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New Eyes on the COld Sun: A Multimodal Study of Carbon Monoxide in the Solar Atmosphere
New Eyes on the COld Sun: A Multimodal Study of Carbon Monoxide in the Solar Atmosphere
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152127
- ISBN
- 9798384052487
- DDC
- 523
- 서명/저자
- New Eyes on the COld Sun: A Multimodal Study of Carbon Monoxide in the Solar Atmosphere
- 발행사항
- [Sl] : University of Colorado at Boulder, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 218 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
- 주기사항
- Advisor: Rast, Mark;Reardon, Kevin.
- 학위논문주기
- Thesis (Ph.D.)--University of Colorado at Boulder, 2024.
- 초록/해제
- 요약The spectroscopic detections of carbon monoxide (CO) above the solar limb suggests that cool gas permeates the solar atmosphere throughout the low chromosphere. However, no consensus exists regarding how significant amounts of CO-laden plasma persist in the predominantly hot and violent environment of the chromosphere. In this dissertation, I combine observation and simulation to study the life cycle this so-called "solar COmosphere". First, I describe my discovery of transient "cold bubbles" in the solar atmosphere, which are visible in CO's infrared absorption spectrum. These bubbles, which reach several thousand kilometers in size and could last as much as 40 minutes, show exponential growth and decay with timescales consistent chemical reaction rates in the low chromosphere - significantly higher than the typical formation height of the CO spectrum inferred from the same observations. To further understand these features I analyzed a Bifrost simulation of the solar atmosphere, where transient pockets of cool gas were found to form in the low chromosphere due to adiabatic expansion of the horizontal magnetic canopy field. These features produced measurable deepening the synthesized CO lines, with the strongest signatures originating from the rapid expansion of newly emerged flux into the chromosphere. However, weaker signatures associated with the transverse motions of photospheric bright points were much more common, and are therefore more likely to explain the observed CO limb extensions. This analysis was supplemented by CO5BOLD simulations incorporating realistic, time-dependent atmospheric chemistry, which confirmed that CO populations in these cold bubbles remain close to chemical equilibrium - a necessary condition if they are to contribute to the observed CO limb extensions. Lastly, I present some preliminary results from several unique observational efforts aimed at searching for cold bubbles in the infrared and millimeter solar spectrum. I conclude with a brief discussion of observing and simulation strategies for future investigations of solar CO.
- 일반주제명
- Astrophysics
- 일반주제명
- Atmospheric chemistry
- 일반주제명
- Astronomy
- 일반주제명
- Planetology
- 일반주제명
- Optics
- 키워드
- Observations
- 키워드
- Simulations
- 키워드
- Solar atmosphere
- 키워드
- Spectroscopy
- 키워드
- Carbon monoxide
- 기타저자
- University of Colorado at Boulder Astrophysical and Planetary Sciences
- 기본자료저록
- Dissertations Abstracts International. 86-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152127
■006m o d
■007cr#unu||||||||
■020 ▼a9798384052487
■035 ▼a(MiAaPQ)AAI31482804
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a523
■1001 ▼aStauffer, Johnathan R.▼0(orcid)0000-0002-6495-4685
■24510▼aNew Eyes on the COld Sun: A Multimodal Study of Carbon Monoxide in the Solar Atmosphere
■260 ▼a[Sl]▼bUniversity of Colorado at Boulder▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a218 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-03, Section: B.
■500 ▼aAdvisor: Rast, Mark;Reardon, Kevin.
■5021 ▼aThesis (Ph.D.)--University of Colorado at Boulder, 2024.
■520 ▼aThe spectroscopic detections of carbon monoxide (CO) above the solar limb suggests that cool gas permeates the solar atmosphere throughout the low chromosphere. However, no consensus exists regarding how significant amounts of CO-laden plasma persist in the predominantly hot and violent environment of the chromosphere. In this dissertation, I combine observation and simulation to study the life cycle this so-called "solar COmosphere". First, I describe my discovery of transient "cold bubbles" in the solar atmosphere, which are visible in CO's infrared absorption spectrum. These bubbles, which reach several thousand kilometers in size and could last as much as 40 minutes, show exponential growth and decay with timescales consistent chemical reaction rates in the low chromosphere - significantly higher than the typical formation height of the CO spectrum inferred from the same observations. To further understand these features I analyzed a Bifrost simulation of the solar atmosphere, where transient pockets of cool gas were found to form in the low chromosphere due to adiabatic expansion of the horizontal magnetic canopy field. These features produced measurable deepening the synthesized CO lines, with the strongest signatures originating from the rapid expansion of newly emerged flux into the chromosphere. However, weaker signatures associated with the transverse motions of photospheric bright points were much more common, and are therefore more likely to explain the observed CO limb extensions. This analysis was supplemented by CO5BOLD simulations incorporating realistic, time-dependent atmospheric chemistry, which confirmed that CO populations in these cold bubbles remain close to chemical equilibrium - a necessary condition if they are to contribute to the observed CO limb extensions. Lastly, I present some preliminary results from several unique observational efforts aimed at searching for cold bubbles in the infrared and millimeter solar spectrum. I conclude with a brief discussion of observing and simulation strategies for future investigations of solar CO.
■590 ▼aSchool code: 0051.
■650 4▼aAstrophysics
■650 4▼aAtmospheric chemistry
■650 4▼aAstronomy
■650 4▼aPlanetology
■650 4▼aOptics
■653 ▼aObservations
■653 ▼aSimulations
■653 ▼aSolar atmosphere
■653 ▼aSpectroscopy
■653 ▼aCarbon monoxide
■690 ▼a0596
■690 ▼a0752
■690 ▼a0606
■690 ▼a0590
■690 ▼a0371
■71020▼aUniversity of Colorado at Boulder▼bAstrophysical and Planetary Sciences.
■7730 ▼tDissertations Abstracts International▼g86-03B.
■790 ▼a0051
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163034▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


