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Träfflista för sökning "WFRF:(Ramesh V) "

Search: WFRF:(Ramesh V)

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  • Algaba, Juan-Carlos, et al. (author)
  • Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign
  • 2021
  • In: Astrophysical Journal Letters. - : American Astronomical Society. - 2041-8213 .- 2041-8205. ; 911:1
  • Research review (peer-reviewed)abstract
    • In 2017, the Event Horizon Telescope (EHT) Collaboration succeeded in capturing the first direct image of the center of the M87 galaxy. The asymmetric ring morphology and size are consistent with theoretical expectations for a weakly accreting supermassive black hole of mass ∼6.5 × 109 M o˙. The EHTC also partnered with several international facilities in space and on the ground, to arrange an extensive, quasi-simultaneous multi-wavelength campaign. This Letter presents the results and analysis of this campaign, as well as the multi-wavelength data as a legacy data repository. We captured M87 in a historically low state, and the core flux dominates over HST-1 at high energies, making it possible to combine core flux constraints with the more spatially precise very long baseline interferometry data. We present the most complete simultaneous multi-wavelength spectrum of the active nucleus to date, and discuss the complexity and caveats of combining data from different spatial scales into one broadband spectrum. We apply two heuristic, isotropic leptonic single-zone models to provide insight into the basic source properties, but conclude that a structured jet is necessary to explain M87's spectrum. We can exclude that the simultaneous γ-ray emission is produced via inverse Compton emission in the same region producing the EHT mm-band emission, and further conclude that the γ-rays can only be produced in the inner jets (inward of HST-1) if there are strongly particle-dominated regions. Direct synchrotron emission from accelerated protons and secondaries cannot yet be excluded.
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  • Hudson, Lawrence N, et al. (author)
  • The database of the PREDICTS (Projecting Responses of Ecological Diversity In Changing Terrestrial Systems) project
  • 2017
  • In: Ecology and Evolution. - : John Wiley & Sons. - 2045-7758. ; 7:1, s. 145-188
  • Journal article (peer-reviewed)abstract
    • The PREDICTS project-Projecting Responses of Ecological Diversity In Changing Terrestrial Systems (www.predicts.org.uk)-has collated from published studies a large, reasonably representative database of comparable samples of biodiversity from multiple sites that differ in the nature or intensity of human impacts relating to land use. We have used this evidence base to develop global and regional statistical models of how local biodiversity responds to these measures. We describe and make freely available this 2016 release of the database, containing more than 3.2 million records sampled at over 26,000 locations and representing over 47,000 species. We outline how the database can help in answering a range of questions in ecology and conservation biology. To our knowledge, this is the largest and most geographically and taxonomically representative database of spatial comparisons of biodiversity that has been collated to date; it will be useful to researchers and international efforts wishing to model and understand the global status of biodiversity.
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  • Result 1-10 of 75
Type of publication
journal article (56)
conference paper (11)
research review (5)
Type of content
peer-reviewed (69)
other academic/artistic (3)
Author/Editor
Rao, R (12)
Kim, Jae-Young (11)
Jonas, Jost B. (11)
Akiyama, Kazunori (11)
Alberdi, Antxon (11)
Alef, Walter (11)
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Baloković, Mislav (11)
Barrett, John (11)
Bintley, Dan (11)
Blackburn, Lindy (11)
Brissenden, Roger (11)
Britzen, Silke (11)
Broderick, Avery E. (11)
Bronzwaer, Thomas (11)
Byun, Do Young (11)
Chatterjee, Koushik (11)
Chen, Ming Tang (11)
Chen, Yongjun (11)
Cordes, James M. (11)
Cui, Yuzhu (11)
Davelaar, Jordy (11)
Dempsey, Jessica (11)
Desvignes, Gregory (11)
Eatough, Ralph P. (11)
Galison, Peter (11)
Gammie, Charles F. (11)
Garcia, Roberto (11)
Gentaz, Olivier (11)
Georgiev, Boris (11)
Gu, Minfeng (11)
Hecht, Michael H. (11)
Ho, Luis C. (11)
Inoue, Makoto (11)
James, David J. (11)
Jeter, Britton (11)
Johnson, Michael D. (11)
Jung, Taehyun (11)
Karami, Mansour (11)
Kawashima, Tomohisa (11)
Kim, Jongsoo (11)
Koay, Jun Yi (11)
Koyama, Shoko (11)
Lee, Sang Sung (11)
Li, Zhiyuan (11)
Janssen, Michael (11)
Liuzzo, Elisabetta (11)
Lo, Wen-Ping (11)
Mao, Jirong (11)
Mizuno, Yosuke (11)
Mizuno, Izumi (11)
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University
Karolinska Institutet (33)
Lund University (20)
Chalmers University of Technology (15)
University of Gothenburg (10)
Uppsala University (10)
Luleå University of Technology (9)
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Högskolan Dalarna (7)
Umeå University (5)
Mid Sweden University (5)
Stockholm University (4)
Linköping University (3)
Royal Institute of Technology (2)
Mälardalen University (2)
Linnaeus University (2)
Swedish University of Agricultural Sciences (2)
Kristianstad University College (1)
Södertörn University (1)
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Language
English (75)
Research subject (UKÄ/SCB)
Medical and Health Sciences (23)
Natural sciences (20)
Engineering and Technology (11)
Social Sciences (2)

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