Zobrazeno 1 - 10
of 1 597
pro vyhledávání: '"Peter A Williams"'
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-10 (2024)
Abstract Biogeographic history can lead to variation in biodiversity across regions, but it remains unclear how the degree of biogeographic isolation among communities may lead to differences in biodiversity. Biogeographic analyses generally treat re
Externí odkaz:
https://doaj.org/article/b6485ebdfeb24e9380b92db2ba1cdb4a
Autor:
Jong-Hak Woo, Shu Wang, Suvendu Rakshit, Hojin Cho, Donghoon Son, Vardha N. Bennert, Elena Gallo, Edmund Hodges-Kluck, Tommaso Treu, Aaron J. Barth, Wanjin Cho, Adi Foord, Jaehyuk Geum, Hengxiao Guo, Yashashree Jadhav, Yiseul Jeon, Kyle M. Kabasares, Won-Suk Kang, Changseok Kim, Minjin Kim, Tae-Woo Kim, Huynh Anh N. Le, Matthew A. Malkan, Amit Kumar Mandal, Daeseong Park, Chance Spencer, Jaejin Shin, Hyun-il Sung, Vivian U, Peter R. Williams, Nick Yee
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 1, p 67 (2024)
We present the main results from a long-term reverberation mapping campaign carried out for the Seoul National University AGN Monitoring Project (SAMP). High-quality data were obtained during 2015–2021 for 32 luminous active galactic nuclei (AGNs;
Externí odkaz:
https://doaj.org/article/118912a1cbc54503bede1a5a195ee352
Autor:
Peter S. Williams
Publikováno v:
Linguaculture, Vol 13, Iss 1 (2022)
In his 1952 essay “On Three Ways of Writing for Children”, C. S. Lewis discusses three approaches to writing children’s literature and defends “that particular type of children’s story which is dearest to my own taste, the fantasy or fairy
Externí odkaz:
https://doaj.org/article/4f628dc117ad462794ac3a35a8b4cb4b
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)
Ecologists predict that loss of large vertebrates will alter tropical plant communities. Here, the authors report a field experiment on seed mortality and seedling establishment in Borneo, in which experimental defaunation of large seed consumers was
Externí odkaz:
https://doaj.org/article/76f5d2dd21f641ec801afb333626d89b
Autor:
Peter S. Williams
Publikováno v:
Theofilos, Vol 12, Iss 2-3, Pp 354-372 (2021)
John Warwick Montgomery (b. 1931) has been a major voice in Christian apologetics since the 1960’s. I have personally benefitted from reading several of Montgomery’s books over the years and have often quoted his work with approval in my own writ
Externí odkaz:
https://doaj.org/article/e5f2f4e9415f411d8d4e913c0afc6168
Autor:
Hojin Cho, Jong-Hak Woo, Shu Wang, Donghoon Son, Jaejin Shin, Suvendu Rakshit, Aaron J. Barth, Vardha N. Bennert, Elena Gallo, Edmund Hodges-Kluck, Tommaso Treu, Hyun-Jin Bae, Wanjin Cho, Adi Foord, Jaehyuk Geum, Yashashree Jadhav, Yiseul Jeon, Kyle M. Kabasares, Daeun Kang, Wonseok Kang, Changseok Kim, Donghwa Kim, Minjin Kim, Taewoo Kim, Huynh Anh N. Le, Matthew A. Malkan, Amit Kumar Mandal, Daeseong Park, Songyoun Park, Hyun-il Sung, Vivian U, Peter R. Williams
Publikováno v:
The Astrophysical Journal, Vol 953, Iss 2, p 142 (2023)
The broad-line region (BLR) size–luminosity relation has paramount importance for estimating the mass of black holes in active galactic nuclei (AGNs). Traditionally, the size of the H β BLR is often estimated from the optical continuum luminosity
Externí odkaz:
https://doaj.org/article/d5b61d4a8a724fddba8a0f1a97c1f8dc
Autor:
Lizvette Villafaña, Peter R. Williams, Tommaso Treu, Brendon J. Brewer, Aaron J. Barth, Vivian U, Vardha N. Bennert, Hengxiao Guo, Misty C. Bentz, Gabriela Canalizo, Alexei V. Filippenko, Elinor Gates, Michael D. Joner, Matthew A. Malkan, Jong-Hak Woo, Bela Abolfathi, Thomas Bohn, K. Azalee Bostroem, Andrew Brandel, Thomas G. Brink, Sanyum Channa, Maren Cosens, Edward Donohue, Goni Halevi, Carol E. Hood, J. Chuck Horst, Maxime de Kouchkovsky, Benjamin Kuhn, Douglas C. Leonard, Raúl Michel, Melanie Kae B. Olaes, Daeseong Park, Jordan N. Runco, Remington O. Sexton, Isaac Shivvers, Chance L. Spencer, Benjamin E. Stahl, Samantha Stegman, Jonelle L. Walsh, WeiKang Zheng
Publikováno v:
The Astrophysical Journal, Vol 948, Iss 2, p 95 (2023)
We combine our dynamical modeling black-hole mass measurements from the Lick AGN Monitoring Project 2016 sample with measured cross-correlation time lags and line widths to recover individual scale factors, f , used in traditional reverberation-mappi
Externí odkaz:
https://doaj.org/article/0a962c5761b7483ebb44cb11f96f24c4
Autor:
Y. Homayouni, Gisella De Rosa, Rachel Plesha, Gerard A. Kriss, Aaron J. Barth, Edward M. Cackett, Keith Horne, Erin A. Kara, Hermine Landt, Nahum Arav, Benjamin D. Boizelle, Misty C. Bentz, Thomas G. Brink, Michael S. Brotherton, Doron Chelouche, Elena Dalla Bontà, Maryam Dehghanian, Pu Du, Gary J. Ferland, Laura Ferrarese, Carina Fian, Alexei V. Filippenko, Travis Fischer, Ryan J. Foley, Jonathan Gelbord, Michael R. Goad, Diego H. González Buitrago, Varoujan Gorjian, Catherine J. Grier, Patrick B. Hall, Juan V. Hernández Santisteban, Chen Hu, Dragana Ilić, Michael D. Joner, Jelle Kaastra, Shai Kaspi, Christopher S. Kochanek, Kirk T. Korista, Andjelka B. Kovačević, Daniel Kynoch, Yan-Rong Li, Ian M. McHardy, Jacob N. McLane, Missagh Mehdipour, Jake A. Miller, Jake Mitchell, John Montano, Hagai Netzer, Christos Panagiotou, Ethan Partington, Richard W. Pogge, Luka Č. Popović, Daniel Proga, Daniele Rogantini, Thaisa Storchi-Bergmann, David Sanmartim, Matthew R. Siebert, Tommaso Treu, Marianne Vestergaard, Jian-Min Wang, Martin J. Ward, Tim Waters, Peter R. Williams, Fatima Zaidouni, Ying Zu
Publikováno v:
The Astrophysical Journal, Vol 948, Iss 2, p 85 (2023)
We present reverberation mapping measurements for the prominent ultraviolet broad emission lines of the active galactic nucleus Mrk 817 using 165 spectra obtained with the Cosmic Origins Spectrograph on the Hubble Space Telescope. Our ultraviolet obs
Externí odkaz:
https://doaj.org/article/8cc843479a1343fd9904787d8f7af75a
Autor:
Peter M. Williams
Publikováno v:
Applied Computing and Geosciences, Vol 10, Iss , Pp 100060- (2021)
Regional compilations of multi-element geochemistry can show shifts of level and dynamic range between component surveys, for example when analyses have been made using different laboratories or procedures or at different times. To create a unified c
Externí odkaz:
https://doaj.org/article/52b69b1c9e4b4f14b6a0602f39c4b333
Autor:
Mick N. Clout, Peter A. Williams
Invasive alien species are a major and growing threat to biodiversity worldwide. The transport of organisms through increased levels of trade and tourism is leading to the widespread breaching of natural biogeographic barriers at unprecedented rates.