Results 1 to 10 of about 106 (90)

The Milky Way Project MOBStIRS: Parameterizing Infrared Stellar-wind Bow Shock Morphologies with Citizen Science

Astronomical Journal
Mass-loss influences stellar evolution, especially for massive stars with strong winds. Stellar wind bow shock nebulae driven by Galactic OB stars can be used to measure mass-loss rates ( $\dot{M}$ ).
Angelica S. Whisnant, Matthew S. Povich, Nikhil Patten, Henry A. Kobulnicky   +3 more
exaly   +2 more sources

Interstellar Bow Shocks around Fast Stars Passing through the Local Interstellar Medium

The Astrophysical Journal, 2023
Bow shocks are produced in the local interstellar medium by the passage of fast stars from the Galactic thin-disk and thick-disk populations with velocities V _* = 40–80 km s ^−1 .
J. Michael Shull, S. R. Kulkarni
doaj   +1 more source

X3: A High-mass Young Stellar Object Close to the Supermassive Black Hole Sgr A*

The Astrophysical Journal, 2023
To date, the proposed observation of young stellar objects (YSOs) in the Galactic center still raises the question of where and how these objects could have formed due to the violent vicinity of Sgr A*.
Florian Peißker, Michal Zajaček, Nadeen B. Sabha, Masato Tsuboi, Jihane Moultaka, Lucas Labadie, Andreas Eckart, Vladimír Karas, Lukas Steiniger, Matthias Subroweit, Anjana Suresh, Maria Melamed, Yann Clénet   +12 more
doaj   +1 more source

Faint but Not Forgotten. I. First Results from a Search for Astrospheres around AGB Stars in the Far-ultraviolet

The Astronomical Journal, 2023
Using the GALEX archive, we have discovered extended structures around ten asymptotic giant branch (AGB) stars (out of a total 92 searched) emitting in the far-ultraviolet (FUV) band.
Raghvendra Sahai, Benjamin Stenger
doaj   +1 more source

Gamma-ray emission from early-type stars interacting with AGN jets

EPJ Web of Conferences, 2013
We study the interaction of early-type stars with the jets of active galactic nuclei. A bow-shock will form as a consequence of the interaction of the jet with the winds of stars and particles can be accelerated up to relativistic energies in these ...
Araudo Anabella T., Bosch-Ramon Valentí, Romero Gustavo E.   +2 more
doaj   +1 more source

An Hα survey of infrared bow shocks around OB-type stars

Astronomy & Astrophysics
Context. Bow shocks around massive stars are commonly identified in mid-IR surveys, where emission from heated dust traces the interaction between stellar winds and the surrounding interstellar medium (ISM). In contrast, systematic optical investigations
Singh Saddal Kuljeet, Kraus Michaela, Nickeler Dieter H., Liimets Tiina, Karpov Sergey, Maryeva Olga V.   +5 more
doaj   +1 more source

OB runaway stars originating in the Vel OB1 association

Astronomy & Astrophysics
Context. OB runaway stars are massive stars moving through interstellar space with a high velocity (up to 200 km s−1). They are produced by dynamical ejections in young massive clusters or by supernova explosions in massive binaries.
Azatyan N., Kaper L., Samsonyan A., Stoop M., Andreasyan D., van den Eijnden J., Nikoghosyan E.   +6 more
doaj   +1 more source

Energy Dissipation in Strong Collisionless Shocks: The Crucial Role of Ion-to-electron Scale Separation in Particle-in-cell Simulations

The Astrophysical Journal Letters
Energy dissipation in collisionless shocks is a key mechanism in various astrophysical environments. Its nonlinear nature complicates analytical understanding and necessitates particle-in-cell (PIC) simulations. This study examines the impact of reducing
Mohamad Shalaby
doaj   +1 more source

Strong Bow Shocks: Turbulence and an Exact Self-similar Asymptotic

The Astrophysical Journal
We show that strong bow shocks are turbulent and nonuniversal near the head but asymptote to a universal, steady, self-similar, and analytically solvable flow in the downstream.
Marcus DuPont, Andrei Gruzinov, Andrew MacFadyen   +2 more
doaj   +1 more source

SDSO 1 is a Shocked Ghost Planetary Nebula in Front of M 31

The Astrophysical Journal
We present new, deep narrowband imagery and discuss the nature of SDSO 1, the large [O iii ]-emitting nebula centered $1\mathop{.}\limits^{^\circ }5$ SE of M 31.
Patrick Ogle, Mark Petersen, R. Michael Rich, Tim Schaeffer, Lewis McCallum, Alberto Noriega-Crespo, Biny Sebastian, Carl Björk, Steeve Body, Sendhil Chinnasamy, Marcel Drechsler, Tarun Kottary, Yann Sainty, Patrick Sparkman, Xavier Strottner   +14 more
doaj   +1 more source