Results 11 to 20 of about 6,384 (241)

Radio detections of IR-selected runaway stellar bow shocks

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT Massive stars moving at supersonic peculiar velocities through the interstellar medium (ISM) can create bow shocks, arc-like structures at the interface between the stellar wind and the ISM. Many such bow shocks have been detected and catalogued at IR wavelengths, but detections in other wavebands remain rare.
Van den Eijnden, J, Saikia, P, Mohamed, S   +2 more
openaire   +4 more sources

Probing the non-thermal physics of stellar bow shocks using radio observations

Astronomy & Astrophysics, 2023
Context. Massive runaway stars produce bow shocks in the interstellar medium. Recent observations revealed radio emission from a few of these objects, but the origin of this radiation remains poorly understood. Aims. We aim to interpret this radio emission and assess under which conditions it could be either thermal (free–free) or non-thermal ...
J. R. Martinez, S. del Palacio, V. Bosch‐Ramon   +2 more
openaire   +7 more sources

Cometary compact H II regions are stellar-wind bow shocks

The Astrophysical Journal, 1990
Comet-shaped H II regions, like G34.3 + 0.2, are easily explained as bow shocks created by wind-blowing massive stars moving supersonically through molecular clouds. The required velocities of the stars through dense clumps are less than about 10 km/s, comparable to the velocity dispersion of stars in OB associations.
Dave van Buren, Mordecai-Mark Mac Low, Douglas O. S. Wood, Ed Churchwell   +3 more
openaire   +3 more sources

X-ray study of bow shocks in runaway stars [PDF]

Monthly Notices of the Royal Astronomical Society, 2017
Massive runaway stars produce bow shocks through the interaction of their winds with the interstellar medium, with the prospect for particle acceleration by the shocks. These objects are consequently candidates for non-thermal emission.
Benaglia, Paula, De Becker, M., del Valle, Maria Victoria, Peri, Cintia Soledad, Romero, Gustavo Esteban   +4 more
core   +6 more sources

New stellar bow shocks and bubbles found around runaway stars

Astronomy & Astrophysics
Context. Runaway stars with peculiar high velocities can generate stellar bow shocks. Only a few bow shocks show clear radio emission. Aims. Our goal is to identify and characterize new stellar bow shocks around O and Be runaway stars in the infrared (IR), as well as to study their possible radio emission and nature. Methods.
M. Carretero-Castrillo, P. Benaglia, J. M. Paredes, M. Ribó   +3 more
openaire   +4 more sources

The visibility of the Mach disk and the bow shock of a stellar jet

The Astrophysical Journal, 1989
This paper uses a simple model to determine which of the two principal shocks at the end of a stellar jet, the bow shock or the Mach disk, emits more light at H-beta. It is found that the two shocks should have comparable surface brightness provided the jet and ambient medium densities do not differ by more than one to two orders of magnitude, and both
Patrick Hartigan
openaire   +3 more sources

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

Polarization simulations of stellar wind bow shock nebulae – II. The case of dust scattering [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT We study the polarization produced by scattering from dust in a bow shock-shaped region of enhanced density surrounding a stellar source, using the Monte Carlo radiative transfer code SLIP. Bow shocks are structures formed by the interaction of the winds of fast-moving stars with the interstellar medium.
Manisha Shrestha, Hilding R Neilson, Jennifer L Hoffman, Richard Ignace, Andrew G Fullard   +4 more
openaire   +3 more sources

Jet Bow Shocks and Clumpy Shells of H2 Emission in the Young Stellar Outflow Cepheus A

The Astronomical Journal, 1996
Patrick Hartigan, John M. Carpenter, Catherine Dougados, M. F. Skrutskie   +3 more
openaire   +3 more sources