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Supernova Environments Across the Spectrum
Supernova Environments Across the Spectrum
Supernova Environments Across the Spectrum

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211153105
ISBN  
9798384088578
DDC  
520
저자명  
Mayker Chen, Ness.
서명/저자  
Supernova Environments Across the Spectrum
발행사항  
[Sl] : The Ohio State University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
209 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-04, Section: B.
주기사항  
Advisor: Leroy, Adam.
학위논문주기  
Thesis (Ph.D.)--The Ohio State University, 2024.
초록/해제  
요약We present a statistical analysis of the local environments, ≈ 50−150 pc scale, of recent (≤ 125 years) supernovae (SNe) in nearby spiral galaxies. To do this, we identify 63 SNe observed during the years 1901-2023 that lie within the area covered by recent multi-wavelength high physical resolution surveys. We measure the molecular gas environment using ∼ 1'' or ≤ 150 pc resolution CO (2-1) maps obtained using the Atacama Large Millimeter/submillimeter Array. This is arguably the frst such study to approach the scales of individual massive molecular clouds (Mmol ∼ 105.3 M⊙). We detect CO (2-1) emission near ∼ 60% of the sample at 150 pc resolution, compared to ∼ 35% of map pixels with CO (2-1) emission, and up to ∼ 95% of the SNe at 1 kpc resolution compared to ∼ 80% of map pixels with CO (2-1) emission. We expect that many of the SNe coincident with CO (2-1) emission may eventually interact with nearby molecular clouds. This is consistent with the observation of widespread SN-molecular gas interaction in the Milky Way. The other ∼ 40% of SNe without strong CO (2-1) detections will deposit their energy in the difuse interstellar medium (ISM), perhaps helping drive large-scale turbulence or galactic outfows. Broken down by type, we detect CO (2-1) emission at the sites of ∼ 85% of our 9 stripped-envelope SNe (SESNe), ∼ 40% of our 34 Type II SNe, and ∼ 35% of our 13 Type Ia SNe. Consistent with their hypothesized origin from very short-lived massive stars, SESNe are most closely associated with the brightest CO (2-1) emitting regions in our sample. We also measure the Hα emission, a tracer of the presence of massive stars and ionized gas, at the sites of 33 of the sample SNe in 10 galaxies that have been covered by wide-area optical spectroscopic mapping using the MUSE instrument on the Very Large Telescope. We fnd that 41% (13/32) of these SNe occur coincident with a previously identifed H II region. For comparison, H II regions cover 32% of the area within ±1 kpc of any recent SN. Contrasting this local covering fraction with the fraction of SNe coincident with H II regions, we fnd a general excess of 6% ± 8.7% of all SNe to be associated with H II regions; this increases to an excess of 20% ± 10.4% of core-collapse SNe, and an excess of 38% ± 23.5% of stripped-envelope SNe. This is approximately consistent with only a modest fraction of stars exploding during the frst ∼ 5 Myr of a stellar population's life, when Hα emission is expected to be bright. Of the H II region SNe, 85% (11/13) also have detected molecular gas (CO (2-1) emission) in their sightlines. We also consider the extinction, nebular classifcation, and other properties of the ionized gas at the sites of SNe and fnd them to be largely consistent being drawn randomly from the galaxy ISM. Our results confrm that SN explosions are not restricted to only the densest gas, and instead exert feedback across a wide range of molecular gas densities. While extending such studies to the infrared using new infrared images from JWST, we serendipitously detected SN Ia 2021aefx in spiral galaxy NGC 1566. We present new 0.3 − 21 µm photometry at +357 days after B-band maximum, including the frst detection of any SN Ia at 15 µm. These observations follow earlier JWST observations of SN 2021aefx at +255 days after the time of maximum brightness. We measure the fraction of fux emerging at infrared wavelengths and its temporal evolution. We find that, the integrated 0.3 − 14 µm decay rate of ∆m0.3−14 = 1.35 ± 0.05 mag/100 days is higher than the decline rate from the radioactive decay of 56Co of ∼ 1.2 mag/100 days. The most plausible explanation for this discrepancy is that fux is shifting to 14 µm, and future JWST observations of SNe Ia will be able to directly test this hypothesis. However, models predicting non-radiative energy loss cannot be excluded with the present data. Finally, we present a collection of SN environment profles highlighting the diferent surveys used in this work.
일반주제명  
Astronomy
일반주제명  
Astrophysics
일반주제명  
Particle physics
키워드  
Supernova environments
키워드  
Supernovae
키워드  
Supernova feedback
키워드  
Interstellar medium
키워드  
Molecular gas
기타저자  
The Ohio State University Astronomy
기본자료저록  
Dissertations Abstracts International. 86-04B.
전자적 위치 및 접속  
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MARC

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■006m          o    d                
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■020    ▼a9798384088578
■035    ▼a(MiAaPQ)AAI31674007
■035    ▼a(MiAaPQ)OhioLINKosu1713268449026839
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a520
■1001  ▼aMayker  Chen,  Ness.
■24510▼aSupernova  Environments  Across  the  Spectrum
■260    ▼a[Sl]▼bThe  Ohio  State  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a209  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-04,  Section:  B.
■500    ▼aAdvisor:  Leroy,  Adam.
■5021  ▼aThesis  (Ph.D.)--The  Ohio  State  University,  2024.
■520    ▼aWe  present  a  statistical  analysis  of  the  local  environments,  ≈  50−150  pc  scale,  of  recent  (≤  125  years)  supernovae  (SNe)  in  nearby  spiral  galaxies.  To  do  this,  we  identify  63  SNe  observed  during  the  years  1901-2023  that  lie  within  the  area  covered  by  recent  multi-wavelength  high  physical  resolution  surveys.  We  measure  the  molecular  gas  environment  using  ∼  1''  or  ≤  150  pc  resolution  CO  (2-1)  maps  obtained  using  the  Atacama  Large  Millimeter/submillimeter  Array.  This  is  arguably  the  frst  such  study  to  approach  the  scales  of  individual  massive  molecular  clouds  (Mmol  ∼  105.3  M⊙).  We  detect  CO  (2-1)  emission  near  ∼  60%  of  the  sample  at  150  pc  resolution,  compared  to  ∼  35%  of  map  pixels  with  CO  (2-1)  emission,  and  up  to  ∼  95%  of  the  SNe  at  1  kpc  resolution  compared  to  ∼  80%  of  map  pixels  with  CO  (2-1)  emission.  We  expect  that  many  of  the  SNe  coincident  with  CO  (2-1)  emission  may  eventually  interact  with  nearby  molecular  clouds.  This  is  consistent  with  the  observation  of  widespread  SN-molecular  gas  interaction  in  the  Milky  Way.  The  other  ∼  40%  of  SNe  without  strong  CO  (2-1)  detections  will  deposit  their  energy  in  the  difuse  interstellar  medium  (ISM),  perhaps  helping  drive  large-scale  turbulence  or  galactic  outfows.  Broken  down  by  type,  we  detect  CO  (2-1)  emission  at  the  sites  of  ∼  85%  of  our  9  stripped-envelope  SNe  (SESNe),  ∼  40%  of  our  34  Type  II  SNe,  and  ∼  35%  of  our  13  Type  Ia  SNe.  Consistent  with  their  hypothesized  origin  from  very  short-lived  massive  stars,  SESNe  are  most  closely  associated  with  the  brightest  CO  (2-1)  emitting  regions  in  our  sample.  We  also  measure  the  Hα  emission,  a  tracer  of  the  presence  of  massive  stars  and  ionized  gas,  at  the  sites  of  33  of  the  sample  SNe  in  10  galaxies  that  have  been  covered  by  wide-area  optical  spectroscopic  mapping  using  the  MUSE  instrument  on  the  Very  Large  Telescope.  We  fnd  that  41%  (13/32)  of  these  SNe  occur  coincident  with  a  previously  identifed  H  II  region.  For  comparison,  H  II  regions  cover  32%  of  the  area  within  ±1  kpc  of  any  recent  SN.  Contrasting  this  local  covering  fraction  with  the  fraction  of  SNe  coincident  with  H  II  regions,  we  fnd  a  general  excess  of  6%  ±  8.7%  of  all  SNe  to  be  associated  with  H  II  regions;  this  increases  to  an  excess  of  20%  ±  10.4%  of  core-collapse  SNe,  and  an  excess  of  38%  ±  23.5%  of  stripped-envelope  SNe.  This  is  approximately  consistent  with  only  a  modest  fraction  of  stars  exploding  during  the  frst  ∼  5  Myr  of  a  stellar  population's  life,  when  Hα  emission  is  expected  to  be  bright.  Of  the  H  II  region  SNe,  85%  (11/13)  also  have  detected  molecular  gas  (CO  (2-1)  emission)  in  their  sightlines.  We  also  consider  the  extinction,  nebular  classifcation,  and  other  properties  of  the  ionized  gas  at  the  sites  of  SNe  and  fnd  them  to  be  largely  consistent  being  drawn  randomly  from  the  galaxy  ISM.  Our  results  confrm  that  SN  explosions  are  not  restricted  to  only  the  densest  gas,  and  instead  exert  feedback  across  a  wide  range  of  molecular  gas  densities.  While  extending  such  studies  to  the  infrared  using  new  infrared  images  from  JWST,  we  serendipitously  detected  SN  Ia  2021aefx  in  spiral  galaxy  NGC  1566.  We  present  new  0.3  −  21  µm  photometry  at  +357  days  after  B-band  maximum,  including  the  frst  detection  of  any  SN  Ia  at    15  µm.  These  observations  follow  earlier  JWST  observations  of  SN  2021aefx  at  +255  days  after  the  time  of  maximum  brightness.  We  measure  the  fraction  of  fux  emerging  at  infrared  wavelengths  and  its  temporal  evolution.  We  find  that,  the  integrated  0.3  −  14  µm  decay  rate  of  ∆m0.3−14  =  1.35  ±  0.05  mag/100  days  is  higher  than  the  decline  rate  from  the  radioactive  decay  of  56Co  of  ∼  1.2  mag/100  days.  The  most  plausible  explanation  for  this  discrepancy  is  that  fux  is  shifting  to    14  µm,  and  future  JWST  observations  of  SNe  Ia  will  be  able  to  directly  test  this  hypothesis.  However,  models  predicting  non-radiative  energy  loss  cannot  be  excluded  with  the  present  data.  Finally,  we  present  a  collection  of  SN  environment  profles  highlighting  the  diferent  surveys  used  in  this  work.
■590    ▼aSchool  code:  0168.
■650  4▼aAstronomy
■650  4▼aAstrophysics
■650  4▼aParticle  physics
■653    ▼aSupernova  environments
■653    ▼aSupernovae
■653    ▼aSupernova  feedback
■653    ▼aInterstellar  medium
■653    ▼aMolecular  gas
■690    ▼a0606
■690    ▼a0596
■690    ▼a0798
■71020▼aThe  Ohio  State  University▼bAstronomy.
■7730  ▼tDissertations  Abstracts  International▼g86-04B.
■790    ▼a0168
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164940▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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