Please use this identifier to cite or link to this item: http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1930
AzTEC 1.1 mm OBSERVATIONS OF THE MBM12 MOLECULAR CLOUD
Itziar Aretxaga
David Hughes
Andrew Humphrey
Acceso Abierto
Atribución-NoComercial-SinDerivadas
Galaxies: high-redshift
ISM: molecules
Stars: pre-main sequence
Stars: protostars
Submillimeter: galaxies
Submillimeter: stars
We present 1.1 mm observations of the dust continuum emission from the MBM12 high-latitude molecular cloud observed with the Astronomical Thermal Emission Camera (AzTEC) mounted on the James Clerk Maxwell Telescope on Mauna Kea, Hawaii. We surveyed 6.34 deg² centered on MBM12, making this the largest área that has ever been surveyed in this region with submillimeter and millimeter telescopes. Eight secure individual sources were detected with a signal-to-noise ratio of over 4.4. These eight AzTEC sources can be considered to be real astronomical objects compared to the other candidates based on calculations of the false detection rate. The distribution of the detected 1.1 mm sources or compact 1.1 mm peaks is spatially anti-correlated with that of the 100μm emission and the ¹²CO emission.We detected the 1.1 mm dust continuum emitting sources associated with two classical T Tauri stars, LkHα262 and LkHα264. Observations of spectral energy distributions (SEDs) indicate that LkHα262 is likely to be Class II (pre-main-sequence star), but there are also indications that it could be a late Class I (protostar). A flared disk and a bipolar cavity in the models of Class I sources lead to more complicated SEDs. From the present AzTEC observations of the MBM12 region, it appears that other sources detected with AzTEC are likely to be extragalactic and located behind MBM12. Some of these have radio counterparts and their star formation rates are derived from a fit of the SEDs to the photometric evolution of galaxies in which the effects of a dusty interstellar medium have been included.
The Astrophysical Journal
10-02-2012
Artículo
Inglés
Estudiantes
Investigadores
Público en general
Kim, M. J., et al., (2012), AzTEC 1.1 mm OBSERVATIONS OF THE MBM12 MOLECULAR CLOUD, The Astrophysical Journal, Vol. 746(11):1-8
ASTRONOMÍA Y ASTROFÍSICA
Versión aceptada
acceptedVersion - Versión aceptada
Appears in Collections:Artículos de Astrofísica

Upload archives


File SizeFormat 
18_Artxaga_2012_ApJ746-11.pdf1.17 MBAdobe PDFView/Open