A dataset provided by the European Space Agency

Name OT1_mdunham_1
Title Understanding the Protostellar Mass Accretion Process: Herschel 100-500 micron Photometry of Low Luminosity Embedded Protostars
URL

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DOI 10.5270/esa-8u9u3xq
Author dunham, m.
Description Spitzer Space Telescope surveys of nearby, low-mass star-forming regions have discovered a new class of very low luminosity objects (VeLLOs), protostars embedded within dense cores with luminosities less than or equal to 0.1 Lsun. VeLLOs represent the extreme low end of the protostellar luminosity distribution, which is comprised mainly of sources below about 1 Lsun. The standard model of star formation, which predicts a mass accretion rate constant with time, is inconsistent with such a large population of low luminosity embedded protostars, leading numerous recent authors to suggest that mass accretion is variable and-or episodic in nature. Further constraints on this mass accretion process require far-IR and submm data to fill in the gap between existing Spitzer mid-IR and ground-based millimeter continuum data. We propose to obtain Herschel PACS and SPIRE 100-500 micron photometry of 24 confirmed and candidate embedded protostars with L < 1.0 Lsun. With these data, we will: (1) calculate accurate evolutionary indicators, (2) provide essential inputs for source models that seek to constrain the properties of both the protostars and the dense cores in which they are embedded, and (3) confirm or reject candidates that have not been conclusively shown to be embedded protostars. The proposed observations will provide crucial data for further understanding the protostellar luminosity distribution and mass accretion process for a very modest (6.0 hours) allocation of observing time.
Publication Intensity-corrected HerschelÂxa0 Observations of Nearby Isolated Low-mass Clouds . Sadavoy Sarah I. et al. . The Astrophysical Journal, Volume 852, Issue 2, article id. 102, 26 pp. (2018). . 852 . 10.3847\/1538-4357\/aaa080 . 2018ApJ...852..102S ,
Instrument PACS_PacsPhoto_largeScan, SPIRE_SpirePhoto_large
Temporal Coverage 2011-05-05T23:41:52Z/2012-03-24T09:55:13Z
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 µm range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/herschel/
Date Published 2012-09-24T09:51:40Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2012-09-24T09:51:40Z, OT1_mdunham_1, SPG v14.2.0. https://doi.org/10.5270/esa-8u9u3xq