Browsing by Author "0ce2133c-da30-4d05-8192-91d5c06199b8"

Now showing items 1-11 of 11

    • A kilonova as the electromagnetic counterpart to a gravitational wave source 
      Smartt, S. J.; Chen, T. W.; Jerkstrand, A.; Dessart, L.; Razza, A. (Nature Publishing Group, 2017)
      Gravitational waves were discovered with the detection of binary black-hole mergers(1) and they should also be detectable from lower-mass neutron-star mergers. These are predicted to eject material rich in heavy radioactive ...
    • Hydrogen rich supernovae beyond the neutrino driven core collapse paradigm 
      Terreran, G.; Pumo, M. L.; Chen, T. W.; Dessart, L. (Nature Publishing Group, 2017)
      Type II supernovae are the final stage of massive stars (above 8 M-circle dot) which retain part of their hydrogen-rich envelope at the moment of explosion. They typically eject up to 15 M-circle dot of material, with peak ...
    • LSQ13fn: A type II-Plateau supernova with a possibly low metallicity progenitor that breaks the standardised ... 
      Polshaw, J.; Kotak, R.; Dessart, L.; Fraser, M.; Gal Yam, Avishay; Inserra, C.; Sim, S. A.; Smartt, S. J.; Sollerman, J.; Baltay, C.; Rabinowitz, D.; Benetti, S.; Botticella, M. T.; Campbell, H.; Chen, T. W.; Galbany, Lluis; McKinnon, R.; Nicholl, M.; Smith, K. W.; Sullivan, M.; Takáts, K.; Valenti, S.; Young, D. R. (ESO, 2016)
      We present optical imaging and spectroscopy of supernova (SN) LSQ13fn, a type II supernova with several hitherto-unseen properties. Although it initially showed strong symmetric spectral emission features attributable to ...
    • Multi-messenger observations of a binary neutron star merger 
      Abbott, B. P.; Abbott, R.; Medina, G. E.; Dessart, L. (IOP Publishing Ltd., 2017)
      On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi ...
    • SN 2016gsd: an unusually luminous and linear type II supernova with high velocities 
      Reynolds, T. M.; Fraser, M.; Mattila, S.; Ergon, M.; Lundqvist, P.; Dessart, L.; Dong, Subo; Elias Rosa, N.; Galbany, L.; Gutiérrez, C. P.; Kangas, T.; Kankare, E.; Kotak, R.; Kuncarayakti, H.; Pastorello, A.; Rodríguez, O.; Smartt, S. J.; Stritzinger, M.; Tomasella, L.; Chen, Ping; Harmanen, J.; Hozzeinzadeh, G.; Howell, D. Andrew; Inserra, C.; Nicholl, M.; Nielsen, M.; Smith, K.; Somero, A.; Tronsgaard, R.; Young, D. R. (Oxford University Press, 2020)
      We present observations of the unusually luminous Type II supernova (SN) 2016gsd. With a peak absolute magnitude of V = -19.95 +/- 0.08, this object is one of the brightest Type II SNe, and lies in the gap of magnitudes ...
    • The lowest-metallicity type II supernova from the highest-mass red supergiant progenitor 
      Anderson, P.; Dessart, L.; Gutierrez, C.; Kruhler, T.; Galbany, Lluis; Jerkstrand, A.; Smartt, S.; Contreras, C.; Morrell, N.; Phillips, M.; Stritzinger, M.; Hsiao, E.; González Gaitán, Santiago; Agliozzo, C.; Castellon, Sergio; Chambers, K.; Chen, T.; Flewelling, H.; González, C.; Hosseinzadeh, G.; Huber, M.; Fraser, M.; Inserra, C.; Kankare, E.; Mattila, S.; Magnier, E.; Maguire, K.; Lowe, T.; Sollerman, J.; Sullivan, M.; Young, D.; Valenti, S. (Nature Publishing Group, 2018-07)
      Red supergiants have been confirmed as the progenitor stars of the majority of hydrogen-rich type II supernovae(1). However, while such stars are observed with masses > 25 M-circle dot (ref. (2)), detections of > 18 M-circle ...
    • Type II Plateau supernovae as metallicity probes of the Universe 
      Dessart, L.; Gutiérrez, Claudia P.; Hamuy Wackenhut, Mario; Hillier, D. J.; Lanz, T.; Anderson, J. P.; Folatelli, Gastón; Freedman, W. L.; Ley, F.; Morrell, N.; Persson, S. E.; Phillips, M. M.; Stritzinger, M.; Suntzeff, Nicholas B. (2014-05-11)
      We explore a method for metallicity determinations based on quantitative spectroscopy of Type II-Plateau supernovae (SNe II-P). For consistency, we first evolve a set of 15 M main-sequence stars at 0.1, 0.4, 1, and 2 ...
    • Type II supernova spectral diversity. I. Observations, sample characterization, and spectral line evolution 
      Gutiérrez, Claudia P.; Anderson, Joseph P.; Hamuy Wackenhut, Mario; Morrell, Nidia; González Gaitán, Santiago; Stritzinger, Maximilian D.; Phillips, Mark M.; Galbany, Lluis; Folatelli, Gastón; Dessart, L.; Contreras, Carlos; Della Valle, Massimo; Freedman, Wendy L.; Hsiao, Eric; Krisciunas, Kevin; Madore, Barry F.; Maza Sancho, José; Suntzeff, Nicholas B.; Prieto, José Luis; González, Luis; Cappellaro, Enrico; Navarrete, Mauricio; Pizzella, Alessandro; Ruiz González, María Teresa; Smith, R. Chris; Turatto, Massimo (IOP Publishing Ltd., 2017)
      We present 888 visual-wavelength spectra of 122 nearby type II supernovae (SNe II) obtained between 1986 and 2009, and ranging between 3 and 363 days post-explosion. In this first paper, we outline our observations and ...
    • Type II supernova spectral diversity. II. Spectroscopic and photometric correlations 
      Gutiérrez, Claudia P.; Anderson, Joseph P.; Hamuy Wackenhut, Mario; González Gaitán, Santiago; Galbany, Lluis; Dessart, Luc; Stritzinger, Maximilian D.; Phillips, Mark M.; Morrell, Nidia; Folatelli, Gastón (IOP Publishing Ltd., 2017)
      We present an analysis of observed trends and correlations between a large range of spectral and photometric parameters of more than 100 type II supernovae (SNe II), during the photospheric phase. We define a common epoch ...
    • Type II supernovae as probes of environment metallicity: observations of host He II regions 
      Anderson, J. P.; Gutiérrez, C. P.; Dessart, L.; Hamuy Wackenhut, Mario; Galbany, Lluis; Morrell, N. I.; Stritzinger, M. D.; Phillips, M. M.; Folatelli, Gastón; Boffin, H. M. J.; De Jaeger, Thomas; Kuncarayakti, Hanindyo; Prieto, J. L. (EDP Sciences, 2016)
      Context. Spectral modelling of type II supernova atmospheres indicates a clear dependence of metal line strengths on progenitor metallicity. This dependence motivates further work to evaluate the accuracy with which these ...
    • Type II supernovae as probes of environment metallicity: observations of host HII regions (Corrigendum) 
      Anderson, J. P.; Gutiérrez, C. P.; Dessart, L.; Hamuy Wackenhut, Mario; Galbany, Lluis; Morrell, N. I.; Stritzinger, M. D.; Phillips, M. M.; Folatelli, Gastón; Boffin, H. M. J.; De Jaeger, Thomas; Kuncarayakti, Hanindyo; Prieto, J. L. (EDP Sciences, 2016)