Di Francesco, James ORCID: 0000-0002-9289-2450, Keown, Jared, Fallscheer, Cassandra, Andre, Philippe, Ladjelate, Bilal, Konyves, Vera, Men'shchikov, Alexander, Stephens-Whale, Shaun, Martin, Peter, Sadavoy, Sarah, Pezzuto, Stefano, Fiorellino, Eleonora, Benedettini, Milena, Schneider, Nicola, Bontemps, Sylvain, Arzoumanian, Doris, Palmeirim, Pedro, Kirk, Jason M. and Ward-Thompson, Derek (2020). Herschel Gould Belt Survey Observations of Dense Cores in the Cepheus Flare Clouds. Astrophys. J., 904 (2). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4357

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Abstract

We present Herschel SPIRE and PACS maps of the Cepheus Flare clouds L1157, L1172, L1228, L1241, and L1251, observed by the Herschel Gould Belt Survey of nearby star-forming molecular clouds. Through modified blackbody fits to the SPIRE and PACS data, we determine typical cloud column densities of (0.5-1.0) x 10(21) cm(-2) and typical cloud temperatures of 14-15 K. Using the getsources identification algorithm, we extract 832 dense cores from the SPIRE and PACS data at 160-500 mu m. From placement in a mass versus size diagram, we consider 303 to be candidate prestellar cores, and 178 of these to be robust prestellar cores. From an independent extraction of sources at 70 mu m, we consider 25 of the 832 dense cores to be protostellar. The distribution of background column densities coincident with candidate prestellar cores peaks at (2-4) x 10(21) cm(-2). About half of the candidate prestellar cores in Cepheus may have formed as a result of the widespread fragmentation expected to occur within filaments of transcritical line mass. The lognormal robust prestellar core mass function (CMF) drawn from all five Cepheus clouds peaks at 0.56 M and has a width of similar to 0.5 dex, similar to that of Aquila's CMF. Indeed, the width of Cepheus's aggregate CMF is similar to the stellar system initial mass function (IMF). The similarity of CMF widths in different clouds and the system IMF suggests a common, possibly turbulent origin for seeding the fluctuations that evolve into prestellar cores and stars.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Di Francesco, JamesUNSPECIFIEDorcid.org/0000-0002-9289-2450UNSPECIFIED
Keown, JaredUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fallscheer, CassandraUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Andre, PhilippeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ladjelate, BilalUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Konyves, VeraUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Men'shchikov, AlexanderUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stephens-Whale, ShaunUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Martin, PeterUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sadavoy, SarahUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pezzuto, StefanoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fiorellino, EleonoraUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Benedettini, MilenaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schneider, NicolaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bontemps, SylvainUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Arzoumanian, DorisUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Palmeirim, PedroUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kirk, Jason M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ward-Thompson, DerekUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-310223
DOI: 10.3847/1538-4357/abc016
Journal or Publication Title: Astrophys. J.
Volume: 904
Number: 2
Date: 2020
Publisher: IOP PUBLISHING LTD
Place of Publication: BRISTOL
ISSN: 1538-4357
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/31022

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