메뉴 건너뛰기

제목 :  A New Paradigm for Star Formation: Episodic Accretion

연사 :  이정은 교수님 (경희대학교)

언어 :  Korean


요약

     Although a detailed understanding of the process of star formation is fundamental for studies of planet formation and galaxy formation/evolution, the actual accretion process to protostars is not yet well understood. The standard model for low mass star formation predicted a constant (~2 x 10-6 Msun yr-1) steady accretion process. However, this accretion rate gives rise to the classic "luminosity problem" whereby accretion at such a rate produces accretion luminosities higher than typically observed in embedded protostars, exceeding the predictions by a factor of 10 to 100.
Episodic accretion has been suggested as one possible solution to the luminosity problem. In the episodic accretion model, a protostar stays in the prolonged quiescent phase interrupted by short burst accretions. Therefore, protostars have low luminosities during most of the evolution. I will talk about theoretical predictions and observational evidences of the episodic accretion toward low mass protostars.

번호 제목 글쓴이 날짜 조회 수
공지 [09/8] Magnetizing the Universe during the Epoch of Reionization [17] webmaster 2017.09.03 206
51 [3/13] The effects of the cluster environment on dwarf galaxies - ram pressure and harassment webmaster 2015.03.07 6965
50 [4/3] GPS 교란상황에서의 항법기술 (Navigation in GPS-denied Environments) webmaster 2015.03.30 6495
49 [9/11] Compact binaries as gravitational-wave sources [61] webmaster 2015.09.10 6157
48 [5/1] 고해상도 SAR 위성 시스템 및 궤도상 성능 검증 결과 webmaster 2015.04.27 5835
47 [5/8] KMTNet 망원경을 이용한 초신성 연구 webmaster 2015.06.03 5676
46 [3/25] Galaxy Evolution in Dense Environments at z~2 [30] webmaster 2016.03.21 4804
45 [5/27] 인공위성 자세제어 테스트베드 글로벌 연구 동향 및 CMG 기반 스마트 자세제어 기술 webmaster 2016.05.26 4529
44 [3/24] National Space Situational Awareness Initiative webmaster 2017.03.20 4267
43 [3/20] Evolution of Late-Type Galaxies in Galaxy Clusters: Cold gas webmaster 2015.03.16 3342
42 [5/13] Mid-infrared excess emission of galaxies and implications for the star formation history webmaster 2016.05.10 3073
41 [5/22] 인공위성 관제시스템 개발 및 운용 webmaster 2015.06.03 2919
40 [6/5] Carbon-Enhanced Metal-Poor (CEMP) Stars in the Milky Way webmaster 2015.06.03 2865
39 [12/13] Galaxy Transformation in the local Universe webmaster 2016.12.05 2509
38 [4/10] Chemical Composition of Components of Eclipsing Binaries webmaster 2015.04.27 2445
37 [5/29] Mapping the Large-Scale Structure around Galaxy Clusters webmaster 2015.06.03 2422
36 [4/24] Frontiers of Semi-Analytic Models: from ICL modelling to the galaxy population in proto-clusters webmaster 2015.04.27 2367
35 [4/8] 영상센서를 이용한 저궤도 행성위성 궤도결정 기법 webmaster 2016.04.05 2354
34 [3/4] Active Electro-Optical Systems for Space Applications (SLR and Laser Altimeter) webmaster 2016.03.04 2325
33 [4/1] Growth of Seed Black Holes webmaster 2016.03.28 2266
» [3/17] A New Paradigm for Star Formation: Episodic Accretion webmaster 2017.03.15 2261