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

scholarly journals Excitation Mechanism of Extended Emission-Line Regions in Active Galaxies

1997 ◽  
Vol 159 ◽  
pp. 386-389
Author(s):  
Ian Evans ◽  
Anuradha Koratkar ◽  
Mark Allen ◽  
Zlatan Tsvetanov ◽  
Michael Dopita
Keyword(s):  
Emission Line ◽  
Hubble Space Telescope ◽  
Optical Emission ◽  
Active Galaxies ◽  
Emission Lines ◽  
Uv Spectrophotometry ◽  
Excitation Mechanism ◽  
Space Telescope ◽  
Shock Models ◽  
Extended Emission

AbstractPhotoionization and shock models of the extended emissionline regions (EELRs) in active galaxies demonstrate that the optical emission lines alone are a poor discriminant of the excitation mechanism. Combining optical and UV data provides a discriminant between nuclear photoionization and autoionizing shock models. Hubble Space Telescope UV spectrophotometry of two Seyferts suggests that the EELRs in these objects are probably photoionized by the nucleus.

scholarly journals Spectroscopically Identified Emission Line Galaxy Pairs in the WISP Survey*

2021 ◽  
Vol 923 (2) ◽  
pp. 156
Author(s):  
Y. Sophia Dai ◽  
Matthew M. Malkan ◽  
Harry I. Teplitz ◽  
Claudia Scarlata ◽  
Anahita Alavi ◽  
...  
Keyword(s):  
Emission Line ◽  
Near Infrared ◽  
Hubble Space Telescope ◽  
Galactic Nuclei ◽  
Wide Field ◽  
Isolated Galaxies ◽  
Parallel Mode ◽  
Power Law Index ◽  
Attenuation Corrected ◽  
Line Galaxy

Abstract We identify a sample of spectroscopically measured emission line galaxy (ELG) Pairs up to z = 1.6 from the Wide Field Camera 3 (WFC3) Infrared Spectroscopic Parallels (WISP) survey. WISP obtained slitless, near-infrared grism spectroscopy along with direct imaging in the J and H bands by observing in the pure-parallel mode with the WFC3 on board the Hubble Space Telescope. From our search of 419 WISP fields covering an area of ∼0.5 deg2, we find 413 ELG pair systems, mostly H α emitters. We then derive reliable star formation rates (SFRs) based on the attenuation-corrected H α fluxes. Compared to isolated galaxies, we find an average SFR enhancement of 40%–65%, which is stronger for major Pairs and Pairs with smaller velocity separations (Δ v < 300 km s−1). Based on the stacked spectra from various subsamples, we study the trends of emission line ratios in pairs, and find a general consistency with enhanced lower ionization lines. We study the pair fraction among ELGs, and find a marginally significant increase with redshift f ∝ (1 + z) α , where the power-law index α = 0.58 ± 0.17 from z ∼ 0.2 to ∼1.6. The fraction of active galactic nuclei is found to be the same in the ELG Pairs as compared to the isolated ELGs.

Observation of soft X-ray spectra from a Seyfert 1 and a narrow emission-line galaxy

1985 ◽  
Vol 297 ◽  
pp. 633 ◽  
Author(s):  
K. P. Singh ◽  
G. P. Garmire ◽  
J. Nousek
Keyword(s):  
Emission Line ◽  
X Ray ◽  
Line Galaxy ◽  
Narrow Emission

Observations of Soft X-Ray Spectra from a Seyfert 1 and a Narrow Emission-Line Galaxy: Erratum

1987 ◽  
Vol 312 ◽  
pp. 484 ◽  
Author(s):  
K. P. Singh ◽  
G. P. Garmire ◽  
J. Nousek
Keyword(s):  
Emission Line ◽  
X Ray ◽  
Line Galaxy ◽  
Narrow Emission

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

scholarly journals Probing Unification withChandraHETGS andXMM‐NewtonEPIC and RGS Spectroscopy of the Narrow Emission Line Galaxy NGC 2110

2007 ◽  
Vol 671 (2) ◽  
pp. 1345-1354 ◽  
Author(s):  
Daniel A. Evans ◽  
Julia C. Lee ◽  
T. Jane Turner ◽  
Kimberly A. Weaver ◽  
Herman L. Marshall
Keyword(s):  
Emission Line ◽  
Line Galaxy ◽  
Narrow Emission

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 AX J1749+684: a narrow-emission-line galaxy with a flat X-ray spectrum

1997 ◽  
Vol 291 (1) ◽  
pp. L17-L22 ◽  
Author(s):  
K. Iwasawa ◽  
A. C. Fabian ◽  
W. N. Brandt ◽  
C. S. Crawford ◽  
O. Almaini
Keyword(s):  
Emission Line ◽  
X Ray ◽  
Line Galaxy ◽  
Narrow Emission
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