Results 1 to 10 of about 309 (219)
An In Situ Study of Turbulence near Stellar Bow Shocks [PDF]
Astrophysical Journal, 2021 Abstract Stellar bow shocks are observed in a variety of interstellar environments and shaped by the conditions of gas in the interstellar medium (ISM). In situ measurements of turbulent density fluctuations near stellar bow shocks are only achievable with a few observational probes, including Hα-emitting bow shocks and the Voyager ...
Stella Koch Ocker +2 more
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Nonthermal Emission from Stellar Bow Shocks [PDF]
Astrophysical Journal, 2018 Abstract Since the detection of nonthermal radio emission from the bow shock of the massive runaway star BD +43°3654, simple models have predicted high-energy emission, at X-rays and gamma-rays, from these Galactic sources. Observational searches for this emission so far give no conclusive evidence but a few candidates at gamma-rays.
M Pohl
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Radio detections of IR-selected runaway stellar bow shocks [PDF]
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.
J van den Eijnden, Saikia P
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Searching for Faint X-Ray Emission from Galactic Stellar Wind Bow Shocks
Astronomical Journal, 2019 Abstract We present a stacking analysis of 2.61 Ms of archival Chandra observations of stellar wind bow shocks. We place an upper limit on the X-ray luminosity of infrared-detected bow shocks of <2 × 1029 erg s−1, a more stringent constraint than has been found in previous archival studies and dedicated observing campaigns of nearby ...
Breanna A Binder +2 more
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Probing the non-thermal physics of stellar bow shocks using radio observations [PDF]
Astronomy and 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 +2 more
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Modeling nonthermal emission from stellar bow shocks [PDF]
Astronomy and Astrophysics, 2016 Runaway O- and early B-type stars passing throughout the interstellar medium at supersonic velocities and characterized by strong stellar winds may produce bow shocks that can serve as particle acceleration sites. Previous theoretical models predict the production of high energy photons by non-thermal radiative processes, but their efficiency is still ...
J López-Santiago +2 more
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The Astronomical JournalMass-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 +3 more
doaj +4 more sources
OB STARS AND STELLAR BOW SHOCKS IN CYGNUS-X: A NOVEL LABORATORY ESTIMATING STELLAR MASS LOSS RATES [PDF]
Astrophysical Journal, 2010 49 pages, 19 figures; Accepted for publication in ApJ; full-resolution color figure version available at http://physics.uwyo.edu/~chip/Papers/CygXBowshocks; comments ...
Henry A Kobulnicky, Daniel C Kiminki
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New stellar bow shocks and bubbles found around runaway stars [PDF]
Astronomy and AstrophysicsContext. 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.
P Benaglia, J M Paredes, M Ribo
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Stellar Bow Shocks in the Northern Arm of the Galactic Center: More Members and Kinematics of the Massive Star Population [PDF]
Astrophysical Journal, 2005 We present new 2.2 micron diffraction-limited images from the W. M. Keck 10 m and Gemini 8 m telescopes of the cool Galactic Center sources, IRS 1W, 5, 8, 10W, and 21 along with new proper motions for IRS 1W, 10W and 21. These observations were carried out to test the bowshock hypothesis presented by Tanner et al. as an alternative to a very recent (10^
A Tanner, Mark Morris
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