Artículo
Carma Large Area Star Formation Survey: observational analysis of filaments in the serpens south molecular cloud
Fernandez Lopez, Manuel
; Arce, H. G.; Looney, Leslie W.; Mundy, Lee G.; Storm, S.; Teuben, P. J. ; Lee, K.; Segura Cox, Dominique M.; Isella, A.; Tobin, John J.; Rosolowsky, E.; Plunkett, A. ; Kwon, Woojin; Kauffmann, J.; Ostriker, E. ; Tassis, K.; Shirley, Y. L.; Pound, M.
Fecha de publicación:
08/2014
Editorial:
Iop Publishing
Revista:
Astrophysical Journal
ISSN:
0004-637X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We present the N2H+ (J = 1 → 0) map of the Serpens South molecular cloud obtained as part of the CARMA Large Area Star Formation Survey. The observations cover 250 arcmin2 and fully sample structures from 3000 AU
to 3 pc with a velocity resolution of 0.16 km s−1, and they can be used to constrain the origin and evolution of molecular cloud filaments. The spatial distribution of the N2H+ emission is characterized by long filaments that resemble those observed in the dust continuum emission by Herschel. However, the gas filaments are typically
narrower such that, in some cases, two or three quasi-parallel N2H+ filaments comprise a single observed dust continuum filament. The difference between the dust and gas filament widths casts doubt on Herschel ability to resolve the Serpens South filaments. Some molecular filaments show velocity gradients along their major axis, and two are characterized by a steep velocity gradient in the direction perpendicular to the filament axis. The observed velocity gradient along one of these filaments was previously postulated as evidence for mass infall toward the
central cluster, but these kind of gradients can be interpreted as projection of large-scale turbulence.
Palabras clave:
Filaments
,
Interstellar Medium
,
Star Formation
Archivos asociados
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Articulos(IAR)
Articulos de INST.ARG.DE RADIOASTRONOMIA (I)
Articulos de INST.ARG.DE RADIOASTRONOMIA (I)
Citación
Fernandez Lopez, Manuel; Arce, H. G.; Looney, Leslie W.; Mundy, Lee G.; Storm, S.; et al.; Carma Large Area Star Formation Survey: observational analysis of filaments in the serpens south molecular cloud; Iop Publishing; Astrophysical Journal; 790; 2; 8-2014; L19
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