博碩士論文 109229002 完整後設資料紀錄

DC 欄位 語言
DC.contributor天文研究所zh_TW
DC.creator黃紹恩zh_TW
DC.creatorShao-En Huangen_US
dc.date.accessioned2022-7-25T07:39:07Z
dc.date.available2022-7-25T07:39:07Z
dc.date.issued2022
dc.identifier.urihttp://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=109229002
dc.contributor.department天文研究所zh_TW
DC.description國立中央大學zh_TW
DC.descriptionNational Central Universityen_US
dc.description.abstract距離約160秒差距的豺狼座分子雲是離太陽最近的恆星形成區之一。在九個已知的雲氣中,四個正在進行恆星形成,其中又以 三號分子雲為最活躍的恆星形成區域。我們利用近紅外2MASS和中遠紅外ALLWISE的顏色,以指認從深埋的原恆星到被行星盤環繞的典型金牛座T型星的年輕恆星。此區域的成員曾經過詳細研究,因此我們辨識出的兩顆第一類型年輕恆星(原恆星)以及42顆第二類型年輕恆星(典型金牛座T型)星,的確已經存在文獻中,但有一顆例外。這顆星(WISEA J160441.81−391315.4)具有明顯紅外超量,且為氫發射星,同時 Gaia EDR3的自行運動、視差皆與其他年輕成員一致,證明這顆星屬於年輕的成員。這顆星離13CO觀測描繪的分子雲(也就是年輕星團所在)大約 1 度,以運動來推測,大約在100萬到200萬年前從星團中以目前未知的機制逃逸出來。zh_TW
dc.description.abstractThe Lupus molecular cloud complex, at a distance of about 160 pc, is one of the nearest star-forming regions. Of the nine identified clouds, four are known to have ongoing star formation, with the Lupus 3 cloud being the most active. We present here identification of the young stellar objects from embedded proto-stars to planetary disk-bearing classical T Tauri stars in Lupus 3, selected by using near-infrared 2MASS, and mid- to far-infrared ALLWISE colors. The young stellar population in Lupus 3 has been well censored; of the two Class I (proto-stars) and 42 Class II objects (classical T Tauri stars) that we found, indeed all are known in the literature, except one, WISEA J160441.81−391315.4, not recognized previously. This object has distinct infrared excess, is an H-alpha emitter, and shares the same Gaia EDR3 proper motion and parallax as other young members, indicative of young membership. The star is located some 1 deg from the dense molecular core, traced by the 13CO observations, with which other young stellar objects are crowded. The kinematics suggest the star might have been a runaway member 1–2 Myr ago from the cluster, though at the moment no definite mechanism is inferred.en_US
DC.subject年輕恆星體zh_TW
DC.subject豺狼座三號星雲zh_TW
DC.subject逃逸成員zh_TW
DC.subjectYoung Stellar Objecten_US
DC.subjectLupus Molecular Cloud 3en_US
DC.subjectEscaping Memberen_US
DC.titleAn Escaping Young Star in the Lupus 3 Molecular Clouden_US
dc.language.isoen_USen_US
DC.type博碩士論文zh_TW
DC.typethesisen_US
DC.publisherNational Central Universityen_US

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