Results 41 to 50 of about 2,036 (233)
XMM‐Newton Observations of the Peculiar Be X‐Ray Binary A0538‐66
Astronomische Nachrichten, Volume 346, Issue 1, January 2025.ABSTRACT A0538‐66 is a neutron star/Be x‐ray binary located in the Large Magellanic Cloud and, since its discovery in the 70s, it showed a peculiar behavior that makes it a unique object in the high‐mass x‐ray binaries scene: the extremely eccentric orbit (e=0.72$$ e=0.72 $$), the short spin period of the neutron star (P=69$$ P=69 $$ ms), the episodes ...
Michela Rigoselli +3 more
wiley +1 more source
RX J0123.4-7321 -- the story continues: major circumstellar disk loss and recovery [PDF]
, 2021 M. J. Coe +3 more
openalex +1 more source
Astronomische Nachrichten, Volume 345, Issue 8, October 2024.Abstract Astrophysical accretion discs that carry a significant mass compared with their central object are subject to the effect of self‐gravity. In the context of circumstellar discs, this can, for instance, cause fragmentation of the disc gas, and—under suitable conditions—lead to the direct formation of gas‐giant planets.
Oliver Gressel, Udo Ziegler
wiley +1 more source
Linking Circumstellar Disk Lifetimes to the Rotational Evolution of Low-mass Stars
The Astrophysical Journal, 2023 The high-energy radiation emitted by young stars can have a strong influence on their rotational evolution at later stages. This is because internal photoevaporation is one of the major drivers of the dispersal of circumstellar disks, which surround all ...
K. Monsch +4 more
doaj +1 more source
Optical and Near-Infrared Monitoring of Gamma-ray Binaries Hosting Be Stars
Universe, 2021 Optical and near-infrared observations are compiled for the three gamma-ray binaries hosting Be stars: PSR B1259−63, LSI+61 303, and HESS J0632+057. The emissions from the Be disk are considered to vary according to the changes in its structure, some of ...
Yuki Moritani, Akiko Kawachi
doaj +1 more source
Natural Sciences, Volume 4, Issue 4, October 2024.Large free aromatic species, with up to 61 carbon atoms, were detected in grains of the Ryugu carbonaceous asteroid using ultra‐sensitive two‐step laser mass spectrometry. This discovery confirms the presence of large polycyclic aromatic hydrocarbons in the interstellar medium and provides new information on the formation and evolution of organic ...
Hassan Sabbah +3 more
wiley +1 more source
Complex Structure around a Circumstellar Disk Caused by Interchange Instability
The Astrophysical Journal LettersWe perform a three-dimensional nonideal magnetohydrodynamic simulation of a strongly magnetized cloud core and investigate the complex structure caused by the interchange instability. This is the first simulation that does not use a central sink cell and
Masahiro N. Machida, Shantanu Basu
doaj +1 more source
Analysis of star-disk interaction in young stellar systems
EPJ Web of Conferences, 2014 We present preliminary results of the study of star-disk interaction in the classical T Tauri star V354 Mon, a member of the young stellar cluster NGC 2264.
Fonseca N.N.J. +2 more
doaj +1 more source
, 1999 33 pages, 12 figures, to be published in The Physics of Star Formation and Early Evolution II, C.J. Lada and N.D.
openaire +2 more sources
CIRCUMSTELLAR DEBRIS DISKS: DIAGNOSING THE UNSEEN PERTURBER [PDF]
The Astrophysical Journal, 2016 ABSTRACT The first indication of the presence of a circumstellar debris disk is usually the detection of excess infrared emission from the population of small dust grains orbiting the star. This dust is short-lived, requiring continual replenishment, and indicating that the disk must be excited by an unseen perturber.
Erika R. Nesvold +3 more
openaire +2 more sources