Publications
Detailed Information
Optical Properties of Supernova Remnants in Nearby Galaxies : 가까운 은하에 있는 초신성 잔해의 광학적 특성
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 이명균 | - |
dc.contributor.author | 이종환 | - |
dc.date.accessioned | 2017-07-19T06:06:37Z | - |
dc.date.available | 2017-07-19T06:06:37Z | - |
dc.date.issued | 2014-08 | - |
dc.identifier.other | 000000021749 | - |
dc.identifier.uri | http://dcollection.snu.ac.kr:80/jsp/common/DcLoOrgPer.jsp?sItemId=000000021749 | - |
dc.description | 학위논문(박사)--서울대학교 대학원 :자연과학대학 물리·천문학부,2014. 8. 이명균. | - |
dc.description.abstract | Supernova remnants (SNRs) in extragalactic galaxies are useful targets to investigate the global properties of interstellar medium (ISM) of a galaxy, provide
information on the interplay between massive star formation and the local ISM, and understand the evolution of SNRs. I present a survey of optically selected SNRs in three nearby galaxies: M31, M33, and M83. They are close (<5 Mpc) and have well-formed spiral arms, indicating active star formation so that it is possible to fi nd many SNRs in these galaxies and characterize them in detail. I find the SNR candidates in M31 and M33 based on H a and [S II] images in the Local Group Survey, and I identify the M83 SNR candidates using archive HST images. Using these images, I select objects with enhanced [S II]:H a and circular shapes in each galaxy. I identify 156, 199, and 141 SNR candidates in M31, M33, and M83, respectively. Of the SNR candidates, 76 and 79, respectively, in M31 and M33 are newly found. I classify these SNR candidates in each galaxy according to two criteria: the SNR progenitor type and the morphological type. I find that fractions of the Type Ia SNR candidates in each galaxy are 23% (41 of 156), 15% (29 of 199), and 30% (43 of 141) for M31, M33, and M83, respectively. The majority (~90%) of the SNRs in each galaxy have shell structure. Most of the CC SNR candidates are concentrated in the spiral arms, while the Type Ia SNR candidates are rather distributed over the entire galaxy. The CC SNR candidates in M31 and M33 are brighter in H a and [S II] than the Type Ia SNR candidates. The H a luminosity of the SNR candidates in M31 ranges from L(H ) = 10^34.8 erg s^-1 to 10^37.2 erg s^-1, and their [S II] luminosity ranges from L([S II]) = 10^34.6 erg s^-1 to 10^37 erg s^-1. SNR candidates in M33 are detected to nearly the same limit. However, SNR candidates in M83 have much brighter optical luminosities than those in M31 and M33. This may be indicative of signi ficantly higher mean ISM densities in M83 compared with those in M31 and M33. Most of the SNR candidates in M31 and M33 have sizes of 20 pc < D < 60 pc, while most of the SNR candidates in M83 have smaller sizes than those in these two galaxies, 10 pc < D < 35 pc. The cumulative size distribution of the SNR candidates in M31 with 17 pc < D < 50 pc is well fi tted by a power law with an index of a= 2.53 +0.04, and a power law index for M33 in the same range of SNR size is a = 2.38+0.05. This indicates that most of both M31 and M33 SNR candidates are probably in the Sedov-Taylor phase. On the other hand, the cumulative size distribution of the M83 SNR candidates is well represented by a power law form in the range from D = 15 pc to 36 pc. The power law index for the distribution is a = 1.61+0.05. The [S II]:H a distribution of the SNR candidates in M31 is bimodal, with peaks at [S II]:Ha ~ 0.4 and ~0.9. Similarly, the [S II]:H a distribution of all the SNR candidates in M33 is bimodal, with peaks at [S II]:Ha ~ 0.6 and ~ 0.85. On the other hand, most of the SNR candidates in M83 have [S II]:H a of 0.3-0.6, and their distribution has a peak at [S II]:H a ~ 0.45. A higher fraction of SNR candidates with relatively high surface brightnesses, small sizes, and complete shapes in each galaxy are detected in X-rays. I fi nd a good correlation between the optical properties and X-ray luminosities for the SNR candidates with complete shells. I fi nd strong correlations between radio luminosities and optical properties for the M33 SNR candidates that are center-bright. In cases of the SNR candidates with complete shapes, objects with higher luminosity or surface brightness at optical wavelengths tend to have higher X-ray luminosity and radio luminosity. The SNR candidates with X-ray counterparts have higher surface brightness at optical wavelengths and smaller sizes than those without such counterparts. I fi nd good correlation between optical and near-IR luminosities of the SNR candidates with complete shells. | - |
dc.description.tableofcontents | ABSTRACT i
LIST OF FIGURES xii LIST OF TABLES xiv 1 INTRODUCTION 1 1.1 Supernova Remnants . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Types of Supernova Remnants . . . . . . . . . . . . . . . . . . . . . 2 1.3 Extragalactic Supernova Remnants . . . . . . . . . . . . . . . . . . . 3 1.4 Multi-wavelength Studies of Supernova Remnants . . . . . . . . . . . 3 1.5 Previous Surveys of Extragalactic Supernova Remnants . . . . . . . 5 1.6 Size Distribution of Supernova Remnants . . . . . . . . . . . . . . . 6 1.7 Targets in This Thesis . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1.8 Purpose of Thesis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2 A NEW OPTICAL SURVEY OF SUPERNOVA REMNANT CAN- DIDATES IN M31 11 2.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.2 DATA AND DATA REDUCTION . . . . . . . . . . . . . . . . . . . 14 2.2.1 Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.2.2 Selection, Size Measurements, and Photometry of M31 SNR Candidates . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.2.3 Classi fication of SNR Progenitors . . . . . . . . . . . . . . . . 24 2.2.4 Classifi cation of SNR Morphology . . . . . . . . . . . . . . . 24 2.3 RESULTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 2.3.1 A Catalog of M31 SNR Candidates . . . . . . . . . . . . . . . 28 2.3.2 Spatial Distributions of M31 SNR Candidates . . . . . . . . . 39 2.3.3 Ha and [SII] Luminosity Functions of M31 SNR Candidates . 42 2.3.4 Size Distributions of M31 SNR Candidates . . . . . . . . . . 44 2.3.5 [SII]:Ha Distributions of M31 SNR Candidates . . . . . . . . 46 2.3.6 Radial Variation in Physical Properties of M31 SNR Candidates 49 2.3.7 Luminosity-Size Relation and Surface Brightness-Size Relation for M31 SNR Candidates . . . . . . . . . . . . . . . . . . 53 2.4 DISCUSSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 2.4.1 Selection Effects, Biases, and Completeness . . . . . . . . . . 60 2.4.2 Comparison of the Physical Properties of SNR Candidates in M31 and Other Nearby Galaxies . . . . . . . . . . . . . . . . 61 2.4.3 Comparison of Cumulative Size Distributions of SNR Candidates in M31 and Other Nearby Galaxies . . . . . . . . . . . 64 2.4.4 Comparison with X-Ray Observations of M31 SNR Candidates 67 2.4.5 Spatial Distributions of Type Ia and CC SNR Candidates in M31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 2.5 SUMMARY AND CONCLUSION . . . . . . . . . . . . . . . . . . . 76 3 PROPERTIES OF OPTICALLY SELECTED SUPERNOVA REM- NANT CANDIDATES IN M33 81 3.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 3.2 DATA REDUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 3.2.1 Identifi cation of M33 SNR Candidates . . . . . . . . . . . . . 83 3.2.2 Classi fication of M33 SNR Candidates . . . . . . . . . . . . . 88 3.3 RESULTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 3.3.1 A List of M33 SNR Candidates . . . . . . . . . . . . . . . . . 91 3.3.2 Spatial Distributions of M33 SNR Candidates . . . . . . . . . 103 3.3.3 Size Distributions of M33 SNR Candidates . . . . . . . . . . 106 3.3.4 [SII]:Ha Distributions of M33 SNR Candidates . . . . . . . . 110 3.3.5 Luminosity-Size Relation and Surface Brightness-Size Relation of M33 SNR Candidates . . . . . . . . . . . . . . . . 110 3.4 DISCUSSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 3.4.1 Comparison with Previous Studies of SNR Candidates in M33 112 3.4.2 Comparison of SNR Candidates in M33 and M31 . . . . . . . 117 3.4.3 Comparison of Cumulative Size Distributions of SNR Candidates in Different Galaxies . . . . . . . . . . . . . . . . . . . . 119 3.4.4 Multiwavelength Properties of M33 SNR Candidates . . . . . 121 3.5 SUMMARY AND CONCLUSION . . . . . . . . . . . . . . . . . . . 128 4 MULTIWAVELENGTH STUDIES OF SUPERNOVA REMNANT CANDIDATES IN M83 131 4.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131 4.2 DATA and DATA REDUCTION . . . . . . . . . . . . . . . . . . . . 133 4.2.1 Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 4.2.2 Identi fication of M83 SNR Candidates . . . . . . . . . . . . . 133 4.2.3 Classi fication of M83 SNR Candidates . . . . . . . . . . . . . 138 4.3 RESULTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 4.3.1 A Catalog of M83 SNR Candidates . . . . . . . . . . . . . . . 142 4.3.2 Spatial Distributions of M83 SNR Candidates . . . . . . . . . 150 4.3.3 Size Distributions of M83 SNR Candidates . . . . . . . . . . 153 4.3.4 [SII]:H a Distributions of M83 SNR Candidates . . . . . . . . 156 4.4 DISCUSSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156 4.4.1 Comparison with Previous Studies of SNR Candidates in M83 156 4.4.2 Comparison of Physical Properties of SNR Candidates in M83 and other galaxies . . . . . . . . . . . . . . . . . . . . . . . . 160 4.4.3 Comparison of Cumulative Size Distributions of SNR candidates in Different Galaxies . . . . . . . . . . . . . . . . . . . . 161 4.4.4 Multi-wavelength Properties of the M83 SNR candidates . . . 166 5 SUMMARY 175 BIBLIOGRAPHY 181 A H images of the SNR candidates 189 초 록 215 | - |
dc.format.extent | xiv, 216 | - |
dc.language.iso | eng | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject | 초신성 잔해, 성간물질, 은하, M31, M33, M83 | - |
dc.subject.ddc | 523 | - |
dc.title | Optical Properties of Supernova Remnants in Nearby Galaxies | - |
dc.title.alternative | 가까운 은하에 있는 초신성 잔해의 광학적 특성 | - |
dc.type | Thesis | - |
dc.type | Dissertation | - |
dc.contributor.department | 자연과학대학 물리·천문학부 | - |
dc.description.degree | Doctor | - |
dc.date.awarded | 2014-08 | - |
dc.contributor.major | 천문학 전공 | - |
dc.identifier.holdings | 000000000017▲000000000021▲000000021749▲ | - |
- Appears in Collections:
- Files in This Item:
Item View & Download Count
Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.