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Supernova Environments Across the Spectrum
Supernova Environments Across the Spectrum
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211153105
- ISBN
- 9798384088578
- DDC
- 520
- 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
- Supernovae
- 키워드
- Molecular gas
- 기타저자
- The Ohio State University Astronomy
- 기본자료저록
- Dissertations Abstracts International. 86-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■020 ▼a9798384088578
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■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.


