An APEX search for carbon emission from NGC 1977 proplyds
We used the Atacama Pathfinder Experiment (APEX) telescope to search for C I 1-0 (492.16 GHz) emission towards eight 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...
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| Hauptverfasser: | , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2022 March 14
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| In: |
Monthly notices of the Royal Astronomical Society
Year: 2022, Jahrgang: 512, Heft: 2, Pages: 2594-2603 |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/stac656 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/mnras/stac656
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| Verfasserangaben: | 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 and Giulia Ballabio |
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| 245 | 1 | 3 | |a An APEX search for carbon emission from NGC 1977 proplyds |c 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 and Giulia Ballabio |
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| 520 | |a We used the Atacama Pathfinder Experiment (APEX) telescope to search for C I 1-0 (492.16 GHz) emission towards eight 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 photo-evaporating discs. Of the eight 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 photo-evaporation of quite massive discs. By comparing both the proplyd mass loss rates and C I flux constraints with a large grid of external photo-evaporation 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. | ||
| 700 | 1 | |a Kim, Jinyoung S |e VerfasserIn |4 aut | |
| 700 | 1 | |a Qiao, Lin |e VerfasserIn |4 aut | |
| 700 | 1 | |a Winter, Andrew J. |e VerfasserIn |0 (DE-588)1205322086 |0 (DE-627)1690904445 |4 aut | |
| 700 | 1 | |a Williams, Jonathan P |e VerfasserIn |4 aut | |
| 700 | 1 | |a Clarke, Cathie J |e VerfasserIn |4 aut | |
| 700 | 1 | |a Owen, James E |e VerfasserIn |4 aut | |
| 700 | 1 | |a Facchini, Stefano |e VerfasserIn |4 aut | |
| 700 | 1 | |a Ansdell, Megan |e VerfasserIn |4 aut | |
| 700 | 1 | |a Kama, Mikhel |e VerfasserIn |4 aut | |
| 700 | 1 | |a Ballabio, Giulia |e VerfasserIn |4 aut | |
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