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  1. Article ; Online: A WC/WO star exploding within an expanding carbon-oxygen-neon nebula.

    Gal-Yam, A / Bruch, R / Schulze, S / Yang, Y / Perley, D A / Irani, I / Sollerman, J / Kool, E C / Soumagnac, M T / Yaron, O / Strotjohann, N L / Zimmerman, E / Barbarino, C / Kulkarni, S R / Kasliwal, M M / De, K / Yao, Y / Fremling, C / Yan, L /
    Ofek, E O / Fransson, C / Filippenko, A V / Zheng, W / Brink, T G / Copperwheat, C M / Foley, R J / Brown, J / Siebert, M / Leloudas, G / Cabrera-Lavers, A L / Garcia-Alvarez, D / Marante-Barreto, A / Frederick, S / Hung, T / Wheeler, J C / Vinkó, J / Thomas, B P / Graham, M J / Duev, D A / Drake, A J / Dekany, R / Bellm, E C / Rusholme, B / Shupe, D L / Andreoni, I / Sharma, Y / Riddle, R / van Roestel, J / Knezevic, N

    Nature

    2022  Volume 601, Issue 7892, Page(s) 201–204

    Abstract: The final fate of massive stars, and the nature of the compact remnants they leave behind (black holes and neutron stars), are open questions in astrophysics. Many massive stars are stripped of their outer hydrogen envelopes as they evolve. Such Wolf- ... ...

    Abstract The final fate of massive stars, and the nature of the compact remnants they leave behind (black holes and neutron stars), are open questions in astrophysics. Many massive stars are stripped of their outer hydrogen envelopes as they evolve. Such Wolf-Rayet stars
    Language English
    Publishing date 2022-01-12
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/s41586-021-04155-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Book ; Online: Liverpool Telescope 2

    Copperwheat, C. M. / Steele, I. A. / Barnsley, R. M. / Bates, S. D. / Bersier, D. / Bode, M. F. / Carter, D. / Clay, N. R. / Collins, C. A. / Darnley, M. J. / Davis, C. J. / Gutierrez, C. M. / Harman, D. J. / James, P. A. / Knapen, J. / Kobayashi, S. / Marchant, J. M. / Mazzali, P. A. / Mottram, C. J. /
    Mundell, C. G. / Newsam, A. / Oscoz, A. / Palle, E. / Piascik, A. / Rebolo, R. / Smith, R. J.

    a new robotic facility for rapid transient follow-up

    2014  

    Abstract: The Liverpool Telescope is one of the world's premier facilities for time domain astronomy. The time domain landscape is set to radically change in the coming decade, with surveys such as LSST providing huge numbers of transient detections on a nightly ... ...

    Abstract The Liverpool Telescope is one of the world's premier facilities for time domain astronomy. The time domain landscape is set to radically change in the coming decade, with surveys such as LSST providing huge numbers of transient detections on a nightly basis; transient detections across the electromagnetic spectrum from other facilities such as SVOM, SKA and CTA; and the era of `multi-messenger astronomy', wherein events are detected via non-electromagnetic means, such as gravitational wave emission. We describe here our plans for Liverpool Telescope 2: a new robotic telescope designed to capitalise on this new era of time domain astronomy. LT2 will be a 4-metre class facility co-located with the LT at the Observatorio del Roque de Los Muchachos on the Canary island of La Palma. The telescope will be designed for extremely rapid response: the aim is that the telescope will take data within 30 seconds of the receipt of a trigger from another facility. The motivation for this is twofold: firstly it will make it a world-leading facility for the study of fast fading transients and explosive phenomena discovered at early times. Secondly, it will enable large-scale programmes of low-to-intermediate resolution spectral classification of transients to be performed with great efficiency. In the target-rich environment of the LSST era, minimising acquisition overheads will be key to maximising the science gains from any follow-up programme. The telescope will have a diverse instrument suite which is simultaneously mounted for automatic changes, but it is envisaged that the primary instrument will be an intermediate resolution, optical/infrared spectrograph for scientific exploitation of transients discovered with the next generation of synoptic survey facilities. In this paper we outline the core science drivers for the telescope, and the requirements for the optical and mechanical design.

    Comment: 53 pages including 7 figures and 1 table. Accepted by Experimental Astronomy. First revision modified in light of comments ...
    Keywords Astrophysics - Instrumentation and Methods for Astrophysics ; Astrophysics - High Energy Astrophysical Phenomena
    Subject code 910
    Publishing date 2014-10-07
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Spectroscopic identification of r-process nucleosynthesis in a double neutron-star merger.

    Pian, E / D'Avanzo, P / Benetti, S / Branchesi, M / Brocato, E / Campana, S / Cappellaro, E / Covino, S / D'Elia, V / Fynbo, J P U / Getman, F / Ghirlanda, G / Ghisellini, G / Grado, A / Greco, G / Hjorth, J / Kouveliotou, C / Levan, A / Limatola, L /
    Malesani, D / Mazzali, P A / Melandri, A / Møller, P / Nicastro, L / Palazzi, E / Piranomonte, S / Rossi, A / Salafia, O S / Selsing, J / Stratta, G / Tanaka, M / Tanvir, N R / Tomasella, L / Watson, D / Yang, S / Amati, L / Antonelli, L A / Ascenzi, S / Bernardini, M G / Boër, M / Bufano, F / Bulgarelli, A / Capaccioli, M / Casella, P / Castro-Tirado, A J / Chassande-Mottin, E / Ciolfi, R / Copperwheat, C M / Dadina, M / De Cesare, G / Di Paola, A / Fan, Y Z / Gendre, B / Giuffrida, G / Giunta, A / Hunt, L K / Israel, G L / Jin, Z-P / Kasliwal, M M / Klose, S / Lisi, M / Longo, F / Maiorano, E / Mapelli, M / Masetti, N / Nava, L / Patricelli, B / Perley, D / Pescalli, A / Piran, T / Possenti, A / Pulone, L / Razzano, M / Salvaterra, R / Schipani, P / Spera, M / Stamerra, A / Stella, L / Tagliaferri, G / Testa, V / Troja, E / Turatto, M / Vergani, S D / Vergani, D

    Nature

    2017  Volume 551, Issue 7678, Page(s) 67–70

    Abstract: The merger of two neutron stars is predicted to give rise to three major detectable phenomena: a short burst of γ-rays, a gravitational-wave signal, and a transient optical-near-infrared source powered by the synthesis of large amounts of very heavy ... ...

    Abstract The merger of two neutron stars is predicted to give rise to three major detectable phenomena: a short burst of γ-rays, a gravitational-wave signal, and a transient optical-near-infrared source powered by the synthesis of large amounts of very heavy elements via rapid neutron capture (the r-process). Such transients, named 'macronovae' or 'kilonovae', are believed to be centres of production of rare elements such as gold and platinum. The most compelling evidence so far for a kilonova was a very faint near-infrared rebrightening in the afterglow of a short γ-ray burst at redshift z = 0.356, although findings indicating bluer events have been reported. Here we report the spectral identification and describe the physical properties of a bright kilonova associated with the gravitational-wave source GW170817 and γ-ray burst GRB 170817A associated with a galaxy at a distance of 40 megaparsecs from Earth. Using a series of spectra from ground-based observatories covering the wavelength range from the ultraviolet to the near-infrared, we find that the kilonova is characterized by rapidly expanding ejecta with spectral features similar to those predicted by current models. The ejecta is optically thick early on, with a velocity of about 0.2 times light speed, and reaches a radius of about 50 astronomical units in only 1.5 days. As the ejecta expands, broad absorption-like lines appear on the spectral continuum, indicating atomic species produced by nucleosynthesis that occurs in the post-merger fast-moving dynamical ejecta and in two slower (0.05 times light speed) wind regions. Comparison with spectral models suggests that the merger ejected 0.03 to 0.05 solar masses of material, including high-opacity lanthanides.
    Language English
    Publishing date 2017-11-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/nature24298
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 26: Show issues Location:
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    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)
    Zs.MG 9: Show issues
    Zs.MO 244: Show issues

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