eprintid: 10192694
rev_number: 7
eprint_status: archive
userid: 699
dir: disk0/10/19/26/94
datestamp: 2024-05-22 15:37:52
lastmod: 2024-05-22 15:37:52
status_changed: 2024-05-22 15:37:52
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Girart, JM
creators_name: Estalella, R
creators_name: Viti, S
creators_name: Williams, DA
creators_name: Ho, PTP
title: Star formation signatures in the condensation  downstream of HH80N
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F60
keywords: Astronomy, formation, Star, Star Formation
note: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: HH80N is one of the Herbig-Haro objects that have associated quiescent dense
clumps. We report CO and CS BIMA observations that reveal star formation within
the HH80N dense clump. The CO emission reveals clearly a bipolar molecular
outflow centered on the dense clump. The CS emission traces a ring-like
structure of radius ~0.24 pc. The CS kinematics shows that the ring is
collapsing with an infall speed of ~0.6 km/s. The required mass to produce the
collapse is in agreement with previous ammonia observations of the 20 solar
mass core, which is embedded within the CS structure. However, we cannot
discard that the ring structure is expanding driven by protostellar winds, if
the CS abundance if unusually high and the CO momentum rate is much higher than
that measured, due to inclination and optical depth effects. The properties of
the molecular outflow and of the dense core suggest that it harbors a Class 0
object. There are also signatures of interaction of the HH 80/81/80N outflow
with the dense gas. In particular it is possible that the HH 80/81/80N outflow
has triggered or at least speed up the star formation in this region.
date: 2001
date_type: published
publisher: IOP PUBLISHING LTD
official_url: http://dx.doi.org/10.1086/337995
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 17934
doi: 10.1086/337995
lyricists_name: Williams, David
lyricists_name: Viti, Serena
lyricists_id: DAWIL42
lyricists_id: SVITI18
actors_name: Dewerpe, Marie
actors_id: MDDEW97
actors_role: owner
full_text_status: public
publication: The Astrophysical Journal
volume: 526
number: 1
pagerange: L91-L94
issn: 0004-637X
citation:        Girart, JM;    Estalella, R;    Viti, S;    Williams, DA;    Ho, PTP;      (2001)    Star formation signatures in the condensation downstream of HH80N.                   The Astrophysical Journal , 526  (1)   L91-L94.    10.1086/337995 <https://doi.org/10.1086/337995>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10192694/1/Williams_Girart_2001_ApJ_562_L91.pdf