Issue |
A&A
Volume 418, Number 2, May I 2004
|
|
---|---|---|
Page(s) | 607 - 616 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361:20040056 | |
Published online | 09 April 2004 |
The circumstellar environment of IRAS 16293–2422
ISO–LWS and SCUBA observations
1
Departamento de Física, Faculdade de Ciências da Univ. de Lisboa, Campo Grande, 1749 - 016 Lisboa, Portugal
2
Department of Physics and Astronomy, Queens Buildings, Cardiff University, PO Box 913, 5 The Parade, Cardiff CF24 3YB, UK e-mail: matt.griffin@astro.cf.ac.uk
3
CNR - Istituto di Fisica dello Spazio Interplanetario, via Fosso del Cavaliere, 00133 Roma, Italy e-mail: saraceno@lupus.ifsi.rm.cnr.it
Corresponding author: J. C. Correia, jcc@fc.ul.pt
Received:
19
August
1999
Accepted:
14
January
2004
We present far-infrared (FIR) continuum observations of the deeply embedded source
IRAS 16293–2422 performed with the Long Wavelength Spectrometer (LWS) on-board
the Infrared Space Observatory (ISO). We also report 450 and 850 μm
mapping observations done with the Submillimetre Common–User Bolometer Array (SCUBA) at the
James Clerk Maxwell Telescope (JCMT). We combined these observations with IRAS and other JCMT data
available in the literature to construct a complete spectral energy
distribution (SED) of the source. A spherically symmetric dusty envelope model was used to
reproduce the SED and to characterize the circumstellar matter around the object. We call
attention to the fact that when using models such as the one presented here, one needs
spatial information about the object to distinguish between different possible fits to the SED. A comparison between the intensity profiles at 450 and 850 μm obtained from the SCUBA observations
and the profiles predicted by the model allowed us to constrain the size of the envelope and its density
distribution. The SED and the 850 μm intensity profile of the source are consistent
with a centrally peaked power law dust density distribution of the form with
, with a radius
AU, defining a very compact circumstellar
envelope. We estimate a bolometric luminosity
, an envelope mass
, and a submillimetre to bolometric luminosity ratio
, confirming that the source shows a submillimetre excess characteristic of Class 0
sources.
Key words: ISM: individual objects: IRAS 16293–2422 / infrared: ISM / stars: circumstellar matter
© ESO, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.