Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Karen M. Leighly"'
Autor:
Manuela Bischetti, Hyunseop Choi, Fabrizio Fiore, Chiara Feruglio, Stefano Carniani, Valentina D’Odorico, Eduardo Bañados, Huanqing Chen, Roberto Decarli, Simona Gallerani, Julie Hlavacek-Larrondo, Samuel Lai, Karen M. Leighly, Chiara Mazzucchelli, Laurence Perreault-Levasseur, Roberta Tripodi, Fabian Walter, Feige Wang, Jinyi Yang, Maria Vittoria Zanchettin, Yongda Zhu
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 9 (2024)
Although the mass growth of supermassive black holes during the epoch of reionization is expected to play a role in shaping the concurrent growth of their host galaxies, observational evidence of feedback at z ≳ 6 is still sparse. We perform the fi
Externí odkaz:
https://doaj.org/article/ba09e8dbe250469a871eb6016ab3502f
Autor:
Karen M. Leighly, Hyunseop Choi, Michael Eracleous, Donald M. Terndrup, Sarah C. Gallagher, Gordon T. Richards
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 87 (2024)
We present the optical–near-infrared spectral energy distributions (SED) and near-infrared variability properties of 30 low-redshift iron low-ionization Broad Absorption Line quasars (FeLoBALQs) and matched samples of LoBALQs and unabsorbed quasars
Externí odkaz:
https://doaj.org/article/d1abd6bc99214b4e9f1e6fe1be22bb28
Autor:
Kaylie S. Green, Sarah C. Gallagher, Karen M. Leighly, Hyunseop Choi, Dirk Grupe, Donald M. Terndrup, Gordon T. Richards, S. Komossa
Publikováno v:
The Astrophysical Journal, Vol 953, Iss 2, p 186 (2023)
Broad absorption line quasars are actively accreting supermassive black holes that have strong outflows characterized by broad absorption lines in their rest-UV spectra. Variability in these absorption lines occurs over months to years depending on t
Externí odkaz:
https://doaj.org/article/150f40af4e6a47bfa239796808d51e6c
Autor:
Hyunseop Choi, Karen M. Leighly, Donald M. Terndrup, Collin Dabbieri, Sarah C. Gallagher, Gordon T. Richards
Publikováno v:
Physics and Astronomy Publications
We present the first systematic study of 50 low-redshift (0.66 < z < 1.63) iron low-ionization broad absorption-line quasars (FeLoBALQs) using SimBAL, which represents a more than five-fold increase in the number of FeLoBALQs with detailed absorption
Autor:
Hyunseop Choi, Karen M. Leighly, Collin Dabbieri, Donald M. Terndrup, Sarah C. Gallagher, Gordon T. Richards
Publikováno v:
Physics and Astronomy Publications
We present continued analysis of a sample of low-redshift iron low-ionization broad absorption-line quasars (FeLoBALQs). Choi et al. (2022) presented $SimBAL$ spectral analysis of BAL outflows in 50 objects. Leighly et al. (2022) analyzed optical emi
Autor:
Karen M. Leighly, Hyunseop Choi, Cora DeFrancesco, Julianna Voelker, Donald M. Terndrup, Sarah C. Gallagher, Gordon T. Richards
Publikováno v:
Physics and Astronomy Publications
We report the results of analysis of the Hbeta emission-line region of a sample of thirty low-redshift (z
Resubmitted to ApJ after review
Resubmitted to ApJ after review
Publikováno v:
Physics and Astronomy Publications
Broad absorption line (BAL) features in quasar spectra reveal an unambiguous signature of energetic outflows from central supermassive black holes, and thus BAL quasars are prime targets for investigating the potential process of luminous quasar feed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::077272f2f8720458b339499138d15e26
https://ir.lib.uwo.ca/physicspub/133
https://ir.lib.uwo.ca/physicspub/133
Autor:
Sarah C. Gallagher, Hyunseop Choi, Donald M. Terndrup, Gordon T. Richards, Adrian B. Lucy, Karen M. Leighly, M. Dietrich, Catie Raney
Publikováno v:
Physics and Astronomy Publications
It has been known for 20 years that the absorbing gas in broad absorption line quasars does not completely cover the continuum emission region, and that partial covering must be accounted for to accurately measure the column density of the outflowing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0deb871962df02e9f9c9a3cb3a12baa2
https://ir.lib.uwo.ca/physicspub/135
https://ir.lib.uwo.ca/physicspub/135
Autor:
José L. Gómez, S. Komossa, Dirk Grupe, Michael Parker, M. Zetzl, Maria Santos-Lleo, Dan R. Wilkins, Luigi C. Gallo, N. Schartel, Gerard A. Kriss, Karen M. Leighly, Anna Lia Longinotti, Wolfram Kollatschny
Publikováno v:
Proceedings of the International Astronomical Union. 12:168-171
We present results from our ongoing monitoring programs aimed at identifying and understanding Active Galactic Nuclei (AGN) in extreme flux and spectral states. Observations of AGN in extreme states can reveal the nature of the inner accretion flow,
Publikováno v:
Physics and Astronomy Publications
Mrk 231 is a nearby quasar with an unusually red near-UV-to-optical continuum, generally explained as heavy reddening by dust (e.g., Leighly et al. 2014). Yan et al. 2015 proposed that Mrk~231 is a milli-parsec black-hole binary with little intrinsic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a64c1239d5f638d3691b0d0c1fa68afc