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Building a Comprehensive Picture of Stellar Death for the Era of Synoptic Surveys
Building a Comprehensive Picture of Stellar Death for the Era of Synoptic Surveys
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103637
- ISBN
- 9798314842843
- DDC
- 520
- 서명/저자
- Building a Comprehensive Picture of Stellar Death for the Era of Synoptic Surveys
- 발행사항
- [Sl] : University of Illinois at Urbana-Champaign, 2023
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2023
- 형태사항
- 289 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-11, Section: B.
- 주기사항
- Advisor: Fields, Brian D.
- 학위논문주기
- Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2023.
- 초록/해제
- 요약Nearly a century after their interpretation as the terminal stages of stellar evolution, countless questions still surround the physics powering supernovae. Without the ability to observe a star at the precise moment of its demise, our efforts to trace observed phenomenology back to nature of the terminal progenitor system are limited. This thesis attempts to clarify this connection through a detailed analysis of an explosion's local environment and signatures of interaction detected within the first few days of an explosion. We emphasize the value of these early-signatures through a comprehensive analysis of the nearby SN Ic 2020oi, and reveal its nature as the detonation of a low-mass (∼9.5 M⊙) binary progenitor enshrouded with ∼0.1 M⊙ of circumstellar material. To quantify the statistical leverage offered by a transient's host galaxy, we construct the Galaxies HOsting Supernovae and other Transients (GHOST) catalog of 16,175 supernovae and the photometric properties of their associated host galaxies from the first Data Release of the Pan-STARRS 3-π survey. We use a random forest classification model to distinguish between Type-Ia and Type-II SNe with ∼68% accuracy, and release a series of software tools that can be used to improve host-galaxy association at scale. Next, we forecast the host-galaxy correlations that will be revealed in deep upcoming surveys extending to z 3, and release the Simulated Catalog of Optical Transients and Correlated Hosts (SCOTCH) for benchmarking upcoming classification algorithms. We use this catalog to train a 'First Impressions' classifier, consisting of a recurrent neural network trained on synthetic samples and validated on supernovae from the Zwicky Transient Facility Bright Transient Sample (ZTF BTS).This classifier achieves a total accuracy of 83% within the first three days, a first in the literature; at thirty days, the precision and recall achieved are comparable to full-phase networks in the literature with more complex architectures. On the precipice of the Vera C. Rubin Observatory's unprecedented discovery rates, computational techniques able to leverage physical correlations will be essential for further clarifying progenitor physics and identifying objects of interest for targeted follow-up campaigns.
- 일반주제명
- Astronomy
- 일반주제명
- Computer science
- 일반주제명
- Astrophysics
- 키워드
- Supernovae
- 키워드
- Machine learning
- 키워드
- Neural networks
- 키워드
- Galaxy surveys
- 키워드
- Active learning
- 기타저자
- University of Illinois at Urbana-Champaign Astronomy
- 기본자료저록
- Dissertations Abstracts International. 86-11B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■035 ▼a(MiAaPQ)httphdlhandlenet2142120099
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a520
■1001 ▼aGagliano, Alexander Thomas.
■24510▼aBuilding a Comprehensive Picture of Stellar Death for the Era of Synoptic Surveys
■260 ▼a[Sl]▼bUniversity of Illinois at Urbana-Champaign▼c2023
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2023
■300 ▼a289 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-11, Section: B.
■500 ▼aAdvisor: Fields, Brian D.
■5021 ▼aThesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2023.
■520 ▼aNearly a century after their interpretation as the terminal stages of stellar evolution, countless questions still surround the physics powering supernovae. Without the ability to observe a star at the precise moment of its demise, our efforts to trace observed phenomenology back to nature of the terminal progenitor system are limited. This thesis attempts to clarify this connection through a detailed analysis of an explosion's local environment and signatures of interaction detected within the first few days of an explosion. We emphasize the value of these early-signatures through a comprehensive analysis of the nearby SN Ic 2020oi, and reveal its nature as the detonation of a low-mass (∼9.5 M⊙) binary progenitor enshrouded with ∼0.1 M⊙ of circumstellar material. To quantify the statistical leverage offered by a transient's host galaxy, we construct the Galaxies HOsting Supernovae and other Transients (GHOST) catalog of 16,175 supernovae and the photometric properties of their associated host galaxies from the first Data Release of the Pan-STARRS 3-π survey. We use a random forest classification model to distinguish between Type-Ia and Type-II SNe with ∼68% accuracy, and release a series of software tools that can be used to improve host-galaxy association at scale. Next, we forecast the host-galaxy correlations that will be revealed in deep upcoming surveys extending to z 3, and release the Simulated Catalog of Optical Transients and Correlated Hosts (SCOTCH) for benchmarking upcoming classification algorithms. We use this catalog to train a 'First Impressions' classifier, consisting of a recurrent neural network trained on synthetic samples and validated on supernovae from the Zwicky Transient Facility Bright Transient Sample (ZTF BTS).This classifier achieves a total accuracy of 83% within the first three days, a first in the literature; at thirty days, the precision and recall achieved are comparable to full-phase networks in the literature with more complex architectures. On the precipice of the Vera C. Rubin Observatory's unprecedented discovery rates, computational techniques able to leverage physical correlations will be essential for further clarifying progenitor physics and identifying objects of interest for targeted follow-up campaigns.
■590 ▼aSchool code: 0090.
■650 4▼aAstronomy
■650 4▼aComputer science
■650 4▼aAstrophysics
■653 ▼aSupernovae
■653 ▼aMachine learning
■653 ▼aNeural networks
■653 ▼aGalaxy surveys
■653 ▼aVera C. Rubin Observatory
■653 ▼aActive learning
■690 ▼a0606
■690 ▼a0984
■690 ▼a0596
■690 ▼a0800
■71020▼aUniversity of Illinois at Urbana-Champaign▼bAstronomy.
■7730 ▼tDissertations Abstracts International▼g86-11B.
■790 ▼a0090
■791 ▼aPh.D.
■792 ▼a2023
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358053▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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