Results 111 to 120 of about 17,073 (217)
Eccentric Disks with Self-gravity
The Astronomical JournalCan a disk orbiting a central body be eccentric, when the disk feels its own self-gravity and is pressureless? Contradictory answers appear in the literature. We show that, to linear order in eccentricity, such a disk can be eccentric, but only if it has
Yoram Lithwick +3 more
doaj +1 more source
Circumstellar disks in binary star systems
, 2012 In this paper we study the evolution of viscous and radiative circumstellar disks under the influence of a companion star. We focus on the eccentric {\gamma} Cephei and {\alpha} Centauri system as examples and compare the disk quantities such as disk ...
Artymowicz +49 more
core +1 more source
Deep Search for a Scattered Light Dust Halo Around Vega with the Hubble Space Telescope
The Astronomical JournalWe present a provisory scattered-light detection of the Vega debris disk using deep Hubble Space Telescope (HST) coronagraphy (PID 16666). At only 7.7 pc, Vega is immensely important in debris disk studies both for its prominence and also because it ...
Schuyler G. Wolff +8 more
doaj +1 more source
87th Annual Meeting of the Meteoritical Society 2025: Abstracts
Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley +1 more source
Spectropolarimetry and the Study of Circumstellar Disks [PDF]
, 2007 Circumstellar disks play an important role in many stages of the evolution of stars. However, it is only possible to directly image circumstellar disks for a few of the nearest stars. For massive stars, the situation is even more difficult, as they are on average further away than the more numerous low mass stars.
openaire +2 more sources
Light Echoes of Time-resolved Flares and Application to Kepler Data
The Open Journal of AstrophysicsLight 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
Polarization of Circumstellar Debris Disk Light Echoes
The Astronomical JournalAbstract Light echoes of debris disks around active stars can reveal disk structure and composition even when disks are not spatially resolved. Unfortunately, distinguishing reflected light from quiescent starlight and unexpected post-peak flare structure is challenging, especially for edge-on geometries where the time delay between ...
Austin J. King +3 more
openaire +3 more sources
A Census of the β Pic Moving Group and Other Nearby Associations with Gaia
The Astronomical JournalI 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
Understanding Balmer Decrements in T Tauri Stars in Terms of Multiflow Magnetospheric Accretion
The Astrophysical JournalMagnetospheric 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 +6 more
doaj +1 more source
86th Annual Meeting of the Meteoritical Society (2024)
Meteoritics &Planetary Science, Volume 59, Issue S1, Page A1-A468, August 2024.
wiley +1 more source