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