A dataset provided by the European Space Agency

Name OT2_landerso_1
Title Tracing Galactic Metallicity with Herschel
URL

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DOI 10.5270/esa-vo31nuv
Author anderson, l.
Description Galactic abundances trace the processing of primordial elements by stars from the birth of the Milky Way to the present day. HII regions, because of their short lifetimes, are ideal targets for abundance determinations because they sample the current state of the interstellar medium. We propose to observe the [OIII], [NIII], and [NII] lines of 31 well-studied Galactic HII regions with the PACS spectrometer to derive the oxygen and nitrogen abundances. We hope to address two long-standing problems in Galactic abundance measurements: 1) abundances traced in the far-infrared show discrepancies with those in the optical, and 2) HII region electron temperatures derived from radio observations, which can be used as a proxy for metallicity, are not well calibrated with abundance measurements.
Publication
Instrument PACS_PacsLineSpec_point
Temporal Coverage 2013-03-21T16:25:47Z/2013-04-11T14:25:06Z
Version SPG v14.2.0
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 2013-10-11T13:57:41Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013-10-11T13:57:41Z, OT2_landerso_1, SPG v14.2.0. https://doi.org/10.5270/esa-vo31nuv