New 13CO observations towards the Keplerian gaseous disk around R Mon

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dc.creatorAlonso-Albi, T.
dc.creatorFuente, A.
dc.creatorBachiller, R.
dc.creatorNatta, A.
dc.creatorTesti, L.
dc.creatorNeri, R.
dc.creatorPlanesas, P.
dc.date2007-02-05
dc.date2007-02-16
dc.date.accessioned2026-07-07T07:46:58Z
dc.date.available2026-07-07T07:46:58Z
dc.descriptionWe present new high angular resolution observations of the 13CO 1-0 rotational line towards the HBe star R Mon, obtained with the IRAM Bure Interferometer, along with the previous results in the observed transitions 12CO 1-0 and 2-1. We have used a flat disk model to fit the 12CO 1-0 and 2-1, and 13CO 1-0 emission, in a strip perpendicular to the outflow axis. The model assumes standard abundances (X(12CO) = 8x10^-5, X(13CO) = 9x10^7), radial potential temperature and density laws (T (K) = T0 r^-q, rho (cm^-3) = rho0 r^-p), and Local Thermodynamic Equilibrium. The 13CO and 12CO emission is consistent with a flat disk at an inclination angle of 20 degrees in Keplerian rotation around the star. The gaseous disk is fitted with a mass of 0.014 Msun, an outer radius of 1500 AU, a temperature of 4500 K at the inner radius (1 AU), and values of q=0.62 and p=1.3 for the indexes of the temperature and density laws. This new 13CO observations allow us to conclude that the disk around R Mon is flat. Our result confirms previous works suggesting a predominant flat geometry in disks around early Be stars.
dc.description4 pages, 5 figure. Proceedings of the conference "Science with ALMA: a new era for Astrophysics" hold in Madrid in November, 13-17, 2006
dc.identifierhttps://arxiv.org/abs/astro-ph/0702119
dc.identifierhttp://arxiv.org/abs/astro-ph/0702119
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/124005
dc.subjectAstrophysics
dc.titleNew 13CO observations towards the Keplerian gaseous disk around R Mon
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