scholarly journals Characterization of the Far‐ultraviolet Spectrum of Pt/Cr‐Ne Hollow Cathode Lamps as Used on the Space Telescope Imaging Spectrograph on Board the Hubble Space Telescope

2004 ◽  
Vol 153 (2) ◽  
pp. 555-579 ◽  
Author(s):  
Craig J. Sansonetti ◽  
F. Kerber ◽  
Joseph Reader ◽  
M. R. Rosa
Keyword(s):  
Hollow Cathode ◽  
Hubble Space Telescope ◽  
Ultraviolet Spectrum ◽  
Space Telescope ◽  
Far Ultraviolet ◽  
Imaging Spectrograph

scholarly journals The far-ultraviolet main auroral emission at Jupiter – Part 2: Vertical emission profile

2015 ◽  
Vol 33 (10) ◽  
pp. 1211-1219 ◽  
Author(s):  
B. Bonfond ◽  
J. Gustin ◽  
J.-C. Gérard ◽  
D. Grodent ◽  
A. Radioti ◽  
...  
Keyword(s):  
Hubble Space Telescope ◽  
Total Power ◽  
Space Telescope ◽  
Auroral Emission ◽  
Ultraviolet Range ◽  
Auroral Emissions ◽  
Generation Mechanisms ◽  
Far Ultraviolet ◽  
Advanced Camera For Surveys ◽  
Imaging Spectrograph

Abstract. The aurorae at Jupiter are made up of many different features associated with a variety of generation mechanisms. The main auroral emission, also known as the main oval, is the most prominent of them as it accounts for approximately half of the total power emitted by the aurorae in the ultraviolet range. The energy of the precipitating electrons is a crucial parameter to characterize the processes at play which give rise to these auroral emissions, and the altitude of the emissions directly depends on this energy. Here we make use of far-UV (FUV) images acquired with the Advanced Camera for Surveys on board the Hubble Space Telescope and spectra acquired with the Space Telescope Imaging Spectrograph to measure the vertical profile of the main emissions. The altitude of the brightness peak as seen above the limb is ~ 400 km, which is significantly higher than the 250 km measured in the post-dusk sector by Galileo in the visible domain. However, a detailed analysis of the effect of hydrocarbon absorption, including both simulations and FUV spectral observations, indicates that FUV apparent vertical profiles should be considered with caution, as these observations are not incompatible with an emission peak located at 250 km. The analysis also calls for spectral observations to be carried out with an optimized geometry in order to remove observational ambiguities.

scholarly journals CO-to-H2 Abundance Ratio of the Foreground Gas of the Carina Nebula

2004 ◽  
Vol 217 ◽  
pp. 192-193
Author(s):  
Shinn Jong-Ho ◽  
Seon Kwang-Il ◽  
Lee Dae-Hee ◽  
Min Kyoung-Wook
Keyword(s):  
Absorption Band ◽  
Molecular Cloud ◽  
Hubble Space Telescope ◽  
Abundance Ratio ◽  
Hot Stars ◽  
Space Telescope ◽  
International Ultraviolet Explorer ◽  
Carina Nebula ◽  
Far Ultraviolet ◽  
Imaging Spectrograph

We analyze CO and H2 absorption lines of the foreground molecular cloud in the Carina nebula. We use HST-STIS (Hubble Space Telescope - Space Telescope Imaging Spectrograph) & IUE (International Ultraviolet Explorer) INES data to analyze the A-X (v=0→2) absorption band of CO for several hot stars toward the Carina nebula, while 9 stars of them have FUSE (Far Ultraviolet Spectroscopic Explorer) spectra to analyze the (v=0→4) vibrational band in the Lyman series of H2. The column densities of CO and H2 varies in the vicinity of N(CO) ~ 1013cm−2 and N(H2) ~ 1019cm−2, respectively. The resultant CO-to-H2 abundance ratio is about 10−6. We investigate the variation of the abundance ratio according to the relative position of the target stars to morphology the molecular cloud in the Carina nebula.

scholarly journals A Hubble Space Telescope STIS Observation of VW Hydri at the Exact Far-Ultraviolet Onset of an Outburst

2004 ◽  
Vol 614 (1) ◽  
pp. L61-L64 ◽  
Author(s):  
Edward M. Sion ◽  
F. H. Cheng ◽  
Boris T. Gänsicke ◽  
Paula Szkody
Keyword(s):  
Hubble Space Telescope ◽  
Space Telescope ◽  
Far Ultraviolet

Hubble Space Telescope far-ultraviolet imaging of M31, M32, and NGC 205

1995 ◽  
Vol 438 ◽  
pp. 680 ◽  
Author(s):  
F. Bertola ◽  
A. Bressan ◽  
D. Burstein ◽  
L. M. Buson ◽  
C. Chiosi ◽  
...  
Keyword(s):  
Hubble Space Telescope ◽  
Space Telescope ◽  
Far Ultraviolet

A Hubble Space Telescope ultraviolet spectrum of SN 1993J

1994 ◽  
Vol 421 ◽  
pp. L27 ◽  
Author(s):  
David J. Jeffery ◽  
Robert P. Kirshner ◽  
Peter M. Challis ◽  
Chun S. J. Pun ◽  
Alexei V. Filippenko ◽  
...  
Keyword(s):  
Hubble Space Telescope ◽  
Ultraviolet Spectrum ◽  
Space Telescope

scholarly journals [ITAL]Hubble Space Telescope[/ITAL] Space Telescope Imaging Spectrograph Imaging of the Host Galaxy of GRB 980425/SN 1998[CLC]bw[/CLC]

2000 ◽  
Vol 542 (2) ◽  
pp. L89-L93 ◽  
Author(s):  
J. U. Fynbo ◽  
S. Holland ◽  
M. I. Andersen ◽  
B. Thomsen ◽  
J. Hjorth ◽  
...  
Keyword(s):  
Hubble Space Telescope ◽  
Host Galaxy ◽  
Space Telescope ◽  
Imaging Spectrograph

scholarly journals The Interstellar Abundance of Lead: Experimental Oscillator Strengths for Pb ii λ1203 and λ1433 and New Detections of Pb ii in the Interstellar Medium

2015 ◽  
Vol 11 (A29A) ◽  
Author(s):  
A. M. Ritchey ◽  
N. Heidarian ◽  
R. E. Irving ◽  
S. R. Federman ◽  
D. G. Ellis ◽  
...  
Keyword(s):  
Interstellar Medium ◽  
Hubble Space Telescope ◽  
Oscillator Strengths ◽  
Interstellar Gas ◽  
Lifetime Measurements ◽  
Space Telescope ◽  
Interstellar Grains ◽  
Imaging Spectrograph ◽  
Theoretical Results ◽  
Beam Foil

AbstractWe present the first experimentally determined oscillator strengths for the Pb ii transitions at 1203.6 Å and 1433.9 Å, obtained from lifetime measurements made using beam-foil techniques. We also present new detections of these lines in the interstellar medium from an analysis of archival spectra acquired by the Space Telescope Imaging Spectrograph onboard the Hubble Space Telescope. Our observations of the Pb ii λ1203 line represent the first detection of this transition in interstellar gas. Our experimental f-values for the Pb ii λ1203 and λ1433 transitions are consistent with recent theoretical results, including our own relativistic calculations, but are significantly smaller than previous values based on older calculations. Our new f-value for Pb ii λ1433 (0.321 ± 0.034) yields an increase in the interstellar abundance of Pb of 0.43 dex over estimates based on the f-value listed by Morton. With our revised f-values, and with our new detections of Pb ii λ1203 and λ1433, we find that the depletion of Pb onto interstellar grains is not nearly as severe as previously thought, and is very similar to the depletions seen for elements such as Zn and Sn, which have similar condensation temperatures.

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