Results 181 to 190 of about 942 (213)

Potential impact of the Sagittarius dwarf galaxy on the formation of young O-rich stars. [PDF]

Nat Commun
Sun T, Bi S, Chen X, Chen Y, Lu YL, Liu C, Buck T, Zhang X, Li T, Li Y, Wu Y, Ge Z, Ye L.   +12 more
europepmc   +1 more source

An Abrupt Change in the Disk Fraction of Free-Floating Planets at the Deuterium-Burning Ignition Limit

Rodrigues T, Bouy H, Raymond S, Martín E, Bertin E, Romero JO, Barrado D, Huélamo N, Tamura M, Roig NM, Galli P, Cuillandre J.   +11 more
europepmc   +1 more source

Stellar capture by an accretion disc [PDF]

Monthly Notices of the Royal Astronomical Society, 1998
Long-term evolution of a stellar orbit captured by a massive galactic center via successive interactions with an accretion disc has been examined. An analytical solution describing evolution of the stellar orbital parameters during the initial stage of the capture was found.
David Vokrouhlický, G Wallerstein
exaly   +3 more sources

Galactic Centre stellar winds and Sgr A* accretion [PDF]

Monthly Notices of the Royal Astronomical Society, 2006
(ABRIDGED) We present in detail our new 3D numerical models for the accretion of stellar winds on to Sgr A*. In our most sophisticated models, we put stars on realistic orbits around Sgr A*, include `slow' winds (300 km/s), and account for radiative cooling. We first model only one phase `fast' stellar winds (1000 km/s). For wind sources fixed in space,
Volker Springel, Sergei Nayakshin, Tiziana Di Matteo   +2 more
exaly   +5 more sources

Accretion disc response to a stellar fly-by [PDF]

Monthly Notices of the Royal Astronomical Society, 1993
We investigate the effect on an accretion disc around one star of a parabolic fly-by of another. In the prograde, coplanar encounter, the disc is tidally stripped down to about one half of the periastron radius, and a substantial fraction of the stripped material is captured by the intruder.
J E Pringle
exaly   +2 more sources

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Accretion of Stellar Winds in the Galactic Centre

2007
We report a 3-dimensional numerical study of the accretion of stellar winds onto Sgr A*, the super-massive black hole at the centre of our Galaxy. Compared with previous investigations, we allow the stars to be on realistic orbits, include the recently discovered slow wind sources, and allow for optically thin radiative cooling.
Volker Springel, Sergei Nayakshin, Jorge Cuadra   +2 more
exaly   +5 more sources

The Auriga stellar haloes: connecting stellar population properties with accretion and merging history [PDF]

Monthly Notices of the Royal Astronomical Society, 2019
Accepted to MNRAS.
Patricia Beatriz Tissera, Volker Springel, Robert Grand   +2 more
exaly   +7 more sources

Stellar accretion in active galactic nuclei

Monthly Notices of the Royal Astronomical Society, 1993
The Seyfert galaxy NGC 6814 is unique in showing evidence of a periodicity in its X-ray light curve, first seen in EXOSAT data and then confirmed by a Ginga observation. A further Ginga light curve of this source taken 18 months later shows that the periodic signal is still present.
A. R. King, C. Done
openaire   +1 more source

Stellar X‐ray accretion signatures

Astronomische Nachrichten, 2017
Accretion is observed in a wide range of objects with partially overlapping properties. In this paper, we focus on accretion in young stars. Material impacting the stellar surface is shock‐heated to temperatures of a few 106 K (MK), which is ideally suited for observations in the X‐ray regime.
P. C. Schneider, H. M. Günther, J. Robrade   +2 more
openaire   +1 more source

Stellar Accretion and X-ray Emission

Nature, 1967
Shklovsky has suggested that the Scorpius X-ray source is a binary pair and that the X-radiation arises from the collision of material from a giant star with a neutron star. The theoretical complications of such a model are now found not to match actual measurements and it is suggested that the bremsstrahlung effect occurs between a giant star and a ...
A. G. W. CAMERON, M. MOCK
openaire   +1 more source