Results 51 to 60 of about 57,383 (218)

Absorption-line Observations of and CO in Sight Lines Toward the Vela and W28 Supernova Remnants

The Astrophysical Journal, 2023
Supernova remnants act as particle accelerators, providing the cosmic-ray protons that permeate the interstellar medium and initiate the ion–molecule reactions that drive interstellar chemistry. Enhanced fluxes of cosmic-ray protons in close proximity to
Nick Indriolo
doaj   +1 more source

Nitrogen hydrides in interstellar gas: Herschel/HIFI observations towards G10.6-0.4 (W31C) [PDF]

, 2010
The HIFI instrument on board the Herschel Space Observatory has been used to observe interstellar nitrogen hydrides along the sight-line towards G10.6−0.4 in order to improve our understanding of the interstellar chemistry of nitrogen.
Bell, T. A., Lis, D. C., Lord, S., Monje, R., Morris, P., Persson, C. M., Phillips, T. G.   +6 more
core  

Stellar abundances and molecular hydrogen in high-redshift galaxies -the far-ultraviolet view

, 2006
FUSE spectra of star-forming regions in nearby galaxies are compared to composite spectra of Lyman-break galaxies (LBGs), binned by strength of Lyman alpha emission and by mid-UV luminosity.
Hoopes C. G., Maeder A., Testor G., Trimble V., Vilchez J. M., William C. Keel   +5 more
core   +1 more source

The Physical Characteristics of the Small-Scale Interstellar Structure towards Mu Crucis [PDF]

, 1998
We present HST/GHRS echelle observations of multiple interstellar lines of CI, MgI, CrII, and ZnII towards both stars in the mu Cru binary system. Despite large differences in the profiles of the neutral species, no significant variations between the ...
David M. Meyer, Davis R. J., J. C. Blades, J. T. Lauroesch, John K. Watson, Pequignot D.   +5 more
core   +2 more sources

Interstellar absorption lines in the galaxy NGC 1705

The Astrophysical Journal, 1990
The possibility is considered, and shown to be plausible, that the strong C IV and Si IV absorption lines in low-resolution ultraviolet spectra of gas-rich dwarf galaxies are primarily interstellar, not stellar as has been supposed. The argument is based on analogies with H II regions in the Local Group, on low-resolution equivalent width measurements ...
D. G. York, A. Caulet, P. Rybski, J. Gallagher, J. C. Blades, D. C. Morton, W. Wamsteker   +6 more
openaire   +1 more source

Influence of Mars Topography on Radiation Dose Detected by the Mars Science Laboratory and Assessment of Mars Surface Albedo Radiation

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract The Radiation Assessment Detector (RAD) on the Curiosity rover has been characterizing the Martian surface radiation field since 2012. The dose observed by RAD is influenced by a variety of factors, including an essential one, the terrain. After parking near Murray Buttes in September 2016 where it first detected a ∼5% decrease in dose rate ...
Jingnan Guo, Changqi Tian, Gabin Charpentier, Robert F. Wimmer‐Schweingruber, Salman Khaksarighiri, Lu Pan, Jan Leo Löwe, Bent Ehresmann, Donald M. Hassler, Cary Zeitlin, Daniel Matthiä, Thomas Berger, Günther Reitz   +12 more
wiley   +1 more source

H i Kinematics and the E(B − V)/N(H i) Ratio

The Astrophysical Journal
The λ 21 cm H i emission that is used to trace the gas-to-dust ratio at high Galactic latitudes has contributions from material beyond the Milky Way disk, with uncertain and likely subsolar metallicity and dust content.
Harvey Liszt
doaj   +1 more source

The interstellar medium of the Magellanic Clouds from absorption lines [PDF]

Symposium - International Astronomical Union, 1991
General aspects of ISM studies using absorption line studies are given and available data are reviewed. Topics are: galactic foreground gas, individual fields in the Magellanic Clouds (MCs) and MC coronae. Overall investigations are discussed. It is demonstrated that the metals in the gas of the Large Magellanic Cloud (LMC) and Small Magellanic Cloud ...
openaire   +1 more source

Spatially Resolved Comparison of SFRs from UV and Hα in GASP Gas-stripped Galaxies

The Astrophysical Journal
Star formation rates (SFRs) in galaxies offer a view of various physical processes across them, and are measured using various tracers, such as H α and ultraviolet (UV).
Neven Tomičić, Ariel Werle, Benedetta Vulcani, Alessandro Ignesti, Alessia Moretti, Anna Wolter, Koshy George, Bianca M. Poggianti, Marco Gullieuszik   +8 more
doaj   +1 more source

Spectroscopic Observations of Lyman-Break Galaxies at Redshift ~ 4, 5 and 6 in the GOODS-South Field

, 2009
We report on observations of Lyman-break galaxies (LBGs) selected from the Great Observatories Origins Deep Survey at mean redshift z~4, 5 and 6, obtained with FORS2 spectrograph at the ESO-VLT.This program has yielded spectroscopic identifications for ...
Cesarsky, C., Cristiani, S., Dickinson, M., Ferguson, H. C., Fosbury, R. A. E., Giavalisco, M., Kuntschner, H., Nonino, M., Popesso, P., Renzini, A., Rosati, P., Stern, D., Team, the GOODS, Vanzella, E.   +13 more
core   +1 more source