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Author
dc.contributor.author
Malinen, J 
Author
dc.contributor.author
Juvela, M 
Author
dc.contributor.author
Zahorecz, S 
Author
dc.contributor.author
Rivera-Ingraham, A 
Author
dc.contributor.author
Montillaud, J 
Author
dc.contributor.author
Arimatsu, K 
Author
dc.contributor.author
Bernard, J-P 
Author
dc.contributor.author
Doi, Y 
Author
dc.contributor.author
Haikala, LK 
Author
dc.contributor.author
Kawabe, R 
Availability Date
dc.date.accessioned
2020-08-10T10:14:01Z
Availability Date
dc.date.available
2020-08-10T10:14:01Z
Release
dc.date.issued
2014
uri
dc.identifier.uri
http://hdl.handle.net/10831/48672
Abstract
dc.description.abstract
Context. L1642 is one of the two high galactic latitude (|b| > 30°) clouds confirmed to have active star formation. Aims. We examine the properties of this cloud, especially the large-scale structure, dust properties, and compact sources at different stages of star formation. Methods. We present high-resolution far-infrared and submillimetre observations with the Herschel and AKARI satellites and millimetre observations with the AzTEC/ASTE telescope, which we combined with archive data from near- and mid-infrared (2MASS, WISE) to millimetre wavelength observations (Planck). Results. The Herschel observations, combined with other data, show a sequence of objects from a cold clump to young stellar objects (YSOs) at different evolutionary stages. Source B-3 (2MASS J04351455-1414468) appears to be a YSO forming inside the L1642 cloud, instead of a foreground brown dwarf, as previously classified. Herschel data reveal striation in the diffuse dust emission around the cloud L1642. The western region shows striation towards the NE and has a steeper column density gradient on its southern side. The densest central region has a bow-shock like structure showing compression from the west and has a filamentary tail extending towards the east. The differences suggest that these may be spatially distinct structures, aligned only in projection. We derive values of the dust emission cross-section per H nucleon of σe(250 μm) = 0.5-1.5 × 10-25 cm2/H for different regions of the cloud. Modified black-body fits to the spectral energy distribution of Herschel and Planck data give emissivity spectral index β values 1.8-2.0 for the different regions. The compact sources have lower β values and show an anticorrelation between T and β. Conclusions. Markov chain Monte Carlo calculations demonstrate the strong anticorrelation between β and T errors and the importance of millimetre wavelength Planck data in constraining the estimates. L1642 reveals a more complex structure and sequence of star formation than previously known. © ESO, 2014.
Language
dc.language
Angol
Title
dc.title
Multiwavelength study of the high-latitude cloud L1642: Chain of star formation
Type
dc.type
folyóiratcikk
Date Change
dc.date.updated
2020-05-29T08:48:26Z
Note
dc.description.note
Megjegyzés-24964239 http://cdsads.u-strasbg.fr/cgi-bin/nph-data_query? bibcode=2014A%26A...563A.125M&link_type=ARTICLE&db_key=AST&high= Megjegyzés-24964283 http://dx.doi.org/10.1051/0004-6361/201323026
Doi ID
dc.identifier.doi
10.1051/0004-6361/201323026
Wos ID
dc.identifier.wos
000333798000125
ID Scopus
dc.identifier.scopus
84897989924
MTMT ID
dc.identifier.mtmt
2582931
abbreviated journal
dc.identifier.jabbrev
ASTRON ASTROPHYS
Journal
dc.identifier.jtitle
ASTRONOMY & ASTROPHYSICS
Volume Number
dc.identifier.volume
563
Release Date
dc.description.issuedate
2014
department of Author
dc.contributor.institution
Konkoly Thege Miklós Csillagászati Intézet
department of Author
dc.contributor.institution
Csillagászati Tanszék
department of Author
dc.contributor.institution
Fizika Doktori Iskola
Author institution
dc.contributor.department
Csillagászati Tanszék
Author institution
dc.contributor.department
Konkoly Thege Miklós Csillagászati Intézet
Author institution
dc.contributor.department
Csillagászati Tanszék


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Multiwavelength study of the high-latitude cloud L1642: Chain of star formation
 

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