D
Daichi Hiramatsu
Researcher at University of California, Santa Barbara
Publications - 141
Citations - 2243
Daichi Hiramatsu is an academic researcher from University of California, Santa Barbara. The author has contributed to research in topics: Supernova & Light curve. The author has an hindex of 22, co-authored 93 publications receiving 1378 citations. Previous affiliations of Daichi Hiramatsu include Las Cumbres Observatory Global Telescope Network.
Papers
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Journal ArticleDOI
The rapid reddening and featureless optical spectra of the optical counterpart of GW170817, at 2017gfo, during the first four days
Curtis McCully,Curtis McCully,Daichi Hiramatsu,Daichi Hiramatsu,D. Andrew Howell,D. Andrew Howell,Griffin Hosseinzadeh,Griffin Hosseinzadeh,Iair Arcavi,Iair Arcavi,Daniel Kasen,Daniel Kasen,Jennifer Barnes,Michael M. Shara,Michael M. Shara,T. B. Williams,Petri Vaisanen,Stephen Potter,Encarni Romero-Colmenero,Steven M. Crawford,David A. H. Buckley,J. Cooke,J. Cooke,Igor Andreoni,Igor Andreoni,Igor Andreoni,Tyler Pritchard,Jirong Mao,Mariusz Gromadzki,Jamison Burke,Jamison Burke +30 more
TL;DR: The spectroscopic evolution of the first binary neutron star (BNS) merger detected by LIGO and Virgo, GW170817, was studied in this article.
Journal ArticleDOI
The Spectral Evolution of AT 2018dyb and the Presence of Metal Lines in Tidal Disruption Events
Giorgos Leloudas,Lixin Dai,Lixin Dai,Iair Arcavi,Iair Arcavi,P. M. Vreeswijk,Brenna Mockler,Brenna Mockler,Rupak Roy,D. Malesani,D. Malesani,Steve Schulze,Thomas Wevers,Morgan Fraser,Enrico Ramirez-Ruiz,Enrico Ramirez-Ruiz,Katie Auchettl,Jamison Burke,Jamison Burke,Giacomo Cannizzaro,Giacomo Cannizzaro,Panos Charalampopoulos,Panos Charalampopoulos,T. W. Chen,Aleksandar Cikota,Massimo Della Valle,Lluís Galbany,Mariusz Gromadzki,Kasper E. Heintz,Daichi Hiramatsu,Daichi Hiramatsu,Peter G. Jonker,Peter G. Jonker,Z. Kostrzewa-Rutkowska,Z. Kostrzewa-Rutkowska,Kate Maguire,Kate Maguire,Ilya Mandel,Ilya Mandel,Matt Nicholl,Matt Nicholl,Francesca Onori,Nathaniel Roth,Stephen Smartt,Lukasz Wyrzykowski,Dave R. Young +45 more
TL;DR: Leloudas et al. as discussed by the authors presented light curves and spectra of the tidal disruption event (TDE) ASASSN-18pg/AT 2018dyb spanning a period of one year.
Journal ArticleDOI
A new measurement of the Hubble constant using Type Ia supernovae calibrated with surface brightness fluctuations
Nandita Khetan,Luca Izzo,M. Branchesi,Radosław Wojtak,Michele Cantiello,C. Murugeshan,Adriano Agnello,Enrico Cappellaro,Massimo Della Valle,Christa Gall,Jens Hjorth,S. Benetti,Enzo Brocato,Jamison Burke,Jamison Burke,Daichi Hiramatsu,Daichi Hiramatsu,D. Andrew Howell,D. Andrew Howell,L. Tomasella,Stefano Valenti +20 more
TL;DR: In this paper, a new calibration of the peak absolute magnitude of Type Ia supernovae (SNe Ia) based on the surface brightness fluctuations (SBF) method, aimed at measuring the value of the Hubble constant is presented.
Journal ArticleDOI
The Rapid Reddening and Featureless Optical Spectra of the optical counterpart of GW170817, AT 2017gfo, During the First Four Days
Curtis McCully,Curtis McCully,Daichi Hiramatsu,Daichi Hiramatsu,D. Andrew Howell,D. Andrew Howell,Griffin Hosseinzadeh,Griffin Hosseinzadeh,Iair Arcavi,Iair Arcavi,Daniel Kasen,Daniel Kasen,Jennifer Barnes,Michael M. Shara,Michael M. Shara,T. B. Williams,Petri Vaisanen,Stephen Potter,Encarni Romero-Colmenero,Steven M. Crawford,David A. H. Buckley,J. Cooke,J. Cooke,Igor Andreoni,Igor Andreoni,Igor Andreoni,Tyler Pritchard,Jirong Mao,Mariusz Gromadzki,Jamison Burke,Jamison Burke +30 more
TL;DR: The spectroscopic evolution of the first binary neutron star (BNS) merger detected by LIGO and Virgo, GW170817, was studied in this paper, where the authors used best-fit models to infer that AT 2017gfo had an ejecta mass of $0.03M_\odot, high ejecta velocities of 0.3c, and a low mass fraction of high-opacity lanthanides and actinides.
Journal ArticleDOI
Photometric and Spectroscopic Properties of Type Ia Supernova 2018oh with Early Excess Emission from the Kepler 2 Observations
Wenxiong Li,Wenxiong Li,Xiaofeng Wang,Jozsef Vinko,Jozsef Vinko,Jun Mo,Griffin Hosseinzadeh,Griffin Hosseinzadeh,Griffin Hosseinzadeh,David J. Sand,Jujia Zhang,Han Lin,Tianmeng Zhang,Long Wang,Long Wang,Zhihao Chen,Danfeng Xiang,Liming Rui,Fang Huang,Fang Huang,Xue Li,Xiaojia Zhang,Linyi Li,E. Baron,James M. DerKacy,Xulin Zhao,Hanna Sai,Kaicheng Zhang,Kaicheng Zhang,Dale Andrew Howell,Dale Andrew Howell,Curtis McCully,Iair Arcavi,Iair Arcavi,Iair Arcavi,Stefano Valenti,Daichi Hiramatsu,Daichi Hiramatsu,J. Burke,J. Burke,A. Rest,A. Rest,Peter M. Garnavich,Brad E. Tucker,Gautham Narayan,Edward J. Shaya,S. Margheim,A. Zenteno,A. Villar,Georgios Dimitriadis,R. J. Foley,Yen-Chen Pan,David A. Coulter,Ori D. Fox,Saurabh Jha,D. O. Jones,Dan Kasen,Dan Kasen,Charles D. Kilpatrick,Anthony L. Piro,Adam G. Riess,Adam G. Riess,César Rojas-Bravo,Benjamin J. Shappee,Thomas W.-S. Holoien,Krzysztof Z. Stanek,Maria R. Drout,Katie Auchettl,Christopher S. Kochanek,J. S. Brown,Subhash Bose,D. Bersier,J. Brimacombe,Ping Chen,Subo Dong,S. Holmbo,J. A. Muñoz,Robert L. Mutel,R. S. Post,J. L. Prieto,J. V. Shields,D. Tallon,Todd A. Thompson,Patrick J. Vallely,Steven Villanueva,Stephen J. Smartt,K. W. Smith,K. C. Chambers,H. Flewelling,Mark E. Huber,E. A. Magnier,C. Z. Waters,A. S. B. Schultz,Joanna Bulger,T. B. Lowe,Mark Willman,Krisztián Sárneczky,András Pál,John C Wheeler,John C Wheeler,Attila Bódi,Zs. Bognár,B. Csák,B. Cseh,G. Csörnyei,O. Hanyecz,Bernadett Ignácz,Cs. Kalup,Réka Könyves-Tóth,Levente Kriskovics,A. Ordasi,I. Rajmon,Ádám Sódor,R. Szabó,Róbert Szakáts,G. Zsidi,Peter A. Milne,Jennifer E. Andrews,Nathan Smith,Christopher Bilinski,Peter J. Brown,Jakob Nordin,Steven Williams,Lluís Galbany,J. Palmerio,Isobel Hook,Cosimo Inserra,Kate Maguire,Régis Cartier,A. Razza,A. Razza,Claudia P. Gutiérrez,J. J. Hermes,Joshua S. Reding,B. C. Kaiser,John L. Tonry,A. N. Heinze,L. Denneau,H. Weiland,B. Stalder,Geert Barentsen,Jessie L. Dotson,Thomas Barclay,Thomas Barclay,Michael Gully-Santiago,Christina Hedges,Ann Marie Cody,Steve B. Howell,Jeffrey L. Coughlin,Jeffrey L. Coughlin,J. Van Cleve,J. Van Cleve,J. Vinicius de Miranda Cardoso,J. Vinicius de Miranda Cardoso,K. A. Larson,K. M. McCalmont-Everton,C. A. Peterson,S. E. Ross,L. H. Reedy,D. Osborne,C. McGinn,L. Kohnert,L. Migliorini,A. Wheaton,B. Spencer,C. Labonde,G. Castillo,G. Beerman,K. Steward,M. Hanley,R. M. Larsen,R. Gangopadhyay,R. Kloetzel,T. Weschler,V. Nystrom,J. Moffatt,M. Redick,Kim Griest,M. Packard,M. Muszynski,J. Kampmeier,R. Bjella,S. Flynn,B. Elsaesser +183 more
TL;DR: The first spectroscopically confirmed type Ia supernova (ASASSN-18bt) was observed in the Kepler field by Dimitriadis et al. as mentioned in this paper.