Evidence that emission and absorption outflows in quasars are related

Autor: Xinfeng Xu, Chris Benn, Nadia L. Zakamska, Nahum Arav, Timothy R. Miller

Publikováno v: Monthly Notices of the Royal Astronomical Society. 495:305-320

We analyze VLT/X-shooter data for 7 quasars, where we study the relationships between their broad absorption line (BAL) and emission line outflows. We find: 1) the luminosity of the [OIII] $\lambda$5007 emission profile decreases with increasing elec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::019aa0ba737dc731b93d47eb8235a727
https://doi.org/10.1093/mnras/staa1142

Front Matter: Volume 11449

Autor: David S. Adler, Chris Benn, Robert L. Seaman

Publikováno v: Observatory Operations: Strategies, Processes, and Systems VIII.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b3032450405297e800f894ffe16593da
https://doi.org/10.1117/12.2591711

Distance, Energy, and Variability of Quasar Outflows: Two HST/COS epochs of LBQS 1206+1052

Autor: Xinfeng Xu, Timothy R. Miller, Rachel Plesha, Guilin Liu, Gerard A. Kriss, Nahum Arav, Chris Benn

We analyze new HST/COS spectra for two quasar absorption outflows seen in the quasi-stellar object LBQS 1206+1052. These data cover, for the first time, absorption troughs from $S_{IV}$, $Si_{II}$, and $P_V$. From the ratio of the $S_{IV}$* to $S_{IV

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f979dbdd3977ed936efe3f6b4166bb8b
http://arxiv.org/abs/1809.03114

Construction progress of WEAVE: the next generation wide-field spectroscopy facility for the William Herschel Telescope

Autor: Iain A. Steele, Frédéric Sayède, H. Hanenburg, D. Mayya, Don Carlos Abrams, José Guerra, Diego Cano, Rik ter Horst, Rafael Izazaga-Pérez, Szigfrid Farkas, Emilie Lhomé, David Terrett, Vanessa Hill, Kevin Dee, Daniel J. Smith, José Miguel Herreros, Christina Zurita, C. J. Mottram, Mat Pieri, Eddy Elswijk, Bernardo Salasnich, J. Alfonso L. Aguerri, Chris Benn, Nicholas A. Walton, S. Guest, J. Pragt, Esperanza Carrasco, C. Fariña, Jeurg Rey, Carlos Allende, Ian Lewis, Remko Stuik, Janet E. Drew, Gavin Dalton, Antonella Vallenari, Georgia Bishop, Andy Ridings, Lilian Dominquez Palmero, Scott Trager, S. D. Bates, Marcello Lodi, Ellen Schallig, Eduardo Gonzales Solares, Bianca M. Poggianti, Neil O'Mahony, Clare Worley, S. Mignot, Jose Miguel Delgado, Andrea Melissa Hidalgo, Mike Irwin, N. Tromp, José Alonso Burgal, Kevin Middleton, James R. Lewis, Luis Peralta de Arriba, Ian Tosh, Carlos Martin, Emilio Molinari, James Gilbert, Jan Kragt, Marc Verheijen, Adrian Martin, Piercarlo Bonifacio, Menno de Haan, David Murphy, Sergio Picó, Ramón Navarro, Gabby Kroes, Andrea Baruffolo, Matthew Brock, Frank Gribbin, Dirk Lesman, Shoko Jin, Andrea Bianco

Publikováno v: Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII; 107021B, 10702
Ground-based and Airborne Instrumentation for Astronomy VII
Proceedings of the SPIE
Proceedings of the SPIE, 0000, à renseigner, Unknown Region. ⟨10.1117/12.2312031⟩

International audience; We present an update on the overall construction progress of the WEAVE next-generation spectroscopy facility for the William Herschel Telescope (WHT), now that all the major fabrication contracts are in place. We also present

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b7e1495d15f4116a75b4ceb87379302
https://doi.org/10.1117/12.2312031

Evidence that 50% of BALQSO Outflows Are Situated at Least 100 pc from the Central Source

Autor: Nahum Arav, Carter Chamberlain, Chris Benn, Guilin Liu, Xinfeng Xu, James Stidham

The most robust way for determining the distance of quasar absorption outflows is the use of troughs from ionic excited states. The column density ratio between the excited and resonance states yields the outflow number density. Combined with a knowl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c8e238de8d9df80e76ef744f2d8d936d