Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Davidsen, Arthur"'
Far-ultraviolet spectra of Venus and Mars in the range 820-1840 A at 4 A resolution were obtained on 13 and 12 March 1995, respectively, by the Hopkins Ultraviolet Telescope (HUT), which was part of the Astro-2 observatory on the Space Shuttle Endeav
Externí odkaz:
http://arxiv.org/abs/astro-ph/0004024
We have analyzed the broad absorption line system of the bright (V=16.5) high-redshift (z=2.361) QSO SBS1542+541 using UV spectra from the HST FOS along with optical data from the MMT and the Steward Observatory 2.3m telescope. These spectra give con
Externí odkaz:
http://arxiv.org/abs/astro-ph/9807182
Based on the empirical formulas governing the distribution of Ly-a forest absorption, we use a Monte-Carlo technique to calculate the average HeII optical depth produced by these forest lines. A substantial contribution to HeII absorption arises from
Externí odkaz:
http://arxiv.org/abs/astro-ph/9711143
Autor:
Bi, HongGuang, Davidsen, Arthur F.
Publikováno v:
Astrophys.J.479:523,1997
We have performed a detailed statistical study of the evolution of structure in a photoionized intergalactic medium (IGM) using analytical simulations to extend the calculation into the mildly non-linear density regime found to prevail at z = 3. Our
Externí odkaz:
http://arxiv.org/abs/astro-ph/9611062
The globular cluster M79 was observed with the Hopkins Ultraviolet Telescope (HUT) during the Astro-1 space shuttle mission in 1990 December. The cluster's far-UV integrated spectrum shows strong absorption in the Lyman lines of atomic hydrogen. We s
Externí odkaz:
http://arxiv.org/abs/astro-ph/9602057
Publikováno v:
Physics Today. May2002, Vol. 55 Issue 5, p78. 3p. 1 Black and White Photograph.
Autor:
Davidsen, Arthur F.
Publikováno v:
Science, 1993 Jan . 259(5093), 327-334.
Externí odkaz:
https://www.jstor.org/stable/2880916
Publikováno v:
Physics Today. Jul79, Vol. 32 Issue 7, p59. 2p.
Autor:
Blair, William P., Davidsen, Arthur F.
Publikováno v:
Publications of the Astronomical Society of the Pacific, 1993 May 01. 105(687), 494-500.
Externí odkaz:
https://www.jstor.org/stable/40680059
Autor:
Overbye, Dennis
Publikováno v:
New York Times. 7/22/2001, Vol. 150 Issue 51822, p34. 0p. 1 Black and White Photograph.