Hubble Space Telescope Ultraviolet Spectrum of ARP 102B, the Prototypical Double-peaked Emission-Line AGN

1996 ◽  
Vol 464 ◽  
pp. 704 ◽  
Author(s):  
Jules P. Halpern ◽  
Michael Eracleous ◽  
Alexei V. Filippenko ◽  
Kaiyou Chen
Keyword(s):  
Emission Line ◽  
Hubble Space Telescope ◽  
Ultraviolet Spectrum ◽  
Space Telescope

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

Emission Line Properties of Active Galactic Nuclei from a Post‐COSTAR Hubble Space Telescope Faint Object Spectrograph Spectral Atlas

2004 ◽  
Vol 150 (1) ◽  
pp. 165-180 ◽  
Author(s):  
Joanna K. Kuraszkiewicz ◽  
Paul J. Green ◽  
D. Michael Crenshaw ◽  
Jay Dunn ◽  
Karl Forster ◽  
...  
Keyword(s):  
Emission Line ◽  
Active Galactic Nuclei ◽  
Hubble Space Telescope ◽  
Galactic Nuclei ◽  
Space Telescope ◽  
Faint Object ◽  
Faint Object Spectrograph

scholarly journals THE 3D-HST SURVEY: HUBBLE SPACE TELESCOPE WFC3/G141 GRISM SPECTRA, REDSHIFTS, AND EMISSION LINE MEASUREMENTS FOR ∼100,000 GALAXIES

2016 ◽  
Vol 225 (2) ◽  
pp. 27 ◽  
Author(s):  
Ivelina G. Momcheva ◽  
Gabriel B. Brammer ◽  
Pieter G. van Dokkum ◽  
Rosalind E. Skelton ◽  
Katherine E. Whitaker ◽  
...  
Keyword(s):  
Emission Line ◽  
Hubble Space Telescope ◽  
Space Telescope

scholarly journals HUBBLE SPACE TELESCOPE STUDIES OF NEARBY TYPE Ia SUPERNOVAE: THE MEAN MAXIMUM LIGHT ULTRAVIOLET SPECTRUM AND ITS DISPERSION

2011 ◽  
Vol 727 (2) ◽  
pp. L35 ◽  
Author(s):  
Jeff Cooke ◽  
Richard S. Ellis ◽  
Mark Sullivan ◽  
Peter Nugent ◽  
D. Andrew Howell ◽  
...  
Keyword(s):  
Hubble Space Telescope ◽  
Ultraviolet Spectrum ◽  
Type Ia Supernovae ◽  
Space Telescope ◽  
Maximum Light ◽  
Type Ia ◽  
The Mean ◽  
Ia Supernovae

scholarly journals The dynamics of the broad-line region in NGC 3227

2020 ◽  
Vol 500 (1) ◽  
pp. 786-794
Author(s):  
Nick Devereux
Keyword(s):  
Emission Line ◽  
Hubble Space Telescope ◽  
Outer Radius ◽  
Short Time Scale ◽  
Broad Line ◽  
Fall Velocity ◽  
Space Telescope ◽  
X Ray ◽  
Broad Line Region ◽  
Line Region

ABSTRACT Archival Hubble Space Telescope (HST) observations of the Seyfert 1 nucleus of NGC 3227 obtained with the Space Telescope Imaging Spectrograph (STIS) are re-examined in order to constrain a viable photoionization model for the broad-line region (BLR). The results imply that the BLR is a partially ionized, dust-free, spherical shell that is collapsing, supersonically, at the free-fall velocity due to its proximity to a supermassive black hole. The BLR is ionization bounded at the outer radius, coincident with the dust reverberation radius, and transforms into an X-ray emitting plasma inside the Balmer reverberation radius as the central UV–X-ray source is approached. Only 40 M⊙ of Hydrogen are required to explain the Balmer emission-line luminosity, but it is compressed by gravity into a column measuring 5.5 × 1024 atoms cm−2. Assuming radiatively inefficient accretion, the X-ray luminosity requires ∼10−2 M⊙ yr−1. However, the mass inflow rate required to explain the luminosity of the broad H α emission line is ∼1 M⊙ yr−1. The very large disparity between these two estimates indicates that 99 per cent of the inflowing gas must be re-directed into an outflow, and on a very short time-scale corresponding to ∼40 yr. Alternatively, the radiative efficiency of the inflow has been overestimated, or the X-ray luminosity has been underestimated, a distinct possibility if the BLR is indeed Compton-thick.

scholarly journals Imaging and spectroscopy of Magellanic Cloud Planetary Nebulae obtained with the Hubble Space Telescope

1997 ◽  
Vol 180 ◽  
pp. 477-477
Author(s):  
E. Vassiliadis ◽  
M. Dopita ◽  
R. C. Bohlin ◽  
J. P. Harrington ◽  
S. J. Meatheringham ◽  
...  
Keyword(s):  
Emission Line ◽  
Hubble Space Telescope ◽  
Planetary Nebulae ◽  
Magellanic Cloud ◽  
Magellanic Clouds ◽  
Space Telescope ◽  
Imaging And Spectroscopy

The majority of planetary nebulae (PNe) at the distance of the Magellanic Clouds typically subtend 1 arcsec or less on the sky. The Planetary Camera onboard the Hubble Space Telescope has a scale of 0.044 arcsec per pixel and is therefore ideal to use to image these objects. At present, 16 LMC and 5 SMC objects have been imaged in the [O III] 5007 angstrom emission line, as part of this program. An additional 10 LMC and 5 SMC objects have been imaged in the same line under the Guaranteed Time Observer program.

Emission Line Properties of Active Galactic Nuclei from a Pre‐COSTAR Faint Object Spectrograph Hubble Space Telescope Spectral Atlas

2002 ◽  
Vol 143 (2) ◽  
pp. 257-276 ◽  
Author(s):  
Joanna K. Kuraszkiewicz ◽  
Paul J. Green ◽  
Karl Forster ◽  
Thomas L. Aldcroft ◽  
Ian N. Evans ◽  
...  
Keyword(s):  
Emission Line ◽  
Active Galactic Nuclei ◽  
Hubble Space Telescope ◽  
Galactic Nuclei ◽  
Space Telescope ◽  
Faint Object ◽  
Faint Object Spectrograph

scholarly journals [ITAL]Hubble Space Telescope[/ITAL] STIS Observations of the Kinematics of Emission-Line Nebulae in Three Compact Steep-Spectrum Radio Sources

2002 ◽  
Vol 123 (5) ◽  
pp. 2333-2351 ◽  
Author(s):  
Christopher P. O’Dea ◽  
Willem H. de Vries ◽  
Anton M. Koekemoer ◽  
Stefi A. Baum ◽  
Raffaella Morganti ◽  
...  
Keyword(s):  
Emission Line ◽  
Hubble Space Telescope ◽  
Radio Sources ◽  
Space Telescope ◽  
Spectrum Radio

scholarly journals TheChandra,Hubble Space Telescope, and VLA View of the Circumnuclear Extended Emission in the Narrow Emission Line Galaxy NGC 2110

2006 ◽  
Vol 653 (2) ◽  
pp. 1121-1128 ◽  
Author(s):  
Daniel A. Evans ◽  
Julia C. Lee ◽  
Maria Kamenetska ◽  
Sarah C. Gallagher ◽  
Ralph P. Kraft ◽  
...  
Keyword(s):  
Emission Line ◽  
Hubble Space Telescope ◽  
Space Telescope ◽  
Line Galaxy ◽  
Extended Emission ◽  
Narrow Emission
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