Results 1 to 10 of about 17,034 (183)
Microlensing of Circumstellar Disks [PDF]
The Astrophysical Journal, 2005 We investigate the microlensing effects on a source star surrounded by a circumstellar disk, as a function of wavelength. The microlensing light curve of the system encodes the geometry and surface brightness profile of the disk.
Brice Menard +8 more
core +2 more sources
, 1999 This article is a tutorial on deriving physical properties from the spectral energy distributions of circumstellar disks. It includes a new derivation of disk mass from millimeter-wave flux density using recent disk model parameters.
Beckwith, Steven V. W.
core +3 more sources
Tracing episodic accretion with NOEMA: FU Orionis-type stars and their millimeter environment [PDF]
EPJ Web of Conferences, 2022 The earliest phases of star formation are characterised by intense mass accretion from the circumstellar disk to the central star. One group of lowmass young stellar objects, FU Orionis-type stars (FUors) exhibit accretion rate peaks accompanied by ...
Fehér O. +6 more
doaj +1 more source
Vortices in Circumstellar Disks [PDF]
The Astrophysical Journal, 1995 Comment: uuencoded compressed PostScript file containing 30 pages. 5 figures available upon request. Submitted to ApJ.
Adams, Fred, Watkins, Richard
openaire +2 more sources
Dynamics of Circumstellar Disks [PDF]
The Astrophysical Journal, 1998 We present a series of 2-dimensional hydrodynamic simulations of massive disks around protostars. We simulate the same physical problem using both a `Piecewise Parabolic Method' (PPM) code and a `Smoothed Particle Hydrodynamic' (SPH) code, and analyze their differences.
Nelson, Andrew F. +3 more
openaire +2 more sources
The Astrophysical Journal, 2023 The first step toward planet formation is grain growth from (sub)micrometer to millimeter/centimeter sizes. Grain growth has been reported not only in Class II protoplanetary disks but also in Class 0/I protostellar envelopes.
Ilseung Han +4 more
doaj +1 more source
Turbulence in circumstellar disks [PDF]
Astronomy & Astrophysics, 2004 We investigate the analogy between circumstellar disks and the Taylor-Couette flow. Using the Reynolds similarity principle, the analogy results in a number of parameter-free predictions about stability of the disks, and their turbulent transport properties, provided the disk structure is available.
Hersant, Franck +2 more
openaire +4 more sources
Methanol Masers as Tracers of Circumstellar Disks [PDF]
, 1998 We show that in many methanol maser sources the masers are located in lines, with a velocity gradient along them which suggests that the masers are situated in edge-on circumstellar, or protoplanetary, disks.
A. K. Tzioumis +28 more
core +2 more sources
A Spitzer view of protoplanetary disks in the gamma Velorum cluster [PDF]
, 2008 We present new Spitzer Space Telescope observations of stars in the young ~5 Myr gamma Velorum stellar cluster. Combining optical and 2MASS photometry, we have selected 579 stars as candidate members of the cluster.
Baraffe I. +13 more
core +2 more sources
Interferometric Observations of the T Tauri Stars in the MBM 12 Cloud [PDF]
, 2003 We have carried out a millimeter interferometric continuum survey toward 7 YSOs in the MBM 12 cloud. Thermal emissions associated with 2 YSOs were detected above the 3-$\sigma$ level at 2.1 mm, and one also showed a 1.3 mm thermal emission.
Dutrey A. +17 more
core +2 more sources