dc.creator | Castellanos, Pablo | |
dc.creator | Casassus Montero, Simón | |
dc.creator | Dickinson, Clive | |
dc.creator | Vidal, Matías | |
dc.creator | Paladini, Roberta | |
dc.creator | Cleary, Kieran | |
dc.creator | Davies, Rodney D. | |
dc.creator | Davis, Richard J. | |
dc.creator | White, Glenn J. | |
dc.creator | Taylor, Angela C. | |
dc.date.accessioned | 2011-10-20T18:39:13Z | |
dc.date.accessioned | 2019-04-25T23:49:59Z | |
dc.date.available | 2011-10-20T18:39:13Z | |
dc.date.available | 2019-04-25T23:49:59Z | |
dc.date.created | 2011-10-20T18:39:13Z | |
dc.date.issued | 2011-02 | |
dc.identifier | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Volume: 411 Issue: 2 Pages: 1137-1150 Published: FEB 2011 | |
dc.identifier | 0035-8711 | |
dc.identifier | DOI: 10.1111/j.1365-2966.2010.17743.x | |
dc.identifier | http://repositorio.uchile.cl/handle/2250/125492 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/2429819 | |
dc.description.abstract | An anomalous radio continuum component at cm-wavelengths has been observed in
various sources, including dark clouds. This continuum component represents a new
property of the ISM. In this work we focus on one particular dark cloud, the bright
re
ection nebula M 78. The main goal of this work is to investigate the cm-wave
continuum emission in a prominent molecular cloud, nearby and with complementary
observational data. We acquired Cosmic Background Imager (CBI) visibility data of
M 78 at 31 GHz with an angular resolution of 5:80, and CBI2 data at an angular
resolution of 4:20. A morphological analysis was undertaken to search for possible
correlations with templates that trace di erent emission mechanisms. Using data from
WMAP and the Rhodes/HartRAO 2326 MHz survey we constructed the spectral en-
ergy distribution (SED) of M 78 in a 450 circular aperture. We used results from the
literature to constrain the physical conditions and the stellar content. The 5 GHz {
31 GHz spectral index in
ux density ( = 1:89 0:15) is signi cantly di erent from
optically thin-free-free values. We also nd closer morphological agreement with IR
dust tracers than with free-free sources. Dust-correlated cm-wave emission that is not
due to free-free is signi cant at small scales (CBI resolutions). However, a free-free
background dominates at cm-wavelengths on large scales ( 1 deg). We correct for
this uniform background by di erencing against a set of reference elds. The di er-
enced SED of M 78 shows excess emission at 10-70 GHz over free-free and a modi ed
blackbody, at 3.4 . The excess is matched by the spinning dust model from Draine
& Lazarian (1998). | |
dc.language | en | |
dc.publisher | WILEY-BLACKWELL | |
dc.subject | radiation mechanisms: general | |
dc.title | Dust-correlated centimetre-wave radiation from the M78 reflection nebula | |
dc.type | Artículos de revistas | |