An APEX search for carbon emission from NGC 1977 proplyds
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
We used the Atacama Pathfinder Experiment (APEX) telescope to search for C I 1-0 (492.16 GHz) emission towards 8 proplyds in NGC 1977, which is an FUV radiation environment two orders of magnitude weaker than that irradiating the Orion Nebular Cluster (ONC) proplyds. C I is expected to enable us to probe the wind launching region of externally photoevaporating discs. Of the 8 targets observed, no 3σ detections of the C I line were made despite reaching sensitivities deeper than the anticipated requirement for detection from prior APEX CI observations of nearby discs and models of external photoevaporation of quite massive discs. By comparing both the proplyd mass loss rates and C I flux constraints with a large grid of external photoevaporation simulations, we determine that the non-detections are in fact fully consistent with the models if the proplyd discs are very low mass. Deeper observations in C I and probes of the disc mass with other tracers (e.g. in the continuum and CO) can test this. If such a test finds higher masses, this would imply carbon depletion in the outer disc, as has been proposed for other discs with surprisingly low C I fluxes, though more massive discs would also be incompatible with models that can explain the observed mass loss rates and C I non-detections. The expected remaining lifetimes of the proplyds are estimated to be similar to those of proplyds in the ONC at 0.1 Myr. Rapid destruction of discs is therefore also a feature of common, intermediate UV environments.
Date Issued
2022-05-01
Date Acceptance
2022-03-01
Citation
Monthly Notices of the Royal Astronomical Society, 2022, 512 (2), pp.2594-2603
ISSN
0035-8711
Publisher
Oxford University Press (OUP)
Start Page
2594
End Page
2603
Journal / Book Title
Monthly Notices of the Royal Astronomical Society
Volume
512
Issue
2
Copyright Statement
© 2022 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model). This is a pre-copy-editing, author-produced version of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated version Thomas J Haworth, Jinyoung S Kim, Lin Qiao, Andrew J Winter, Jonathan P Williams, Cathie J Clarke, James E Owen, Stefano Facchini, Megan Ansdell, Mikhel Kama, Giulia Ballabio, An APEX search for carbon emission from NGC 1977 proplyds, Monthly Notices of the Royal Astronomical Society, 2022;, stac656 is available online at: https://doi.org/10.1093/mnras/stac656
This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model). This is a pre-copy-editing, author-produced version of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated version Thomas J Haworth, Jinyoung S Kim, Lin Qiao, Andrew J Winter, Jonathan P Williams, Cathie J Clarke, James E Owen, Stefano Facchini, Megan Ansdell, Mikhel Kama, Giulia Ballabio, An APEX search for carbon emission from NGC 1977 proplyds, Monthly Notices of the Royal Astronomical Society, 2022;, stac656 is available online at: https://doi.org/10.1093/mnras/stac656
Sponsor
The Royal Society
Commission of the European Communities
Identifier
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stac656/6548131
Grant Number
UF150412
853022
Subjects
Science & Technology
Physical Sciences
Astronomy & Astrophysics
accretion
accretion discs
planets and satellites: formation
protoplanetary discs
circumstellar matter
ORION NEBULA CLUSTER
EXTERNAL PHOTOEVAPORATION
PROTOPLANETARY DISKS
CIRCUMSTELLAR DISKS
MASS-LOSS
STAR-FORMATION
DISCS
RADIATION
STELLAR
ALMA
Astronomy & Astrophysics
0201 Astronomical and Space Sciences
Publication Status
Published
Date Publish Online
2022-03-14