CaltechAUTHORS
Published May 2021 | Version Submitted + Published
Journal Article Open

Outbursting Young Stellar Object PGIR 20dci in the Perseus Arm

Creators

Abstract

We report the discovery of a likely outbursting Class I young stellar object, associated with the star-forming region NGC 281-W (distance ~2.8 kpc). The source is currently seen only at infrared wavelengths, appearing in both the Palomar Gattini InfraRed (1.2 μm) and the Near-Earth Object Wide-field Infrared Survey Explorer (3.4 and 4.6 μm) photometric time-domain surveys. Recent near-infrared imaging reveals a new, extended scattered light nebula. Recent near-infrared spectroscopy confirms the similarity of PGIR 20dci to FU Ori–type sources, based on strong molecular absorption in CO, H₂O, and OH; weak absorption in several atomic lines; and a warm wind/outflow as indicated by a P Cygni profile in the He I λ10830 line. This is a rare case of an FU Ori star with a well-measured long-term photometric rise before a sharper outburst, and the second instance of an FU Ori star with a documented two-step brightening in the mid-infrared.

Additional Information

© 2021. The American Astronomical Society. Received 2020 December 23; revised 2021 February 2; accepted 2021 February 5; published 2021 April 9. Palomar Gattini-IR (PGIR) is generously funded by Caltech, Australian National University, the Mt. Cuba Foundation, the Heising Simons Foundation, and the Bi-national Science Foundation. PGIR is a collaborative project among Caltech, Australian National University, University of New South Wales, Columbia University, and the Weizmann Institute of Science. M.M.K. acknowledges generous support from the David and Lucille Packard Foundation. Facilities: Palomar Gattini IR - , PO:1.2 m:ZTF - , PO:1.5 m:SEDM - , Hale:WIRC, Hale:TSPEC - , Keck/NIRES - , Keck/DEIMOS - , Spitzer - , WISE - , NEOWISE - , IRSA. -

Attached Files

Published - Hillenbrand_2021_AJ_161_220.pdf

Submitted - 2101.04203.pdf

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2101.04203.pdf

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Additional details

Identifiers

Eprint ID
107900
Resolver ID
CaltechAUTHORS:20210204-092654941

Related works

Describes
https://arxiv.org/abs/2101.04203 (URL)

Funding

Caltech
Australian National University
Mt. Cuba Astronomical Foundation
Heising-Simons Foundation
Binational Science Foundation (USA-Israel)
University of New South Wales
Columbia University
Weizmann Institute of Science
David and Lucile Packard Foundation

Dates

Created
2021-02-04
Created from EPrint's datestamp field
Updated
2021-04-23
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
Astronomy Department, Infrared Processing and Analysis Center (IPAC)