2013A&A...550A..50M


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.23CEST06:08:35

2013A&A...550A..50M - Astronomy and Astrophysics, volume 550A, 50-50 (2013/2-1)

Ionisation impact of high-mass stars on interstellar filaments. A Herschel study of the RCW 36 bipolar nebula in Vela C.

MINIER V., TREMBLIN P., HILL T., MOTTE F., ANDRE P., LO N., SCHNEIDER N., AUDIT E., WHITE G.J., HENNEMANN M., CUNNINGHAM M., DEHARVENG L., DIDELON P., DI FRANCESCO J., ELIA D., GIANNINI T., NGUYEN LUONG Q., PEZZUTO S., RYGL K.L.J., SPINOGLIO L., WARD-THOMPSON D. and ZAVAGNO A.

Abstract (from CDS):

Ionising stars reshape their original molecular cloud and impact star formation, leading to spectacular morphologies such as bipolar nebulae around HII regions. Molecular clouds are structured in filaments where stars principally form, as revealed by the Herschel space observatory. The prominent southern hemisphere HII region, RCW36, is one of these bipolar nebulae. We study the physical connection between the filamentary structures of the Vela C molecular cloud and the bipolar morphology of RCW36, providing an in-depth view of the interplay occurring between ionisation and interstellar structures (bright-rims and pillars) around an HII region. We have compared Herschel observations in five far-infrared and submillimetre filters with the PACS and SPIRE imagers, to dedicated numerical simulations and molecular line mapping. Our results suggest that the RCW36 bipolar morphology is a natural evolution of its filamentary beginnings under the impact of ionisation. Such results demonstrate that, filamentary structures can be the location of very dynamical phenomena inducing the formation of dense clumps at the edge of HII regions. Moreover, these results could apply to better understanding the bipolar nebulae as a consequence of the expansion of an HII region within a molecular ridge or an interstellar filament.

Abstract Copyright:

Journal keyword(s): ISM: individual objects: RCW 36 - ISM: individual objects: Vela C - ISM: structure - stars: massive - hydrodynamics - HII regions

Simbad objects: 13

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Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 * alf UMi cC* 02 31 49.09456 +89 15 50.7923 3.00 2.62 2.02 1.53 1.22 F8Ib 601 2
2 SH 2-201 HII 03 03 17.9 +60 27 52           ~ 109 0
3 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1057 1
4 NAME Vela XYZ Rad 08 34.0 -45 50           ~ 1088 2
5 IRAS 08438-4340 * 08 45 35.8 -43 51 02           G3III 24 1
6 NAME Vela C Cld 08 57 -43.2           ~ 111 0
7 RCW 36 HII 08 59 00.9 -43 44 10     15.20     ~ 123 0
8 NGC 3576 HII 11 11 49.8 -61 18 14           ~ 222 2
9 LBN 061.50+00.29 HII 19 46 45.7 +25 12 56           ~ 62 0
10 SH 2-106 HII 20 27 26.8 +37 22 49           ~ 406 2
11 GRS G081.70 +00.50 SFR 20 39 01.6 +42 19 38           O4.5 928 0
12 IC 5146 SFR 21 53 24 +47 16.0   7.82 7.2     ~ 374 2
13 NAME Aql Region reg ~ ~           ~ 282 0

    Equat.    Gal    SGal    Ecl

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2019.10.23-06:08:35

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