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The properties and environments of superluminous supernovae- [electronic resource]
The properties and environments of superluminous supernovae - [electronic resource] / Lunn...
The properties and environments of superluminous supernovae- [electronic resource]

상세정보

자료유형  
 학위논문(국외)
자관 청구기호  
기본표목-개인명  
표제와 책임표시사항  
The properties and environments of superluminous supernovae - [electronic resource] / Lunnan, Ragnhild.
발행, 배포, 간사 사항  
[Sl] : Harvard University , 2015
    형태사항  
    1 online resource(249 p)
    일반주기  
    Source: Dissertation Abstracts International, Volume: 77-04(E), Section: B.
    일반주기  
    Advisers: Robert P. Kirshner; Edo Berger.
    학위논문주기  
    Thesis (Ph.D.)--Harvard University, 2015.
    이용제한주기  
    This item is not available from ProQuest Dissertations & Theses.
    요약 등 주기  
    요약Superluminous supernovae (SLSNe) are a rare class of stellar explosions discovered by wide-field optical transient surveys in the past decade. They are characterized by peak luminosities 10-100 times that of ordinary core-collapse and Type Ia SNe, and radiated energies of order 1051 erg, comparable to the entire kinetic energy of a canonical supernova explosion. Proposed sources of these tremendous energies include interaction between the supernova ejecta and dense circumstellar material (CSM), energy injection from the spin-down of a rapidly rotating and highly magnetized neutron star, or the pair-instability explosion of a very massive star producing several solar masses of radioactive nickel. In this thesis, I present results from the Pan-STARRS1 Medium Deep Survey (PS1/MDS), which discovered 15 hydrogen-poor SLSNe out to redshift 1.6 over the four years of its operation. I address the nature of SLSNe from two different angles. First, I characterize the SNe themselves, and compare their observed properties to model predictions. The PS1/MDS SLSN sample exhibits a diversity of light curve properties, and a wider range of peak luminosities than previously reported, particularly when accounting for the flux-limited nature of the survey. The light curves can generally be fit with magnetar spin-down models, though our sample also contains one very slowly evolving event that could plausibly be powered by radioactive decay. Second, I present the first comprehensive study of SLSN host galaxy environments and the sub-galactic environments, demonstrating that H-poor SLSNe preferentially occur in low-luminosity, low-mass, low-metallicity galaxies with high specific star formation rates. Their host galaxies are statistically distinct from the hosts of core-collapse SNe, but share many similarities with the galaxies that host long gamma-ray bursts (LGRBs). This suggests that the environmental factors leading to a massive star forming either a SLSN or a LGRB are similar, with a possible common ingredient being a preference for low-metallicity environments through the need of a progenitor with high core angular momentum. In terms of their local environments, resolved Hubble Space Telescope imaging reveals that SLSN locations are correlated with the UV light, though not as strongly as LGRBs are. Although a larger sample size is needed to distinguish them statistically, this trend is also consistent with the interpretation that SLSN progenitors are lower-mass than those of LGRBs, collapsing to form a rapidly spinning neutron star rather than a black hole launching a relativistic jet.
    주제명부출표목-일반주제명  
    부출표목-단체명  
    Harvard University Astronomy
      기본자료저록  
      Dissertation Abstracts International. 77-04B(E).
      기본자료저록  
      Dissertation Abstract International
      전자적 위치 및 접속  
       원문정보보기
      소장사항  
      20170404 2017

      MARC

       008170601s2015        us          esm        001c    eng
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      ■020    ▼a9781339295237
      ■035    ▼a(MiAaPQ)AAI3738985
      ■040    ▼aMiAaPQ▼cMiAaPQ
      ■090    ▼a전자도서(박사논문)
      ■1001  ▼aLunnan,  Ragnhild.
      ■24514▼aThe  properties  and  environments  of  superluminous  supernovae▼h[electronic  resource]▼cLunnan,  Ragnhild.
      ■260    ▼a[Sl]▼bHarvard  University▼c2015
      ■300    ▼a1  online  resource(249  p)
      ■500    ▼aSource:  Dissertation  Abstracts  International,  Volume:  77-04(E),  Section:  B.
      ■500    ▼aAdvisers:  Robert  P.  Kirshner;  Edo  Berger.
      ■5021  ▼aThesis  (Ph.D.)--Harvard  University,  2015.
      ■506    ▼aThis  item  is  not  available  from  ProQuest  Dissertations  &  Theses.
      ■520    ▼aSuperluminous  supernovae  (SLSNe)  are  a  rare  class  of  stellar  explosions  discovered  by  wide-field  optical  transient  surveys  in  the  past  decade.  They  are  characterized  by  peak  luminosities  10-100  times  that  of  ordinary  core-collapse  and  Type  Ia  SNe,  and  radiated  energies  of  order  1051  erg,  comparable  to  the  entire  kinetic  energy  of  a  canonical  supernova  explosion.  Proposed  sources  of  these  tremendous  energies  include  interaction  between  the  supernova  ejecta  and  dense  circumstellar  material  (CSM),  energy  injection  from  the  spin-down  of  a  rapidly  rotating  and  highly  magnetized  neutron  star,  or  the  pair-instability  explosion  of  a  very  massive  star  producing  several  solar  masses  of  radioactive  nickel.  In  this  thesis,  I  present  results  from  the  Pan-STARRS1  Medium  Deep  Survey  (PS1/MDS),  which  discovered  15  hydrogen-poor  SLSNe  out  to  redshift  1.6  over  the  four  years  of  its  operation.  I  address  the  nature  of  SLSNe  from  two  different  angles.  First,  I  characterize  the  SNe  themselves,  and  compare  their  observed  properties  to  model  predictions.  The  PS1/MDS  SLSN  sample  exhibits  a  diversity  of  light  curve  properties,  and  a  wider  range  of  peak  luminosities  than  previously  reported,  particularly  when  accounting  for  the  flux-limited  nature  of  the  survey.  The  light  curves  can  generally  be  fit  with  magnetar  spin-down  models,  though  our  sample  also  contains  one  very  slowly  evolving  event  that  could  plausibly  be  powered  by  radioactive  decay.  Second,  I  present  the  first  comprehensive  study  of  SLSN  host  galaxy  environments  and  the  sub-galactic  environments,  demonstrating  that  H-poor  SLSNe  preferentially  occur  in  low-luminosity,  low-mass,  low-metallicity  galaxies  with  high  specific  star  formation  rates.  Their  host  galaxies  are  statistically  distinct  from  the  hosts  of  core-collapse  SNe,  but  share  many  similarities  with  the  galaxies  that  host  long  gamma-ray  bursts  (LGRBs).  This  suggests  that  the  environmental  factors  leading  to  a  massive  star  forming  either  a  SLSN  or  a  LGRB  are  similar,  with  a  possible  common  ingredient  being  a  preference  for  low-metallicity  environments  through  the  need  of  a  progenitor  with  high  core  angular  momentum.  In  terms  of  their  local  environments,  resolved  Hubble  Space  Telescope  imaging  reveals  that  SLSN  locations  are  correlated  with  the  UV  light,  though  not  as  strongly  as  LGRBs  are.  Although  a  larger  sample  size  is  needed  to  distinguish  them  statistically,  this  trend  is  also  consistent  with  the  interpretation  that  SLSN  progenitors  are  lower-mass  than  those  of  LGRBs,  collapsing  to  form  a  rapidly  spinning  neutron  star  rather  than  a  black  hole  launching  a  relativistic  jet.
      ■590    ▼aSchool  code:  0084.
      ■650  4▼aAstronomy
      ■690    ▼a0606
      ■71020▼aHarvard  University▼bAstronomy.
      ■7730  ▼tDissertation  Abstracts  International▼g77-04B(E).
      ■773    ▼tDissertation  Abstract  International
      ■790    ▼a0084
      ■791    ▼aPh.D.
      ■792    ▼a2015
      ■793    ▼aEnglish
      ■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T14491655▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
      ■980    ▼a20170404▼f2017

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