Results 21 to 30 of about 309 (219)

E-BOSS: An Extensive stellar BOw Shock Survey [PDF]

open access: bronzeAstronomy & Astrophysics, 2015
20 pages, 11 figures, and 8 tables.
C. S. Peri, P. Benaglia, N. L. Isequilla
openalex   +4 more sources

Runaway O and Be Stars Found Using Gaia DR3, New Stellar Bow Shocks and Search for Binaries [PDF]

open access: hybridBulletin de la Société Royale des Sciences de Liège
A relevant fraction of massive stars are runaways, moving with a significant peculiar velocity with respect to their environment. Kicks from supernova explosions or the dynamical ejection of stars from clusters can account for the runaway genesis. We have used Gaia DR3 data to study the velocity distribution of massive O and Be stars from the GOSC and ...
M. Carretero-Castrillo   +3 more
  +6 more sources

Ks- andLp-band polarimetry on stellar and bow-shock sources in the Galactic center [PDF]

open access: bronzeAstronomy & Astrophysics, 2013
Infrared observations of the Galactic center (GC) provide a unique opportunity to study stellar and bow-shock polarization effects in a dusty environment. The goals of this work are to present new Ks- and Lp-band polarimetry on an unprecedented number of sources in the central parsec of the GC, thereby expanding our previous results in the H- and Ks ...
R. M. Buchholz   +3 more
openalex   +4 more sources

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

open access: greenMonthly 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   +4 more
openalex   +5 more sources

Modeling nonthermal emission from stellar bow shocks (Research Note) [PDF]

open access: green, 2016
Context. Runaway O- and early B-type stars passing through 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 nonthermal radiative processes, but their efficiency is ...
V. Pereira   +4 more
  +5 more sources

THE MYSTERIOUS SICKLE OBJECT IN THE CARINA NEBULA: A STELLAR WIND INDUCED BOW SHOCK GRAZING A CLUMP? [PDF]

open access: bronzeThe Astrophysical Journal, 2013
Optical and near-infrared images of the Carina Nebula show a peculiar arc-shaped feature, which we call the "Sickle", next to the B-type star Trumpler 14 MJ 218. We use multi-wavelength observations to explore and constrain the nature and origin of the nebulosity. Using sub-mm data from APEX/LABOCA as well as Herschel far-infrared maps, we discovered a
J. Ngoumou   +3 more
openalex   +4 more sources

Thermal emission from bow shocks. III. Variable diffuse X-ray emission from stellar-wind bow shocks driven by dynamical instabilities [PDF]

open access: greenAstronomy & Astrophysics
Context. X-ray emission from wind-driven bow shocks is both difficult to measure and predict, but may give important insights into the energy budget of the hot phase of the interstellar medium (ISM) by quantifying mixing at the interface between hot and warm gas phases. Aims.
Jonathan Mackey   +7 more
openalex   +3 more sources

H2O masers in a jet-driven bow shock: episodic ejection from a massive young stellar object [PDF]

open access: bronzeMonthly Notices of the Royal Astronomical Society, 2016
We report the results of VERA multi-epoch VLBI 22 GHz water maser observations of S255IR-SMA1, a massive young stellar object located in the S255 star forming region. By annual parallax the source distance was measured as D = 1.78 +-0.12 kpc and the source systemic motion was (u alpha cos d, u d) = (-0.13 +- 0.20, -0.06 +- 0.27) mas yr-1. Masers appear
Ross A. Burns   +4 more
openalex   +3 more sources

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

open access: yesThe 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

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