Globules and pillars in Cygnus X. III. Herschel and upGREAT/SOFIA far-infrared spectroscopy of the globule IRAS 20319+3958 in Cygnus X
| dc.contributor.author | SCHNEIDER, N. | |
| dc.contributor.author | RÖLLIG, M. | |
| dc.contributor.author | POLEHAMPTON, E. T. | |
| dc.contributor.author | COMERÓN, F. | |
| dc.contributor.author | DJUPVIK, A. A. | |
| dc.contributor.author | MAKAI, Z. | |
| dc.contributor.author | BUCHBENDER, C. | |
| dc.contributor.author | SIMON, R. | |
| hal.structure.identifier | Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB] | |
| dc.contributor.author | BONTEMPS, S. | |
| dc.contributor.author | GÜSTEN, R. | |
| dc.contributor.author | WHITE, G. | |
| dc.contributor.author | OKADA, Y. | |
| dc.contributor.author | PARIKKA, A. | |
| dc.contributor.author | ROTHBART, N. | |
| dc.date.issued | 2021 | |
| dc.identifier.issn | 0004-6361 | |
| dc.description.abstractEn | IRAS 20319+3958 in Cygnus X South is a rare example of a free-floating globule (mass ~240 M<SUB>⊙</SUB>, length ~1.5 pc) with an internal H II region created by the stellar feedback of embedded intermediate-mass stars, in particular, one Herbig Be star. In Schneider et al. 2012, (A&A, 542, L18) and Djupvik et al. 2017, (A&A, 599, A37), we proposed that the emission of the far-infrared (FIR) lines of [C II] at 158 μm and [O I] at 145 μm in the globule head are mostly due to an internal photodissociation region (PDR). Here, we present a Herschel/HIFI [C II] 158 μm map of the whole globule and a large set of other FIR lines (mid-to high-J CO lines observed with Herschel/PACS and SPIRE, the [O I] 63 μm line and the <SUP>12</SUP>CO 16→15 line observed with upGREAT on SOFIA), covering the globule head and partly a position in the tail. The [C II] map revealed that the whole globule is probably rotating. Highly collimated, high-velocity [C II] emission is detected close to the Herbig Be star. We performed a PDR analysis using the KOSMA-τ PDR code for one position in the head and one in the tail. The observed FIR lines in the head can be reproduced with a two-component model: an extended, non-clumpy outer PDR shell and a clumpy, dense, and thin inner PDR layer, representing the interface between the H II region cavity and the external PDR. The modelled internal UV field of ~2500 G<SUB>°</SUB> is similar to what we obtained from the Herschel FIR fluxes, but lower than what we estimated from the census of the embedded stars. External illumination from the ~30 pc distant Cyg OB2 cluster, producing an UV field of ~150-600 G<SUB>°</SUB> as an upper limit, is responsible for most of the [C II] emission. For the tail, we modelled the emission with a non-clumpy component, exposed to a UV-field of around 140 G<SUB>°</SUB>. <P />The [C II] data shown in Figs. 4 and 5 (FITS files) are only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/653/A108">http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/653/A108</A> | |
| dc.description.sponsorship | GENeration et Evolution des Structures du milieu InterStellaire | |
| dc.language.iso | en | |
| dc.publisher | EDP Sciences | |
| dc.subject.en | ISM: atoms | |
| dc.subject.en | ISM: clouds | |
| dc.subject.en | HII regions | |
| dc.subject.en | photon-dominated region | |
| dc.subject.en | ISM: molecules | |
| dc.subject.en | ISM: kinematics and dynamics | |
| dc.subject.en | Astrophysics - Astrophysics of Galaxies | |
| dc.title.en | Globules and pillars in Cygnus X. III. Herschel and upGREAT/SOFIA far-infrared spectroscopy of the globule IRAS 20319+3958 in Cygnus X | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1051/0004-6361/202140824 | |
| dc.subject.hal | Planète et Univers [physics] | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph] | |
| dc.identifier.arxiv | 2108.10768 | |
| bordeaux.journal | Astronomy and Astrophysics - A&A | |
| bordeaux.volume | 653 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | insu-03678880 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//insu-03678880v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2021&rft.volume=653&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=SCHNEIDER,%20N.&R%C3%96LLIG,%20M.&POLEHAMPTON,%20E.%20T.&COMER%C3%93N,%20F.&DJUPVIK,%20A.%20A.&rft.genre=article |
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