Results 51 to 60 of about 195 (134)

The global structure of astrospheres: Effect of Knudsen number

Publications of the Astronomical Society of Australia
Abstract The interaction between stellar winds and the partially ionized local interstellar medium (LISM) is quite common in astrophysics. However, the main difficulty in describing the neutral components lies in the fact that the mean free path of an interstellar atom, l, can be comparable to the characteristic size of an astrosphere, L (i.e.
Sergey Korolkov, Vladislav Izmodenov
openaire   +2 more sources

A Search for Lyα Emission from the Astrosphere of 40 Eridani A

The Astrophysical Journal, 2003
We report the results of Hubble Space Telescope (HST) observations of the nearby (d = 5.0 pc) K1 V star 40 Eri A, which we use to search for scattered Lyα emission surrounding the star indicative of the interaction between the stellar wind and the interstellar medium (ISM).
Brian E. Wood, Jeffrey L. Linsky, Hans‐Reinhard Muller, Gary P. Zank   +3 more
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Winds in Star Clusters Drive Kolmogorov Turbulence [PDF]

, 2020
Intermediate and massive stars drive fast and powerful isotropic winds that interact with the winds of nearby stars in star clusters and the surrounding interstellar medium (ISM).
Burkhart, Blakesley, Rosen, Anna L., Ramirez-Ruiz, Enrico, Naiman, Jill P., Gallegos-Garcia, Monica   +4 more
core   +1 more source

Signatures of Reconnection and a Split Heliospheric Tail in High-energy Energetic Neutral Atoms

The Astrophysical Journal
The shape of the heliosphere, regarded as comet-like since the 1960s, has recently been the subject of intense debate in the last decade. There is disagreement as to whether the heliospheric tail extends to ∼10,000 au in a comet-like shape or if it is ...
M. Kornbleuth, M. Opher, J. F. Drake, M. Swisdak, Zhiyu Yin, K. Dialynas, Y. Chen, J. Giacalone, J. M. Sokół, M. Gkioulidou, I. Baliukin, V. Izmodenov, G. P. Zank   +12 more
doaj   +1 more source

Lyα Absorption in a “Croissant-like” Heliosphere

The Astrophysical Journal
Ly α absorption profiles have been used to detect astrospheres and heliospheric absorption from the hydrogen wall and heliotail. Using magnetohydrodynamic models of the heliosphere, we can compare simulated to observed Ly α profiles to probe the neutral ...
Erick Powell, Merav Opher, Marc Z. Kornbleuth, Igor Baliukin, Adam T. Michael, Brian E. Wood, Vladislav Izmodenov, Gabor Toth, Valeriy Tenishev   +8 more
doaj   +1 more source

Numerical modeling of the evolution of stellar wind cavities and supernova remnants [PDF]

, 2016
PhD (Physics), North-West University, Potchefstroom Campus, 2017An astrosphere is a low density cavity that results from an outflowing supersonic wind. Of particular interest in this study is the effect of radiative cooling on the computed evolution of
Van der Schyff, Augusts Eric
core   +1 more source

The Interstellar Medium Surrounding the Sun [PDF]

, 2011
The Solar System is embedded in a flow of low-density, warm, and partially ionized interstellar material that has been sampled directly by in situ measurements of interstellar neutral gas and dust in the heliosphere. Absorption line data reveal that this
Priscilla C. Frisch, Seth Redfield, Jonathan D. Slavin   +2 more
core   +1 more source

Simulating the Environment Around Planet-Hosting Stars [PDF]

, 2016
Recent developments in instrumentation and observational techniques have opened a new window for stellar magnetic field studies. In particular Zeeman Doppler Imaging (ZDI) is now routinely used to recover the large-scale magnetic field topologies of ...
J. D. Alvarado-Gómez, Hussain, G. (5199484), Alvarado-Gómez, Julián David, T. I. Gombosi, Hussain, G., G. A. J. Hussain, Grunhut, J., Garrafo, C. (5206570), J. J. Drake, Drake, J. J. (5206564), Garrafo, C., Cohen, O. (5206573), J. Grunhut, Cohen, O., Gombosi, T. I., C. Garraffo, Drake, J. J., Alvarado-Gómez, Julián David (5206561), Grunhut, J. (5206576), O. Cohen, Gombosi, T. I. (5206567)   +20 more
core   +1 more source

First Resolution of a Main-sequence G star’s Astrosphere Using Chandra

The Astrophysical Journal
Abstract We report the resolution of a halo of X-ray line emission surrounding the zero-age main-sequence G8.5V star HD 61005 by Chandra/ACIS-S. Located only ∼36 pc distant, HD 61005 is young (100 ± 50 Myr) and X-ray bright (∼300 × solar), observed with a nearly edge-on geometry and surrounded by very local ...
Lisse, Carey, Wolk, Scott, Snios, Bradford, Mcnutt, Ralph, Slavin, Jonathan, Osten, Rachel, Hines, Dean, Debes, John, Koutroumpa, Dimitra, Kharchenko, V., Linsky, Jeffrey, Brandt, Pontus, Horanyi, Mihaly, Günther, H, Guinan, Edward, Redfield, Seth, Frisch, Priscilla, Dennerl, Konrad, Kashyap, Vinay, Kislyakova, Kristina, Fernandez, Yanga, Provornikova, Elena, Macgregor, Meredith, Chen, Christine, Paxton, L., Dialynas, Konstantinos, Gu, Liyi   +26 more
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Heliospheric, Astrospheric, and Interstellar Lyα Absorption toward 36 Ophiuchi

The Astrophysical Journal, 2000
We use high-resolution UV spectra taken by the Space Telescope Imaging Spectrograph instrument on board the Hubble Space Telescope to study the 5.5 pc line of sight to the K0 V star 36 Oph A. The one interstellar component detected for this line of sight has a velocity inconsistent with the local interstellar cloud (LIC) flow vector but consistent with
Brian E. Wood, Jeffrey L. Linsky, Gary P. Zank   +2 more
openaire   +1 more source