2008A&A...485..531G


Query : 2008A&A...485..531G

2008A&A...485..531G - Astronomy and Astrophysics, volume 485, 531-540 (2008/7-2)

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

GLAUSER A.M., MENARD F., PINTE C., DUCHENE G., GUEDEL M., MONIN J.-L. and PADGETT D.L.

Abstract (from CDS):

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 1.0-1.75x10–4M and an inclination of 62°-63°. The maximum grain size required to fit all available data is of the order of 1.6-2.8µm 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.

Abstract Copyright:

Journal keyword(s): stars: circumstellar matter - stars: pre-main-sequence - stars: individual: IRAS 04158+2805 - stars: formation - stars: planetary systems: protoplanetary discs

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 LDN 1495E Cl* 04 13 30.7 +28 19 15           ~ 32 0
2 V* V410 Tau Or* 04 18 31.1081296680 +28 27 16.155955728   12.13 10.75 8.45 9.408 K3Ve 444 0
3 V* V892 Tau Ae* 04 18 40.6157618376 +28 19 15.625058880   16.6 14.69 14.35   A0Ve 284 0
4 IRAS 04158+2805 Y*O 04 18 58.1336295120 +28 12 23.355499140           M5.25 96 0
5 V* V1213 Tau Or* 04 31 37.5055489536 +18 12 24.383952396           K7 546 0
6 V* HK Tau B TT* 04 31 50.6002481212 +24 24 15.502558869           ~ 78 0
7 V* HV Tau C TT* 04 38 35.5125950280 +26 10 41.316576204         14.90 K6 93 0
8 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4050 0
9 CD-32 15723 Er* 20 07 44.9749986917 -31 45 14.367216694 15.208 14.096 12.496 11.286 9.724 M4Ve 43 0
10 CD-30 17706 WD* 20 10 56.8486912016 -30 13 06.627142663 11.654 12.286 12.242 12.311 12.381 DA3.1 237 0

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2022.11.28-12:38:47

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