Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Laura E. Kay"'
Publikováno v:
The Astrophysical Journal. 668:L31-L34
We have discovered an extremely broad, double-peaked H-alpha emission line in the polarized flux spectrum of NGC 2110, establishing that this well-studied Seyfert 2 galaxy contains a disk-like hidden broad-line region (BLR). Several properties of NGC
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f344d5f11e39fb50b5ad5d7afa1a6fb5
https://doi.org/10.1086/522697
https://doi.org/10.1086/522697
Publikováno v:
The Astrophysical Journal. 567:790-800
We present the results of UV imaging polarimetry of the Seyfert 2 galaxy Mrk 477 taken by the Faint Object Camera onboard the Hubble Space Telescope (HST). From a previous HST UV image (lambda ~ 2180A), Mrk 477 has been known to have a pointlike brig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c9275af255c19577204ea49648fb889
https://doi.org/10.1086/338550
https://doi.org/10.1086/338550
Publikováno v:
The Astrophysical Journal. 565:155-162
We present UV imaging polarimetry data of the Seyfert 2 galaxy Mrk 3 taken by the Hubble Space Telescope. The polarized flux is found to be extended to ~1 kpc from the nucleus, and the position angles of polarization are centrosymmetric, confirming t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22b114bc09568b6d82423fe452006ae3
https://doi.org/10.1086/324333
https://doi.org/10.1086/324333
Publikováno v:
The Astrophysical Journal. 518:219-225
We observed the narrow-line Seyfert 1 galaxies IRAS 20181-2244 and IRAS 13324-3809 with a new spectropolarimeter on the RC spectrograph at the CTIO 4m telescope. Previously it had been suggested that IRAS 20181-2244 was a Type 2 QSO and thus might co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50c303bc2ad064dc6bb14f4ee331b2e3
https://doi.org/10.1086/307267
https://doi.org/10.1086/307267
Publikováno v:
The Astrophysical Journal. 489:L137-L140
We report the detection of ionized absorption in the ASCA spectrum of the narrow-line Seyfert 1 galaxy IRAS 17020+4544. Subsequent optical spectropolarimetry revealed high polarization increasing from 3% in the red to 5% in the blue, indicating elect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a726e0fd82bc8ed8d9411128682588b8
https://doi.org/10.1086/316793
https://doi.org/10.1086/316793
We have compared the X-ray--to--optical flux ratios (F_x/F_opt) of absorbed active galactic nuclei (AGNs) in the Chandra Deep Field North (CDF-N) with those of nearby, optically classified Seyfert 2 galaxies. The comparison provides an opportunity to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16b8bc7b6343f11d79893aa914558bf5
Autor:
Maria Ong, Kimberly S. Budil, Jami M. Valentine, Rachel Ivie, Melissa Eblen-Zayas, Ariel Michelman-Ribeiro, Karen E. Daniels, Richard Hazeltine, Elvira Williams, Yevgeniya V. Zastavker, Apriel K. Hodari, Barbara L. Whitten, K. Renee Horton, J. Rudati, Beverly Karplus Hartline, Luz J. Martinez-Miranda, Laura E. Kay, Theda Daniels-Race
Publikováno v:
AIP Conference Proceedings.
1 Lawrence Livermore National Laboratory; 2 Duke University; 3 Louisiana State University; 4 Carleton College; 5 Heritage University; 6 University of Texas, Austin; 7 The CNA Corporation; 8 University of Alabama; 9 American Institute of Physics; 10 B
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f33f0f070336be52547879a21b6bdd37
https://doi.org/10.1063/1.2128320
https://doi.org/10.1063/1.2128320
We present a composite 1-10 keV Seyfert 2 X-ray spectrum, derived from ASCA observations of a distance-limited sample of nearby galaxies. All 29 observed objects were detected. Above ~3 keV, the composite spectrum is inverted, confirming that Seyfert
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d07960d11e835a0721c39fb36ceed36d
http://arxiv.org/abs/astro-ph/0106519
http://arxiv.org/abs/astro-ph/0106519
We have discovered polarized broad emission lines in five type 2 Seyfert galaxies (NGC 424, NGC 591, NGC 2273, NGC 3081, and NGC 4507), establishing that these objects are type 1 Seyferts obscured by dense circumnuclear material. The galaxies are par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79f4715a2df1484778b9a5fc305dec0a
http://arxiv.org/abs/astro-ph/0007357
http://arxiv.org/abs/astro-ph/0007357
The X-ray spectra of two intermediate type Seyfert galaxies are investigated using ASCA observations separated by more than a year. Both NGC 4388 and ESO 103-G35 exhibit strong, narrow Fe K alpha line emission and absorption by cold neutral gas with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2429a1df80e4e35d68ea712a72a9d405