Zobrazeno 1 - 10
of 56
pro vyhledávání: '"C A Negrete"'
Autor:
Logan B. Fries, Jonathan R. Trump, Keith Horne, Megan C. Davis, Catherine J. Grier, Yue Shen, Scott F. Anderson, Tom Dwelly, Y. Homayouni, Sean Morrison, Jessie C. Runnoe, Benny Trakhtenbrot, Roberto J. Assef, Dmitry Bizyaev, W. N. Brandt, Peter Breiding, Joel Brownstein, Priyanka Chakraborty, P. B. Hall, Anton M. Koekemoer, Héctor J. Ibarra-Medel, Mary Loli Martínez-Aldama, C. Alenka Negrete, Kaike Pan, Claudio Ricci, Donald P. Schneider, Hugh W. Sharp, Theodore B. Smith, Zachary Stone, Matthew J. Temple
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 2, p 239 (2024)
We present a velocity-resolved reverberation mapping analysis of the hypervariable quasar RM160 (SDSS J141041.25+531849.0) at z = 0.359 with 153 spectroscopic epochs of data representing a 10 yr baseline (2013–2023). We split the baseline into two
Externí odkaz:
https://doaj.org/article/96d2038e0f2c47619728e400204cf4e8
Autor:
Robert Wheatley, Catherine J. Grier, Patrick B. Hall, W. N. Brandt, Jonah Lotz, D. P. Schneider, Jonathan R. Trump, Yue Shen, Lucas M. Seaton, Scott F. Anderson, Matthew J. Temple, Roberto Assef, Logan B. Fries, Y. Homayouni, Darshan Kakkad, Anton M. Koekemoer, Mary Loli Martínez-Aldama, C. Alenka Negrete, Claudio Ricci, Dmitry Bizyaev, Joel R. Brownstein, Sean Morrison, Kaike Pan
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 49 (2024)
We present the results of an investigation of a highly variable C iv broad absorption line (BAL) feature in spectra of the quasar SBS 1408+544 ( z = 2.337) that shows a significant shift in velocity over time. This source was observed as a part of th
Externí odkaz:
https://doaj.org/article/995ddc85a3374435b04ec1772dce1fdf
Autor:
Andrés Almeida, Scott F. Anderson, Maria Argudo-Fernández, Carles Badenes, Kat Barger, Jorge K. Barrera-Ballesteros, Chad F. Bender, Erika Benitez, Felipe Besser, Jonathan C. Bird, Dmitry Bizyaev, Michael R. Blanton, John Bochanski, Jo Bovy, William Nielsen Brandt, Joel R. Brownstein, Johannes Buchner, Esra Bulbul, Joseph N. Burchett, Mariana Cano Díaz, Joleen K. Carlberg, Andrew R. Casey, Vedant Chandra, Brian Cherinka, Cristina Chiappini, Abigail A. Coker, Johan Comparat, Charlie Conroy, Gabriella Contardo, Arlin Cortes, Kevin Covey, Jeffrey D. Crane, Katia Cunha, Collin Dabbieri, James W. Davidson Jr, Megan C. Davis, Anna Barbara de Andrade Queiroz, Nathan De Lee, José Eduardo Méndez Delgado, Sebastian Demasi, Francesco Di Mille, John Donor, Peter Dow, Tom Dwelly, Mike Eracleous, Jamey Eriksen, Xiaohui Fan, Emily Farr, Sara Frederick, Logan Fries, Peter Frinchaboy, Boris T. Gänsicke, Junqiang Ge, Consuelo González Ávila, Katie Grabowski, Catherine Grier, Guillaume Guiglion, Pramod Gupta, Patrick Hall, Keith Hawkins, Christian R. Hayes, J. J. Hermes, Lorena Hernández-García, David W. Hogg, Jon A. Holtzman, Hector Javier Ibarra-Medel, Alexander Ji, Paula Jofre, Jennifer A. Johnson, Amy M. Jones, Karen Kinemuchi, Matthias Kluge, Anton Koekemoer, Juna A. Kollmeier, Marina Kounkel, Dhanesh Krishnarao, Mirko Krumpe, Ivan Lacerna, Paulo Jakson Assuncao Lago, Chervin Laporte, Chao Liu, Ang Liu, Xin Liu, Alexandre Roman Lopes, Matin Macktoobian, Steven R. Majewski, Viktor Malanushenko, Dan Maoz, Thomas Masseron, Karen L. Masters, Gal Matijevic, Aidan McBride, Ilija Medan, Andrea Merloni, Sean Morrison, Natalie Myers, Szabolcs Mészáros, C. Alenka Negrete, David L. Nidever, Christian Nitschelm, Daniel Oravetz, Audrey Oravetz, Kaike Pan, Yingjie Peng, Marc H. Pinsonneault, Rick Pogge, Dan Qiu, Solange V. Ramirez, Hans-Walter Rix, Daniela Fernández Rosso, Jessie Runnoe, Mara Salvato, Sebastian F. Sanchez, Felipe A. Santana, Andrew Saydjari, Conor Sayres, Kevin C. Schlaufman, Donald P. Schneider, Axel Schwope, Javier Serna, Yue Shen, Jennifer Sobeck, Ying-Yi Song, Diogo Souto, Taylor Spoo, Keivan G. Stassun, Matthias Steinmetz, Ilya Straumit, Guy Stringfellow, José Sánchez-Gallego, Manuchehr Taghizadeh-Popp, Jamie Tayar, Ani Thakar, Patricia B. Tissera, Andrew Tkachenko, Hector Hernandez Toledo, Benny Trakhtenbrot, José G. Fernández-Trincado, Nicholas Troup, Jonathan R. Trump, Sarah Tuttle, Natalie Ulloa, Jose Antonio Vazquez-Mata, Pablo Vera Alfaro, Sandro Villanova, Stefanie Wachter, Anne-Marie Weijmans, Adam Wheeler, John Wilson, Leigh Wojno, Julien Wolf, Xiang-Xiang Xue, Jason E. Ybarra, Eleonora Zari, Gail Zasowski
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 267, Iss 2, p 44 (2023)
The eighteenth data release (DR18) of the Sloan Digital Sky Survey (SDSS) is the first one for SDSS-V, the fifth generation of the survey. SDSS-V comprises three primary scientific programs or “Mappers”: the Milky Way Mapper (MWM), the Black Hole
Externí odkaz:
https://doaj.org/article/c316293bd0cb4069bc0c64377b2d0cef
Autor:
Joshua L. Steffen, Hai Fu, Joel R. Brownstein, J. M. Comerford, I. Cruz-González, Y. Sophia Dai, Niv Drory, Arran C. Gross, C. Alenka Negrete, Renbin Yan
Publikováno v:
The Astrophysical Journal, Vol 942, Iss 2, p 107 (2023)
We present a comparative study of active galactic nuclei (AGN) between galaxy pairs and isolated galaxies with the final data release of the MaNGA integral field spectroscopic survey. We build a sample of 391 kinematic galaxy pairs within the footpri
Externí odkaz:
https://doaj.org/article/b1f3e9015fa14d79b1d7522c9ff3133d
Autor:
Deborah Dultzin, Paola Marziani, J. A. de Diego, C. A. Negrete, Ascensión Del Olmo, Mary L. Martínez-Aldama, Mauro D'Onofrio, Edi Bon, Natasa Bon, Giovanna M. Stirpe
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 6 (2020)
Quasars accreting matter at very high rates (known as extreme Population A [xA] quasars, possibly associated with super-Eddington accreting massive black holes) may provide a new class of distance indicators covering cosmic epochs from present day up
Externí odkaz:
https://doaj.org/article/de94c6eb2ad342a6bd9f8e8e599a447e
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 514:3626-3649
We present a method to identify type-1 active galactic nuclei (AGN) in the central 3 arcsec integrated spectra of galaxies in the MaNGA DR15 sample. It is based on flux ratios estimates in spectral bands flanking the expected H$\alpha$ broad componen
Autor:
Paola Marziani, Deborah Dultzin, Jack W. Sulentic, Ascensión Del Olmo, C. A. Negrete, Mary L. Martínez-Aldama, Mauro D'Onofrio, Edi Bon, Natasa Bon, Giovanna M. Stirpe
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 5 (2018)
The last 25 years saw a major step forward in the analysis of optical and UV spectroscopic data of large quasar samples. Multivariate statistical approaches have led to the definition of systematic trends in observational properties that are the basi
Externí odkaz:
https://doaj.org/article/89b9ba0edb2d4ad39f473248493726b5
Autor:
Mary L. Martínez-Aldama, Ascensión Del Olmo, Paola Marziani, Jack W. Sulentic, C. Alenka Negrete, Deborah Dultzin, Jaime Perea, Mauro D'Onofrio
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 4 (2018)
We present preliminary results of a spectroscopic analysis for a sample of type 1 highly accreting quasars (L/LEdd ~ 1.0) at high redshift, z ~2–3. The quasars were observed with the OSIRIS spectrograph on the GTC 10.4 m telescope located at the Ob
Externí odkaz:
https://doaj.org/article/28886d5a940b431e8f912a2b8eb7c0a6
Autor:
Joshua L. Steffen, Hai Fu, Joel R. Brownstein, J. M. Comerford, I. Cruz-González, Y. Sophia Dai, Niv Drory, Arran C. Gross, C. Alenka Negrete, Renbin Yan
We present a comparative study of active galactic nuclei (AGN) between galaxy pairs and isolated galaxies with the final data release of the MaNGA integral field spectroscopic survey. We build a sample of 391 kinematic galaxy pairs within the footpri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7589f31dc8c35c615ea70dc20f7cf3da
http://arxiv.org/abs/2212.02677
http://arxiv.org/abs/2212.02677
Autor:
C. Alenka Negrete, Deborah Dultzin, Paola Marziani, Jack W. Sulentic, Donají Esparza-Arredondo, Mary L. Martínez-Aldama, Ascensión Del Olmo
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 4 (2017)
We propose the use of quasars with accretion rate near the Eddington ratio (extreme quasars) as standard candles. The selection criteria are based on the Eigenvector 1 (E1) formalism. Our first sample is a selection of 334 optical quasar spectra from
Externí odkaz:
https://doaj.org/article/93a512ba9b214c91aae85c412c4465b1