Results 91 to 100 of about 136,681 (287)

Ultraviolet observations of interstellar absorption lines toward SN 1987A

The Astrophysical Journal, 1989
High-dispersion IUE echelle spectra of SN 1987A were averaged in order to obtain UV absorption-line profiles of the highest possible quality in the direction of SN 1987A. The profiles for Si IV and C IV are quite similar and have much less structure than the Al III profile.
Blair D. Savage, Edward B. Jenkins, Charles L. Joseph, Klass S. de Boer   +3 more
openaire   +1 more source

Molecules in the transition disk orbiting T Cha

, 2013
We seek to establish the presence and properties of gas in the circumstellar disk orbiting T Cha, a nearby (d~110 pc), relatively evolved (age ~5-7 Myr) yet actively accreting 1.5 Msun T Tauri star.
Forveille, T., Hily-Blant, P., Kastner, J. H., Montez Jr., R., Principe, D., Sacco, G. G., Zuckerman, B.   +6 more
core   +1 more source

The λ6614 diffuse interstellar absorption band: evidence for internal excitation of the carrier [PDF]

, 2015
An analysis of absorption profiles of the $\lambda$6614 diffuse interstellar band recorded along the lines-of-sight towards HD 179406 (20 Aql) and HD 147889 is described.
C. Marshall, J. Krełowski, P. Sarre
semanticscholar   +1 more source

Writing Against Fate: Climate Strategies and Subversions in Kim Stanley Robinson's The Ministry for the Future

Future Humanities, Volume 3, Issue 2, November 2025.
ABSTRACT Climate fiction's dominant futurist imaginaries trend towards resolved futures, particularly in apocalyptic and techno‐utopian representations of our climate futures. These closure‐driven narratives treat the future as a fated, distant event, limiting climate fiction's interrogation of human agency, responsibility, and potential action in the ...
Maryn Gardner
wiley   +1 more source

The Distance to the S147 Supernova Remnant

The Astrophysical Journal
In the absence of a parallax distance to a pulsar or a surviving binary in a supernova remnant (SNR), distances to Galactic SNRs are generally very uncertain.
C. S. Kochanek, John C. Raymond, Nelson Caldwell   +2 more
doaj   +1 more source

Eta Carinae: The Dissipating Occulter Is an Extended Structure

The Astrophysical Journal, 2023
Previous Hubble Space Telescope (HST)/Space Telescope Imaging Spectrograph (STIS) longslit observations of Eta Carinae ( η Car) identified numerous absorption features in both the stellar spectrum, and in the adjacent nebular spectra, along our line of ...
Theodore R. Gull, Henrik Hartman, Mairan Teodoro, D. John Hillier, Michael F. Corcoran, Augusto Damineli, Kenji Hamaguchi, Thomas Madura, Anthony F. J. Moffat, Patrick Morris, Krister Nielsen, Noel D. Richardson, Ian R. Stevens, Gerd Weigelt   +13 more
doaj   +1 more source

Observations of Small Scale ISM Structure in Dense Atomic Gas

, 1999
We present high resolution (R~170,000) Kitt Peak National Observatory Co'ude Feed telescope observations of the interstellar KI 7698 angstrom line towards 5 multiple star systems with saturated NaI components.
David M. Meyer, Davis R. J., J. T. Lauroesch, Mar D. P., Pequignot D.   +4 more
core   +2 more sources

Correlation Patterns of Muon Flux With Vertical Atmospheric Profiles: Insights From Monte Carlo Simulations

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract The production, attenuation, and absorption of secondary cosmic rays (SCR) are influenced by atmospheric parameters such as air pressure and temperature. To reliably correlate SCR flux measurements with atmospheric ionization driven by energetic particle precipitation, these dependencies must be quantified.
A. Al‐Qaaod, V. Pierrard, A. Winant, U. Stolzenberg, I. Ambrozova, M. Sommer, J. Slegl, J. Solc, A. Gkikoudi, A. G. Georgakilas, A. Papayannis, F. S. Krasniqi   +11 more
wiley   +1 more source

Discovery of Hydrogen Radio Recombination Lines at z = 0.89 toward PKS 1830-211

The Astrophysical Journal, 2023
We report the detection of stimulated hydrogen radio recombination line (RRL) emission from ionized gas in a z = 0.89 galaxy using 580–1670 MHz observations from the MeerKAT Absorption Line Survey.
Kimberly L. Emig, Neeraj Gupta, Pedro Salas, Sébastien Muller, Sergei A. Balashev, Françoise Combes, Emmanuel Momjian, Yiqing Song, Preshanth Jagannathan, Partha P. Deka, Gyula I. G. Józsa, Hans-Rainer Klöckner, Abhisek Mohapatra, Pasquier Noterdaeme, Patrick Petitjean, Raghunathan Srianand, Jonah D. Wagenveld   +16 more
doaj   +1 more source

Interstellar ultraviolet absorption lines and galactic X-ray sources

The Astrophysical Journal, 1977
X-ray photoionization can create zones of highly ionized trace elements in the interstellar gas around a galactic X-ray source. Ultraviolet absorption lines due to the resulting ionic column densities may be observable and may provide information on the environment and age of the X-ray source.
R. McCray, C. Wright, S. Hatchett
openaire   +1 more source