A dataset provided by the European Space Agency

Name OT2_dwatso02_5
Title HIFI and SPIRE spectroscopy of HOPS 87: a bright water-rich protostar without an outflow


DOI 10.5270/esa-gaqyuym
Author watson, d.
Description We propose to use Herschel HIFI and SPIRE to observe emission lines of water and CO in a low-mass Class 0 protostar, HOPS 87 (a.k.a. OMC-3 MMS 6N), for which we have characterized the water emission spectrum extensively with Spitzer-IRS and Herschel-PACS. HOPS 87 is the most luminous source of water emission lines found in a survey of low-mass YSOs, but has very little other emission that could be taken as evidence of a high-velocity outflow; if it truly lacks such an outflow at present it provides a rare opportunity to examine emission from the infalling envelope and potentially the envelope-disk accretion shock. With HIFI spectra we will determine whether or not the water emission arises in a high-velocity outflow, and detect separately the kinematic signatures of the warm inner envelope, the outflow-cavity walls, and perhaps the envelope-disk accretion flow. Confirmation of the detection of dense water in the disk accretion flow, which has been suggested as the origin of the mid-infrared (20-40~micron ) water emission, would be the first unambiguous detection of this flow and is a major goal of this proposal. With SPIRE spectra we will complete our Spitzer-IRS and Herschel-PACS census of water and CO emission in this object, thereby obtaining a particularly complete and detailed account of physical conditions in the HOPS 87 envelope.
Instrument HIFI_HifiPoint_dbs
Temporal Coverage 2012-08-16T12:25:04Z/2012-09-28T22:55:03Z
Version SPG v14.1.0
Mission Description Herschel was launched on 14 May 2009! It is the fourth 'cornerstone' mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 ┬Ám range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/herschel/
Date Published 2013-03-28T22:00:28Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013-03-28T22:00:28Z, OT2_dwatso02_5, SPG v14.1.0. https://doi.org/10.5270/esa-gaqyuym