scholarly journals Interstellar Weather Vanes: GLIMPSE Mid‐Infrared Stellar Wind Bow Shocks in M17 and RCW 49

2008 ◽  
Vol 689 (1) ◽  
pp. 242-248 ◽  
Author(s):  
Matthew S. Povich ◽  
Robert A. Benjamin ◽  
Barbara A. Whitney ◽  
Brian L. Babler ◽  
Rémy Indebetouw ◽  
...  
Keyword(s):  
Stellar Wind ◽  
Mid Infrared ◽  
Bow Shocks

scholarly journals Extended red objects and stellar-wind bow shocks in the Carina Nebula

2014 ◽  
Vol 446 (1) ◽  
pp. 1047-1059 ◽  
Author(s):  
Remington O. Sexton ◽  
Matthew S. Povich ◽  
Nathan Smith ◽  
Brian L. Babler ◽  
Marilyn R. Meade ◽  
...  
Keyword(s):  
Stellar Wind ◽  
Carina Nebula ◽  
Bow Shocks

Cometary compact H II regions are stellar-wind bow shocks

1990 ◽  
Vol 353 ◽  
pp. 570 ◽  
Author(s):  
Dave van Buren ◽  
Mordecai-Mark Mac Low ◽  
Douglas O. S. Wood ◽  
Ed Churchwell
Keyword(s):  
Stellar Wind ◽  
H Ii Regions ◽  
Bow Shocks

scholarly journals Bow shocks, bow waves, and dust waves – III. Diagnostics

2019 ◽  
Vol 489 (2) ◽  
pp. 2142-2158 ◽  
Author(s):  
William J Henney ◽  
S J Arthur
Keyword(s):  
Mass Loss ◽  
Loss Rate ◽  
Mass Loss Rate ◽  
Previous Method ◽  
Radiative Energy ◽  
Mid Infrared ◽  
Bow Waves ◽  
Bow Shocks ◽  
Infrared Wavelengths ◽  
Loss Rates

ABSTRACT Stellar bow shocks, bow waves, and dust waves all result from the action of a star’s wind and radiation pressure on a stream of dusty plasma that flows past it. The dust in these bows emits prominently at mid-infrared wavelengths in the range 8 to   60 $\mu$m. We propose a novel diagnostic method, the τ–η diagram, for analysing these bows, which is based on comparing the fractions of stellar radiative energy and stellar radiative momentum that is trapped by the bow shell. This diagram allows the discrimination of wind-supported bow shocks, radiation-supported bow waves, and dust waves in which grains decouple from the gas. For the wind-supported bow shocks, it allows the stellar wind mass-loss rate to be determined. We critically compare our method with a previous method that has been proposed for determining wind mass-loss rates from bow shock observations. This comparison points to ways in which both methods can be improved and suggests a downward revision by a factor of two with respect to previously reported mass-loss rates. From a sample of 23 mid-infrared bow-shaped sources, we identify at least four strong candidates for radiation-supported bow waves, which need to be confirmed by more detailed studies, but no strong candidates for dust waves.

scholarly journals Searching for Faint X-Ray Emission from Galactic Stellar Wind Bow Shocks

2019 ◽  
Vol 157 (5) ◽  
pp. 176 ◽  
Author(s):  
Breanna A. Binder ◽  
Patrick Behr ◽  
Matthew S. Povich
Keyword(s):  
Stellar Wind ◽  
X Ray ◽  
Bow Shocks

scholarly journals Planetary Evaporation and the Dynamics of Planet Wind/Stellar Wind Bow Shocks

2015 ◽  
Vol 10 (S314) ◽  
pp. 237-240 ◽  
Author(s):  
A. Frank ◽  
B. Lui ◽  
J. Carroll-Nellenback ◽  
A. C. Quillen ◽  
E. G. Blackman ◽  
...  
Keyword(s):  
Flow Structure ◽  
Stellar Wind ◽  
Adaptive Mesh Refinement ◽  
Mesh Refinement ◽  
Adaptive Mesh ◽  
Bow Waves ◽  
Bow Shocks ◽  
Initial Results

AbstractWe present initial results of a new campaign of simulations focusing on the interaction of planetary winds with stellar environments using Adaptive Mesh Refinement methods. We have confirmed the results of Stone & Proga (2009) that an azimuthal flow structure is created in the planetary wind due to day/night temperatures differences. We show that a backflow towards the planet will occur with a strength that depends on the escape parameter. When a stellar outflow is included, we see unstable bow waves forming through the outflow's interaction with the planetary wind.

scholarly journals On the ring nebulae around runaway Wolf–Rayet stars

2020 ◽  
Vol 496 (3) ◽  
pp. 3906-3911
Author(s):  
D M-A Meyer ◽  
L M Oskinova ◽  
M Pohl ◽  
M Petrov
Keyword(s):  
High Latitude ◽  
Stellar Wind ◽  
Near Infrared ◽  
Moving Objects ◽  
Galactic Plane ◽  
Massive Stars ◽  
Ambient Medium ◽  
Bow Shock ◽  
Fast Wind ◽  
Bow Shocks

ABSTRACT Wolf–Rayet stars are advanced evolutionary stages of massive stars. Despite their large mass-loss rates and high wind velocities, none of them displays a bow shock, although a fraction of them are classified as runaway. Our 2.5-D numerical simulations of circumstellar matter around a $60\mbox{-}\rm M_{\odot }$ runaway star show that the fast Wolf–Rayet stellar wind is released into a wind-blown cavity filled with various shocks and discontinuities generated throughout the preceding evolutionary phases. The resulting fast-wind–slow-wind interaction leads to the formation of spherical shells of swept-up dusty material similar to those observed in the near-infrared at $24\, \rm \mu \rm m$ with Spitzer, which appear to be comoving with the runaway massive stars, regardless of their proper motion and/or the properties of the local ambient medium. We interpret bright infrared rings around runaway Wolf–Rayet stars in the Galactic plane as an indication of their very high initial masses and complex evolutionary history. Stellar-wind bow shocks become faint as stars run in diluted media, therefore our results explain the absence of bow shocks detected around Galactic Wolf–Rayet stars, such as the high-latitude, very fast-moving objects WR71, WR124 and WR148. Our results show that the absence of a bow shock is consistent with the runaway nature of some Wolf–Rayet stars. This questions the in situ star formation scenario of high-latitude Wolf–Rayet stars in favour of dynamical ejection from birth sites in the Galactic plane.

scholarly journals Concerning the occurrence of bow shocks around high-mass X-ray binaries

2019 ◽  
Vol 621 ◽  
pp. A37 ◽  
Author(s):  
M. Prišegen
Keyword(s):  
High Mass ◽  
Wide Field ◽  
Mid Infrared ◽  
X Ray ◽  
The Galaxy ◽  
Bow Shocks ◽  
Supernova Explosions ◽  
X Ray Binaries ◽  
Infrared Survey ◽  
Parent Star

Context. We investigate the occurrence of stellar bow shocks around high-mass X-ray binaries (HMXBs) in the Galaxy. Aims. We seek to conduct a survey of HMXBs in the mid-infrared to search for the presence of bow shocks around these objects. Methods. Telescopes operating in the mid-infrared, such as the Spitzer Space Telescope or Wide-field Infrared Survey Explorer (WISE), are potent tools for searching for the stellar bow shocks. We used the available archival data from these telescopes to search for bow shock candidates around the confirmed and candidate HMXBs in the Galaxy. Results. We detected extended mid-infrared structures around several surveyed confirmed and candidate HMXBs. Two of these structures, associated with Vela X-1 and 4U 1907+09, are genuine bow shocks that have been studied previously. However, there are no new unambiguous bow shocks among the rest of the objects. The paucity of bow shocks around HMXBs suggests that the majority of these systems still reside within hot, low-density bubbles around their parent star clusters or associations. This also implies that the dynamical ejection of massive binaries is apparently less efficient than the ejections caused by the supernova explosions inside a binary.

AMICA: the Antarctic Mid-Infrared CAmera for the IRAIT telescope

2005 ◽  
Vol 14 ◽  
pp. 337-342 ◽  
Author(s):  
M. Dolci ◽  
G. Valentini ◽  
O. Straniero ◽  
G. Di Rico ◽  
M. Ragni ◽  
...  
Keyword(s):  
Infrared Camera ◽  
Mid Infrared ◽  
The Antarctic
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