scholarly journals The role of PAHs in the physics of the interstellar medium

2011 ◽  
Vol 46 ◽  
pp. 415-426 ◽  
Author(s):  
L. Verstraete
Keyword(s):  
Interstellar Medium

scholarly journals The Role of the Parker Instability in Structuring the Interstellar Medium

2020 ◽  
Vol 891 (2) ◽  
pp. 157 ◽  
Author(s):  
Evan Heintz ◽  
Chad Bustard ◽  
Ellen G. Zweibel
Keyword(s):  
Interstellar Medium

scholarly journals First Results from the Submillimeter Wave Astronomy Satellite – H2O and O2 Discoveries

2000 ◽  
Vol 197 ◽  
pp. 161-174
Author(s):  
Gary J. Melnick
Keyword(s):  
Interstellar Medium ◽  
Ground State ◽  
Molecular Clouds ◽  
Submillimeter Wave ◽  
Important Species ◽  
First Results ◽  
One Year

The Submillimeter Wave Astronomy Satellite (SWAS) was successfully launched on 5 December 1998 with the goals of studying: (1) the distribution of oxygen in the interstellar medium; (2) the role of H2O and O2 as gas coolants; and (3) the UV-illuminated surfaces of molecular clouds. To achieve these goals, SWAS is conducting pointed observations of dense (n(H2) > 103 cm–3) molecular clouds throughout our Galaxy in either the ground-state or a low-lying transition of five astrophysically important species: H2O, H218O, O2, CI, and 13CO. SWAS has made great strides in each of these areas of investigation. This paper will summarize our H2O and O2 findings one year into the mission.

scholarly journals The 12C/13C Ratio in Interstellar Dark Clouds

1980 ◽  
Vol 87 ◽  
pp. 411-416
Author(s):  
W.H. Mccutcheon ◽  
R. L. Dickman ◽  
W.L.H. Shuter ◽  
R. S. Roger
Keyword(s):  
Radiative Transfer ◽  
Interstellar Medium ◽  
Stellar Evolution ◽  
Transfer Problem ◽  
Abundance Ratio ◽  
Radiative Transfer Problem ◽  
Dark Clouds ◽  
Non Equilibrium

Since 13C is believed to be produced by non-equilibrium CNO processing in stellar evolution (Truran 1977), measurements of the carbon ratio Rc ≡ [12C] / [13C] in the interstellar medium may provide important information on nucleo-synthesis. Commonly, the ratio (N13/N18)LTE ≡ [13CO/C18O]LTE is measured and from this RLTE ≡ [12CO/13CO]LTE is deduced and these values are often identified with Rc. However, this line of reasoning can be misleading for two reasons (Dickman et al. 1979):(1) The difficulty of determining accurate column densities, [13C16O] and [12C18O], because of the complexity of the radiative transfer problem;(2) The possible role of fractionation, whereby RCO ≡ [12CO] / [13CO] does not necessarily reflect the initial atomic abundance ratio RC (Watson et al. 1976, Langer 1977, Liszt 1978).

scholarly journals Sh 2-68 – A Planetary Nebula Leaving it's Mark on the Interstellar Medium

2003 ◽  
Vol 209 ◽  
pp. 525-526 ◽  
Author(s):  
F. Kerber ◽  
F. Guglielmetti ◽  
R. Mignani ◽  
M. Roth
Keyword(s):  
Interstellar Medium ◽  
Planetary Nebula ◽  
Galactic Disk ◽  
Central Star ◽  
Main Body ◽  
Left Behind ◽  
Sky Survey ◽  
Cometary Tail ◽  
Direct Confirmation

Using Hα images from the Southern H-Alpha Sky Survey Atlas (SHASSA) we have discovered a “cometary tail” of ionized matter extending at least 30 arcmin from the main body of the planetary nebula Sh 2-68 (PN G030.6+06.2). This tail is aligned with the proper motion of the central star and is obviously a contrail of material left behind by Sh 2-68 moving in a Galactic Disk orbit. The tail's existence is a direct confirmation of Sh 2-68's interaction with the interstellar medium (ISM) and highlights the possibly important role of the ISM's magnetic field.

scholarly journals Dust formation history of galaxies: A critical role of metallicity dust mass growth by accreting materials in the interstellar medium

2013 ◽  
Vol 65 (3) ◽  
pp. 213-222 ◽  
Author(s):  
Ryosuke S. Asano ◽  
Tsutomu T. Takeuchi ◽  
Hiroyuki Hirashita ◽  
Akio K. Inoue
Keyword(s):  
Interstellar Medium ◽  
Critical Role ◽  
Dust Formation ◽  
Mass Growth ◽  
Formation History ◽  
Dust Mass ◽  
History Of

scholarly journals The role of feedback in shaping the structure of the interstellar medium

2014 ◽  
Vol 441 (1) ◽  
pp. 525-531 ◽  
Author(s):  
A. P. Walker ◽  
B. K. Gibson ◽  
K. Pilkington ◽  
C. B. Brook ◽  
P. Dutta ◽  
...  
Keyword(s):  
Interstellar Medium

Physics of the Solar Wind–Local Interstellar Medium Interaction: Role of Magnetic Fields

2009 ◽  
Vol 146 (1-4) ◽  
pp. 295-327 ◽  
Author(s):  
G. P. Zank ◽  
N. V. Pogorelov ◽  
J. Heerikhuisen ◽  
H. Washimi ◽  
V. Florinski ◽  
...  
Keyword(s):  
Solar Wind ◽  
Magnetic Fields ◽  
Interstellar Medium ◽  
Local Interstellar Medium

scholarly journals THE ROLE OF THE MAGNETIC FIELD IN THE INTERSTELLAR MEDIUM OF THE POST-STARBURST DWARF IRREGULAR GALAXY NGC 1569

2010 ◽  
Vol 712 (1) ◽  
pp. 536-557 ◽  
Author(s):  
Amanda A. Kepley ◽  
Stefanie Mühle ◽  
John Everett ◽  
Ellen G. Zweibel ◽  
Eric M. Wilcots ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Interstellar Medium ◽  
Irregular Galaxy ◽  
The Magnetic Field ◽  
Ngc 1569
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