Results 81 to 90 of about 77,803 (191)

Light Echoes of Time-resolved Flares and Application to Kepler Data

The Open Journal of Astrophysics
Light echoes of stellar flares provide an intriguing option for exploring protoplanetary disks in young stellar systems. Previous work on light echoes of circumstellar disks made use of delta-function flares for modeling.
Austin King, Benjamin C. Bromley
doaj   +1 more source

Reference-less algorithm for circumstellar disks imaging

, 2018
Circumstellar disks play a key role in the understanding of stellar systems. Direct imaging of such extended structures is a challenging task. Current post-processing techniques, first tailored for exoplanets imaging, tend to produce deformed images of ...
Pairet, Benoît, Cantalloube, Faustine, Jacques, Laurent, International Traveling Workshop on Interactions Between Sparse Models and Technology (iTWIST'19)   +3 more
core  

Size distribution of circumstellar disks in the Trapezium cluster

, 2005
In this paper we present results on the size distribution of circumstellar disks in the Trapezium ...
J. Alves, S. M. Vicente
core   +1 more source

On the HR 4796A circumstellar disk

, 1999
We investigate in details the properties of the disk surrounding the 8 Myr old star HR 4796A, one of the few stars bringing precious clues to better understand the scenario which lead to planetary system formation. We propose a model able to reproduce all the available observations : the full spectral energy distribution from the mid-infrared to the ...
Augereau, J. C., Lagrange, A. M., Mouillet, D., Papaloizou, J. C. B., Grorod, P. A.   +4 more
openaire   +2 more sources

Modeling sgB[e] Circumstellar Disks

, 2017
During their evolution, massive stars are characterized by a significant loss of mass either via spherically symmetric stellar winds or by aspherical mass-loss mechanisms, namely outflowing equatorial disks.
Feldmeier, Achim (Prof. Dr.), Kurfürst, P., Krtička, Jiri   +2 more
core  

A Census of the β Pic Moving Group and Other Nearby Associations with Gaia

The Astronomical Journal
I have used the third data release of the Gaia mission to improve the reliability and completeness of membership samples in the β Pic moving group (BPMG) and other nearby associations with ages of 20–50 Myr (Sco Body, Carina, Columba, χ ^1 For, Tuc-Hor ...
K. L. Luhman
doaj   +1 more source

Methanol Masers as Tracers of Circumstellar Disks

, 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.
Phillips, CJ (15475688), Byleveld, SE (15482594), Troup, ER (15482600), Wellington, KJ (15482603), Norris, RP (15475670), Simon Ellingsen (14735971), Peter McCulloch (14743786), Tzioumis, AK (15475700), Takahashi, Y (5387725), Gough, RG (15475706), Reynolds, JE (15475697), Kesteven, MJ (15478130), Diamond, PJ (15482597), Ferris, RH (15475748)   +13 more
core  

Early Planet Formation in Embedded Disks (eDisk). XXIV. Systematic Investigation of Disk Structures based on Visibility Analysis

The Astronomical Journal
The dust continuum emission from young protostellar disks encodes key information about their mass distribution and early evolution, yet uniform high-resolution comparative studies remain limited.
Mayank Narang, Jerry Xu, Leslie W. Looney, Nagayoshi Ohashi, Anika Khandavalli, Patrick Sheehan, Jonathan P. Williams, Shigehisa Takakuwa, Jes K. Jørgensen, Ilseung Han, Woojin Kwon, Zhi-Yun Li, Nguyen Thi Phuong, John J. Tobin   +13 more
doaj   +1 more source

Understanding Balmer Decrements in T Tauri Stars in Terms of Multiflow Magnetospheric Accretion

The Astrophysical Journal
Magnetospheric accretion is the paradigm for accretion in classical T Tauri stars (CTTSs). However, the standard, one-flow magnetospheric accretion model fails to replicate important characteristics such as the observed Balmer decrements. We address this
Naiara Patiño, Nuria Calvet, Gladis Magris, Marbely Micolta, Thanawuth Thanathibodee, Thomas K. Waters, María José Colmenares   +6 more
doaj   +1 more source

High-velocity Circumstellar Gas Orbiting a White Dwarf Star

The Astrophysical Journal
Numerous white dwarf stars are known to be orbited by disks of gas and dust. To date, broad, ∼300 km s ^−1 wide, gaseous circumstellar absorption features have only been reported for the already iconic WD 1145+017, where one is witnessing the breakup of ...
B. Zuckerman, Érika Le Bourdais, Beth L. Klein, Patrick Dufour, Carl Melis, Alycia J. Weinberger, Siyi Xu, Antoine Bédard, Detlev Koester   +8 more
doaj   +1 more source