scholarly journals High‐Resolution Ultraviolet Spectra of the Dwarf Seyfert 1 Galaxy NGC 4395: Evidence for Intrinsic Absorption

2004 ◽  
Vol 612 (1) ◽  
pp. 152-158 ◽  
Author(s):  
D. M. Crenshaw ◽  
S. B. Kraemer ◽  
J. R. Gabel ◽  
H. R. Schmitt ◽  
A. V. Filippenko ◽  
...  
Keyword(s):  
High Resolution ◽  
Ultraviolet Spectra ◽  
Intrinsic Absorption ◽  
Ngc 4395

High‐Resolution X‐Ray and Ultraviolet Spectroscopy of the Complex Intrinsic Absorption in NGC 4051 withChandraand theHubble Space Telescope

2001 ◽  
Vol 557 (1) ◽  
pp. 2-17 ◽  
Author(s):  
M. J. Collinge ◽  
W. N. Brandt ◽  
Shai Kaspi ◽  
D. Michael Crenshaw ◽  
Martin Elvis ◽  
...  
Keyword(s):  
High Resolution ◽  
Ultraviolet Spectroscopy ◽  
Space Telescope ◽  
X Ray ◽  
Intrinsic Absorption ◽  
Ngc 4051

scholarly journals IUE Ultraviolet Spectra of the Interacting Binary U Cephei

1980 ◽  
Vol 88 ◽  
pp. 237-241
Author(s):  
Yoji Kondo ◽  
George E. McCluskey ◽  
Robert E. Stencel
Keyword(s):  
High Resolution ◽  
Ultraviolet Light ◽  
Stellar Evolution ◽  
Binary Systems ◽  
Light Curves ◽  
Close Binary ◽  
Eclipsing Binary ◽  
Ultraviolet Spectra ◽  
International Ultraviolet Explorer ◽  
Far Ultraviolet

The eclipsing binary U Cephei has proven to be of great interest in the study of stellar evolution in close binary systems. Batten (1974), Hall and Walter (1974), Rhombs and Fix (1976), Markworth (1977), and Olson (1978), among others, have recently reported on their intensive ground based studies of U Cephei. Kondo, McCluskey and Wu (1978) have investigated the ultraviolet light curves of U Cephei obtained with Astronomical Netherlands Satellite (ANS). Kondo, McCluskey and Stencel (1979) have discussed the International Ultraviolet Explorer (IUE) spectra of U Cephei. This paper discusses results incorporating additional IUE high resolution spectra of U Cephei obtained in both far-ultraviolet and mid-ultraviolet spectral regions.

High-resolution ultraviolet spectra of sympathetically-laser-cooledCd+ions

1996 ◽  
Vol 53 (1) ◽  
pp. 122-125 ◽  
Author(s):  
Hidetsuka Imajo ◽  
Kazuhiro Hayasaka ◽  
Ryuzo Ohmukai ◽  
Utako Tanaka ◽  
Masayoshi Watanabe ◽  
...  
Keyword(s):  
High Resolution ◽  
Ultraviolet Spectra

The Dynamical State of the Atmosphere of the Supergiant Alpha Cygni (A2 Iae) Derived from High-Resolution Ultraviolet Spectra

1988 ◽  
Vol 102 ◽  
pp. 383-386
Author(s):  
B. Boer ◽  
C. de Jager ◽  
H. Nieuwenhuijzen
Keyword(s):  
High Resolution ◽  
Velocity Profile ◽  
Optical Depth ◽  
Velocity Component ◽  
Line Of Sight ◽  
Velocity Of Sound ◽  
Ultraviolet Spectra ◽  
Dynamical State ◽  
Microturbulent Velocity ◽  
Visible Disk

AbstractIn order to study the apparent near instability of supergiant atmospheres high-resolution (λ/Δ λ = 8×104) BUSS (Balloon-borne Ultraviolet Stellar Spectrometer) spectra of the supergiant Alpha Cyg have been investigated. Equivalent widths of lines yield the variation of the line-of-sight microturbulent velocity component ζµwith optical depth τ. We find at τ5= 0.1: ζµequal to the velocity of sound. The consequent turbulent acceleration is directed outward, it increases outward and is about half the effective acceleration at τ5= 0.01. The macroturbulent velocity profile is double peaked with up- and downward velocities of 14 km s−1. We suggest that these motions are stochastic pulsations of large elements. At any time there are 30 to 40 such elements on the visible disk.

First results from the Goddard High-Resolution Spectrograph - Ultraviolet spectra of a starburst knot in NGC 1068

1991 ◽  
Vol 377 ◽  
pp. L25 ◽  
Author(s):  
J. B. Hutchings ◽  
F. Bruhweiler ◽  
A. Boggess ◽  
S. R. Heap ◽  
D. Ebbets ◽  
...  
Keyword(s):  
High Resolution ◽  
Ultraviolet Spectra ◽  
First Results ◽  
Ngc 1068

scholarly journals Intrinsic Absorption Lines in Seyfert 1 Galaxies. I. Ultraviolet Spectra from theHubble Space Telescope

1999 ◽  
Vol 516 (2) ◽  
pp. 750-768 ◽  
Author(s):  
D. Michael Crenshaw ◽  
Steven B. Kraemer ◽  
Albert Boggess ◽  
Stephen P. Maran ◽  
Richard F. Mushotzky ◽  
...  
Keyword(s):  
Absorption Lines ◽  
Space Telescope ◽  
Ultraviolet Spectra ◽  
Intrinsic Absorption

scholarly journals A census of quasar-intrinsic absorption in the Hubble Space Telescope archive: systems from high-resolution echelle spectra★

2013 ◽  
Vol 435 (2) ◽  
pp. 1233-1264 ◽  
Author(s):  
Rajib Ganguly ◽  
Ryan S. Lynch ◽  
Jane C. Charlton ◽  
Michael Eracleous ◽  
Todd M. Tripp ◽  
...  
Keyword(s):  
High Resolution ◽  
Hubble Space Telescope ◽  
Space Telescope ◽  
Intrinsic Absorption

High‐Resolution Spectra of Intrinsic Absorption Lines in the Quasi‐stellar Object UM 675

1997 ◽  
Vol 478 (1) ◽  
pp. 80-86 ◽  
Author(s):  
Fred Hamann ◽  
Thomas A. Barlow ◽  
Vesa Junkkarinen ◽  
E. M. Burbidge
Keyword(s):  
High Resolution ◽  
Stellar Object ◽  
Absorption Lines ◽  
Intrinsic Absorption
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