Results 21 to 30 of about 67,060 (301)

Ultraviolet Astronomy [PDF]

Highlights of Astronomy, 1968
Ultraviolet astronomy is in a phase of very rapid development and any review of the new techniques involved is necessarily conditioned by the fact that most of the work is in a preparatory stage. This paper, therefore, will not be restricted to a discussion of those techniques which have undergone the ultimate test of their effectiveness, i.e., an ...
openaire   +1 more source

The radial velocity curve of HD153919 (4U1700-37) revisited [PDF]

, 2003
We have re-analysed all available high-resolution ultraviolet IUE spectra of the high-mass X-ray binary HD153919/4U1700-37. The radial velocity semi-amplitude of 20.6 +/- 1.0 km/s and orbital eccentricity of 0.22 +/- 0.04 agree very well with the values ...
Ankay, Barziv, Clark, Conti, Evans, G. Hammerschlag-Hensberge, Gies, Haberl, Hammerschlag-Hensberge, Hammerschlag-Hensberge, Heap, Humphreys, Jones, Kaper, Kaper, Kaper, L. Kaper, M. H. van Kerkwijk, Quaintrell, Rubin, Stickland, Stickland, Van Kerkwijk, Van Kerkwijk, Van Paradijs, Zuiderwijk   +25 more
core   +4 more sources

The Colorado Ultraviolet Transit Experiment Mission Overview

The Astronomical Journal, 2023
Atmospheric escape is a fundamental process that affects the structure, composition, and evolution of many planets. The signatures of escape are detectable on close-in, gaseous exoplanets orbiting bright stars, owing to the high levels of extreme ...
Kevin France, Brian Fleming, Arika Egan, Jean-Michel Desert, Luca Fossati, Tommi T. Koskinen, Nicholas Nell, Pascal Petit, Aline A. Vidotto, Matthew Beasley, Nicholas DeCicco, Aickara Gopinathan Sreejith, Ambily Suresh, Jared Baumert, P. Wilson Cauley, Carolina Villarreal D’Angelo, Keri Hoadley, Robert Kane, Richard Kohnert, Julian Lambert, Stefan Ulrich   +20 more
doaj   +1 more source

A Giant Planet Undergoing Extreme-Ultraviolet Irradiation By Its Hot Massive-Star Host [PDF]

, 2017
The amount of ultraviolet irradiation and ablation experienced by a planet depends strongly on the temperature of its host star. Of the thousands of extrasolar planets now known, only six have been found that transit hot, A-type stars (with temperatures ...
Bayliss, D., Beatty, T. G., Bieryla, A., Bozza, V., Buchhave, L. A., Collins, K. A., Colón, K. D., Crepp, J. R., Curtis, I. A., DePoy, D. L., Dumont, M. T., D’Ago, G., Eastman, J. D., Ellis, T., Esquerdo, G. A., Fukui, A., Fulton, B. J., Gaillard, C., Gaudi, B. S., Gonzales, E. J., Gould, A., Gregorio, J., Howard, A. W., Ito, A., James, D. J., Jang-Condell, H., Jensen, Eric L.N., Johnson, M. C., Joner, M. D., Kasper, D. H., Kielkopf, J. F., Kuhn, R. B., Labadie-Bartz, J., Latham, D. W., Lund, M. B., Manner, M., Marshall, J. L., Matt, K., McLeod, K. K., Narita, N., Novati, S. C., Oberst, T. E., Penny, M., Pepper, J., Pogge, R. W., Reed, P. A., Relles, H., Rodriguez, J. E., Scarpetta, G., Siverd, R. J., Stassun, K. G., Stephens, D. C., Stevens, D. J., Stockdale, C., Tan, T. G., Trueblood, M., Trueblood, P., Yeigh, R. R., Zambelli, R., Zhou, G.   +59 more
core   +3 more sources

Research in extreme ultraviolet and far ultraviolet astronomy [PDF]

Analysis and interpretation continued on data generated by the flight of 27.086 in April of 1986 and by the successful UVX mission. Optical and mechanical design of the 1 meter EUV telescope, planned for launch with the large SPARTAN type carrier, ASTRO ...
Bowyer, C. S.
core   +7 more sources

Overview of the Far Ultraviolet Spectroscopic Explorer Mission [PDF]

, 2000
The Far Ultraviolet Spectroscopic Explorer satellite observes light in the far-ultraviolet spectral region, 905 - 1187 A with high spectral resolution.
A. F. Davidsen, A. G. Michalitsianos, A. J. Willis, A. K. Dupree, A. N. Cha, A. Vidal-Madjar, A. W. Fullerton, B-G Andersson, B. D. Savage, B. E. Woodgate, B. Y. Welsh, Broadfoot A. L., C. Gry, C. L. Morbey, C. Oliveira, D. G. York, D. J. Sahnow, D. K. McCarthy, D. Mark, E. B. Jenkins, E. M. Murphy, E. Wilkinson, G. A. Gaines, G. A. Kriss, G. Hebrard, G. Sonneborn, Grange R., H. A. Weaver, H. W. Moos, J. B. Hutchings, J. C. Green, J. L. Linsky, J. M. Shull, J. P. Andrews, J. W. Kruk, K. R. Brownsberger, K. R. Sembach, L. Bianchi, L. L. Cowie, M. A. Gummin, M. Saisse, O. H. W. Siegmund, P. Chayer, P. D. Feldman, R. F. Green, R. F. Malina, R. G. Ohl, R. Grange, R. H. Barkhouser, R. Murowinski, S. D. Friedman, S. J. Conard, S. N. Osterman, T. B. Ake, T. P. Snow, W. C. Cash, W. P. Blair, W. R. Oegerle, W. Zheng   +58 more
core   +2 more sources

Nonequilibrium Ionization Modeling of Petschek-type Shocks in Reconnecting Current Sheets in Solar Eruptions

The Astrophysical Journal, 2023
Nonequilibrium ionization (NEI) is essentially required for astrophysical plasma diagnostics once the plasma status departs from the assumption of ionization equilibrium.
Chengcai Shen, John C. Raymond, Nicholas A. Murphy   +2 more
doaj   +1 more source

Extreme Ultraviolet Astronomy

Annual Review of Astronomy and Astrophysics, 2000
▪ Abstract  Astronomical studies in the extreme ultraviolet (EUV) band of the spectrum were dismissed during the early years of space astronomy as impossible, primarily because of the mistaken view that radiation in this band would be absorbed by the interstellar medium.
Bowyer, Stuart, Drake, Jeremy J, Vennes, Stephane   +2 more
openaire   +2 more sources

Interpreting the Si ii and C ii Line Spectra from the COS Legacy Archive Spectroscopic SurveY Using a Virtual Galaxy from a High-resolution Radiation-hydrodynamic Simulation

The Astrophysical Journal, 2023
Observations of low-ionization state metal lines provide crucial insights into the interstellar medium (ISM) of galaxies, yet, disentangling the physical processes responsible for the emerging line profiles is difficult.
Simon Gazagnes, Valentin Mauerhofer, Danielle A. Berg, Jeremy Blaizot, Anne Verhamme, Thibault Garel, Dawn K. Erb, Karla Z. Arellano-Córdova, Jarle Brinchmann, John Chisholm, Matthew Hayes, Alaina Henry, Bethan L. James, Anne Jaskot, Nika Jurlin, Crystal L. Martin, Michael Maseda, Claudia Scarlata, Evan D. Skillman, Stephen M. Wilkins, Aida Wofford, Xinfeng Xu   +21 more
doaj   +1 more source

Discovery of 20 UV-emitting SNRs in M31 with UVIT

The Astronomical Journal, 2023
We present the first catalog of supernova remnants (SNRs) in M31 that exhibit diffuse ultraviolet (UV) emission. UV images of M31 were obtained by the Ultraviolet Imaging Telescope (UVIT) on the AstroSat satellite, and the list of SNRs was obtained from ...
Denis Leahy, Christopher Monaghan, Sujith Ranasinghe   +2 more
doaj   +1 more source