scholarly journals Discovering the 3D Structure and Dynamics of the Sun-Interstellar Medium System on a Global Scale Los Alamos LDRD Report

2021 ◽  
Author(s):  
Daniel Reisenfeld
Keyword(s):  
Interstellar Medium ◽  
3D Structure ◽  
Global Scale ◽  
The Sun ◽  
Los Alamos ◽  
Structure And Dynamics ◽  
Medium System

scholarly journals The Local Bubble: a magnetic veil to our Galaxy

2018 ◽  
Vol 611 ◽  
pp. L5 ◽  
Author(s):  
M. I. R. Alves ◽  
F. Boulanger ◽  
K. Ferrière ◽  
L. Montier
Keyword(s):  
Magnetic Field ◽  
Interstellar Medium ◽  
Large Scale ◽  
3D Structure ◽  
Local Magnetic Field ◽  
The Sun ◽  
Local Interstellar Medium ◽  
Galactic Magnetic Field ◽  
Local Bubble ◽  
The Magnetic Field

The magnetic field in the local interstellar medium does not follow the large-scale Galactic magnetic field. The local magnetic field has probably been distorted by the Local Bubble, a cavity of hot ionized gas extending all around the Sun and surrounded by a shell of cold neutral gas and dust. However, so far no conclusive association between the local magnetic field and the Local Bubble has been established. Here we develop an analytical model for the magnetic field in the shell of the Local Bubble, which we represent as an inclined spheroid, off-centred from the Sun. We fit the model to Planck dust polarized emission observations within 30° of the Galactic poles. We find a solution that is consistent with a highly deformed magnetic field, with significantly different directions towards the north and south Galactic poles. This work sets a methodological framework for modelling the three-dimensional (3D) structure of the magnetic field in the local interstellar medium, which is a most awaited input for large-scale Galactic magnetic field models.

scholarly journals Observations of Local Interstellar Mg I and Mg II

1984 ◽  
Vol 81 ◽  
pp. 64-66 ◽  
Author(s):  
F. Bruhweiler ◽  
W. Oegerle ◽  
E. Weiler ◽  
R. Stencel ◽  
Y. Kondo
Keyword(s):  
High Resolution ◽  
Interstellar Medium ◽  
The Sun ◽  
Local Interstellar Medium ◽  
Upper Limits

AbstractWe have combined Copernicus and IUE observations of 5 stars within 50 pc of the Sun to study the ionization of magnesium in the local interstellar medium (LISM). The high resolution Copernicus spectrometer was used to detect interstellar Mg I 2852 in the spectra of α Gru, α Eri, and α Lyr, while placing upper limits on Mg I in the spectra of α CMa and α PsA. Observations of Mg II 2795, 2802 for these stars were also obtained with IUE and Copernicus. The column densities of Mg I and Mg II are used to place constraints on the temperature of the LISM.

scholarly journals 3D structure and dynamics of filaments in turbulence simulations of WEST diverted plasmas

2019 ◽  
Vol 59 (9) ◽  
pp. 096006 ◽  
Author(s):  
F. Nespoli ◽  
P. Tamain ◽  
N. Fedorczak ◽  
G. Ciraolo ◽  
D. Galassi ◽  
...  
Keyword(s):  
3D Structure ◽  
Structure And Dynamics

scholarly journals Heating of the Interstellar Medium by Supernova Remnants

1983 ◽  
Vol 101 ◽  
pp. 385-392
Author(s):  
Donald P. Cox
Keyword(s):  
Interstellar Medium ◽  
Supernova Remnants ◽  
Supernova Remnant ◽  
Low Density ◽  
The Sun ◽  
X Ray ◽  
Interstellar Material ◽  
X Ray Background

We observe the heating of interstellar material in young supernova remnants (SNR). In addition, when analyzing the soft X-ray background we find evidence for large isolated regions of apparently hot, low density material. These, we infer, may have been heated by supernovae. One such region seems to surround the Sun. This has been modeled as a supernova remnant viewed from within. The most reasonable parameters are ambient density no ~ 0.004 cm−3, radius of about 100 pc, age just over 105 years (Cox and Anderson 1982).

Global circulation of Mars’ upper atmosphere

Science ◽  
2019 ◽  
Vol 366 (6471) ◽  
pp. 1363-1366 ◽  
Author(s):  
M. Benna ◽  
S. W. Bougher ◽  
Y. Lee ◽  
K. J. Roeten ◽  
E. Yiğit ◽  
...  
Keyword(s):  
Gravity Waves ◽  
Incident Energy ◽  
Upper Atmosphere ◽  
The Sun ◽  
Mars Atmosphere ◽  
Neutral Winds ◽  
Global Circulation ◽  
Structure And Dynamics ◽  
Circulation Patterns

The thermosphere of Mars is the interface through which the planet is continuously losing its reservoir of atmospheric volatiles to space. The structure and dynamics of the thermosphere is driven by a global circulation that redistributes the incident energy from the Sun. We report mapping of the global circulation in the thermosphere of Mars with the Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft. The measured neutral winds reveal circulation patterns simpler than those of Earth that persist over changing seasons. The winds exhibit pronounced correlation with the underlying topography owing to orographic gravity waves.

scholarly journals VII. The Sun as a Star

1985 ◽  
Vol 19 (1) ◽  
pp. 117-119
Author(s):  
K. R. Sivaraman
Keyword(s):  
White Light ◽  
Solar Irradiance ◽  
Global Scale ◽  
The Sun ◽  
Current Interest

An important topic of current interest both in solar and stellar physics is the possibility of identifying solar phenomena in stars through an understanding of these on a global scale on the sun. We concentrate here on the recent research concerning the variability in solar irradiance from disc integrated observations (sun as a star) in the white light as well as in monochromatic wavelengths.

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