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Multiwavelength studies of the gas and dust disc of IRAS 04158+2805

Glauser, A. M. and Ménard, F. and Pinte, C. and Duchêne, G. and Monin, J.-L. and Padgett, D. L. (2008) Multiwavelength studies of the gas and dust disc of IRAS 04158+2805. Astronomy and Astrophysics, 485 (2). pp. 531-540. ISSN 0004-6361. https://resolver.caltech.edu/CaltechAUTHORS:20090510-185103777

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Abstract

We present a study of the circumstellar environment of IRAS 04158+2805 based on multi-wavelength observations and models. Images in the optical and near-infrared, a polarisation map in the optical, and mid-infrared spectra were obtained with VLT-FORS1, CFHT-IR, and Spitzer-IRS. Additionally we used an X-ray spectrum observed with Chandra. We interpret the observations in terms of a central star surrounded by an axisymmetric circumstellar disc, but without an envelope, to test the validity of this simple geometry. We estimate the structural properties of the disc and its gas and dust content. We modelled the dust disc with a 3D continuum radiative transfer code, MCFOST, based on a Monte-Carlo method that provides synthetic scattered light images and polarisation maps, as well as spectral energy distributions. We find that the disc images and spectral energy distribution narrowly constrain many of the disc model parameters, such as a total dust mass of 1.0−1.75 × 10^-4 M☉ and an inclination of 62°−63°. The maximum grain size required to fit all available data is of the order of 1.6−2.8 μm although the upper end of this range is loosely constrained. The observed optical polarisation map is reproduced well by the same disc model, suggesting that the geometry we find is adequate and the optical properties are representative of the visible dust content. We compare the inferred dust column density to the gas column density derived from the X-ray spectrum and find a gas-to-dust ratio along the line of sight that is consistent with the ISM value. To our knowledge, this measurement is the first to directly compare dust and gas column densities in a protoplanetary disc.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1051/0004-6361:20065685DOIArticle
ORCID:
AuthorORCID
Pinte, C.0000-0001-5907-5179
Padgett, D. L.0000-0001-5334-5107
Additional Information:© ESO 2008. Received 24 May 2006. Accepted 14 April 2008. This work is based in part on archival data obtained with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided in part by an award issued by JPL/Caltech and in part by Programme National de Physique Stellaire (PNPS) of CNRS/INSU (France). We are grateful to Sylvain Bontemps for obtaining the CFHTIR images presented here and to Jérome Bouvier for performing their basic data reduction. The CXC X-ray Observatory Center is operated by the Smithsonian Astrophysical Observatory for and on behalf of the NASA under contract NAS8-03060.
Funders:
Funding AgencyGrant Number
JPLUNSPECIFIED
CaltechUNSPECIFIED
NASANAS8-03060
Subject Keywords:stars: circumstellar matter; stars: pre-main sequence; stars: individual: IRAS 04158+2805; stars: formation; stars: planetary systems: protoplanetary discs
Issue or Number:2
Record Number:CaltechAUTHORS:20090510-185103777
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20090510-185103777
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14189
Collection:CaltechAUTHORS
Deposited By: Joy Painter
Deposited On:25 Jun 2009 19:11
Last Modified:01 Nov 2019 17:09

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