using the NOEMA interferometer at the Plateau de Bure Observatory operating at 1.3 mm, we find resolved continuum emission aligned with the ring structure seen in the 2.2 μm images. We estimate a fractional infrared luminosity of LIR/Ltot $\simeq \,{6}_{-1}^{+2}$ × 10−4, higher than that of the debris disk around AU Mic. Several characteristics of BD+45° 598, such as its galactic space motion, placement in a color–magnitude diagram, and strong presence of lithium, are all consistent with its membership in the β Pictoris Moving Group with an age of 23 ± 3 Myr. However, the galactic position for BD+45° 598 is slightly discrepant from previously known members of the β Pictoris Moving Group, possibly indicating an extension of members of this moving group to distances of at least 70 pc. BD+45° 598 appears to be an example from a population of young circumstellar debris systems associated with newly identified members of young moving groups that can be imaged in scattered light, key objects for mapping out the early evolution of planetary systems from ∼10–100 Myr. This target will also be ideal for northern-hemisphere, high-contrast imaging platforms to search for self-luminous, planetary mass companions residing in this system.
| Item Type: | Journal Article | ||||||||||||||||||
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| Subjects: | Q Science > QB Astronomy | ||||||||||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Disks (Astrophysics), Circumstellar matter, Extrasolar planets -- Detection | ||||||||||||||||||
| Journal or Publication Title: | The Astrophysical Journal | ||||||||||||||||||
| Publisher: | Institute of Physics Publishing, Inc. | ||||||||||||||||||
| ISSN: | 0004-637X | ||||||||||||||||||
| Official Date: | 11 May 2021 | ||||||||||||||||||
| Dates: |
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| Volume: | 912 | ||||||||||||||||||
| Number: | 2 | ||||||||||||||||||
| Article Number: | 115 | ||||||||||||||||||
| DOI: | 10.3847/1538-4357/abec6e | ||||||||||||||||||
| Institution: | University of Warwick | ||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||
| Reuse Statement (publisher, data, author rights): | "This is an author-created, un-copyedited version of an article accepted for publication in The Astrophysical Journal. 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 https://doi.org/10.3847/1538-4357/abec6e” | ||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||
| Copyright Holders: | © 2021. The American Astronomical Society. All rights reserved. | ||||||||||||||||||
| Date of first compliant deposit: | 5 May 2021 | ||||||||||||||||||
| Date of first compliant Open Access: | 11 May 2022 | ||||||||||||||||||
| RIOXX Funder/Project Grant: |
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