µo«H¤H: plutostar.bbs@bbs.mcu.edu.tw (ÂÈ¦ç¯ó)
¤é´Á: 30 Mar 2005 14:04:44 GMT
¼ÐÃD: [ºK¿ý]¦~»´¦Ó©_¯Sªº«í¬P°Êª«¶é¡X»Èªe¤¤ªº¶W¯Å¬P¹Î
«H¸s: tw.bbs.sci.astronomy    ¬ÝªO: Astronomy/A114LCFS
¨Ó·½: <4HOXli$VaF@bbs.mcu.edu.tw>:24435, 
²ÕÂ´: »Ê¶Ç¿v¹Ú§O¹Ò

­^°ê­Û´°¤j¾Ç¡]University College London¡^¤Ñ¤å¾Ç®aSimon Clark¤Î¼Ú¬w¤@¨Ç
¤Ñ¤å¾Ç®a¡A§Q¥Î¼Ú«n¤Ñ¤å¥x¡]ESO¡^¦ì¦b´¼§QLa SillaÆ[´ú¯¸ªº2.2¦Ì±æ»·Ãè¡A©ó
§Ú­Ì»Èªe¨t¤¤µo²{¤F¤@­Ó¡u¶W¯Å¬P¹Î¡]Super star clusters¡^¡v¡X¼Æ¤Q¸UÁû«í¬P
À½¦b¤@­Ó«Ü¤pªº½d³ò¤º¡A§e²{¥X¦t©z¤¤«í¬P©M¦æ¬P³Ì·¥ºÝªº§Î¦¨Àô¹Ò¡C

¦Ü¤µ¬°¤î¡A¤Ñ¤å¾Ç®a¤wª¾ªº¶W¯Å¬P¹Î³£¦ì¦b»»»·ªº¦a¤è¡A¦Ó¥B³£¬O¦b¤@¸s©Î¤@¹ï
¦³¥æ¤¬§@¥Îªº¬¡ÅD¬P¨t¤¤µo²{¡A¨C­Ó¶W¯Å¬P¹Î¤¤ªº¦¨­û¬P¥i¶W¹L¼Æ¦Ê¸UÁû¡A¹³¬O
¬P¨tªºÁY¤pª©¡C¦ÓClarkµ¥¤Hµo²{ªº¶W¯Å¬P¹Î¡A½s¸¹¬°¡uWesterlund 1¡v¡A´N¦ì¦b
§Ú­Ì»Èªe¨t¤¤¡A¤ñ¥ô¦ó¤wª¾ªº¨ä¥L¶W¯Å¬P¹ÎÁÙªñ1000­¿¥H¤W¡A¦]¦¹¤Ñ¤å¾Ç®a¥i¥H
¥J²ÓÀËµø³o­Ó¶W¯Å¬P¹Îªº²Ó³¡µ²ºc¡C

¤Ñ¤å¾Ç®a»{¬°¡A­è½Ï¥Íªº¦~»´¬P¹Î¤@¯ë³£¬O¡u²¨´²¬P¹Î¡]open cluster¡^¡v¡A¦¨­û
¬P¤§¶¡©¼¦¹¤ñ¸û²¨»·¡F¨Ò¦p§Ú­Ì¤Ó¶§¡A´N¬O¦b¬Y­Ó²¨´²¬P¹Î¤¤½Ï¥Íªº¡C¥L­Ì²q´ú¦b
»Èªe¨t¦­´Á¡]¬ù120»õ¦~«e¡^¡A¤@©w¨ì³B¥Rº¡¶W¯Å¬P¹Î¡F¦Ó²{¦b©Ò¨£´X¥G©M»Èªe¨t¤@
¼Ë¦Ñªº²yª¬¬P¹Î¡]globular clusters¡^¡A¥i¯à´N¬O¨º¨Ç¶W¯Å¬P¹Îªº¡u´Ý¾l¥÷¤l¡v¡C

Westerlund 1¬P¹Î¦ì¦b«n¤Ñªº¤Ñ¾Â®y¡]Ara¡^¤¤¡AÂ÷¦a²y¬ù10000¥ú¦~¡A1961¦~¥Ñ·ç
¨å¤Ñ¤å¾Ç®aBengt Westerlund©ó¿D¬w¶i¦æÆ[´ú®Éµo²{ªº¡A¹ê½è¤WÄÝ©ó¬P¹Î¤ÀÃþ¤¤ªº
¡u²¨´²¬P¹Î¡v¡CWesterlund«á¨Ó©ó1970¡ã1974¦~¶¡¦¨¬°ESOªº¥xªø¡CµM¦Ó¡A¦]¬P¹Î«e
¤è³Q¤j¶qªº®ðÅé»P¹Ð®Jªý¾×¡A±q¦a²y¤W¬Ý¨Ó¡A¾ã­Ó¬P¹Îªº«G«×³Q´î·t¤F10¸U­¿¥H¤W¡A
¦]¦¹±q1961¦~µo²{¦Ü¤µ¡A¤~µoÄ±¨ì³o­Ó¬P¹Îªº¯S®í¤§³B¡CClarkµ¥¤H±q2001¦~¶}©l«K
«ùÄò¶i¦æ³o­Ó¬P¹ÎªºÆ[´ú¬ã¨s¡A·í®É¦b¬P¹Î¤¤´ú©w¤F10´XÁû¿K¼ö¦Ó¯S®íªº¤j½è¶q«í¬P
¡A§Y©Ò¿×ªº¡u¨U¤Ò-·ç¸­¬P¡]Wolf-Rayet stars¡^¡v¡C

²{¦b¤w¯à½T©wªº¦¨­û¬P¬ù¦³200¦hÁû¡A¦Ó¥Bµ´¤j¦h¼Æ³£¬O½è¶q«D±`¤j¡B«D±`©ú«Gªº«í
¬P¡A¦³¨Ç«í¬Pªºª½®|¬Æ¦Ü°ª¹F¤Ó¶§ªº2000­¿¥ª¥k¡]¬ù¤g¬P­y¹D¤j¤p¡^¡C¦pªG§â§Ú­Ìªº
¤Ó¶§©ñ¨ì³o­Ó¬P¹Î¤¤¥¡¡A¨º»ò¤ÑªÅ¤¤±N·|¦³´X¦ÊÁû¹³º¡¤ë³o»ò«G¡B³o»ò¤jªº«í¬P¡C¦Ó
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¥ú¦~¡A³ôºÙ¬°»Èªe¨t¦~»´¬P¹Î¤¤½è¶q³Ì¤j¡B³Ì½o±Kªº«a­x¡C

¦¹¥~¡A¾ã­Ó¬P¹Î¹³¬O«í¬P°Êª«¶é¤@¯ë¡A©Ò¦³¤wª¾«í¬P³£¬O¥¿¦bºt¤Æªº¶W¤j½è¶q«í¬P¡A
±q¨U¤Ò-·ç¸­¬P¡BOB«¬¶W¥¨¬P¡]supergiants¡^¡B¶À¯S¶W¥¨¬P¡]Yellow Hypergiants
¡A«G«×¶W¹L¤Ó¶§«G«×100¸U­¿ªº«í¬P¡^¥H¤Î«GÂÅÅÜ¬P¡]Luminous Blue Variables¡A
Ãþ¦ü²î©³®yEta¬Pªº©Ç²§«í¬P¡^µ¥¡A©Ò¦³«í¬Pªº½è¶q³£¦Ü¤Ö¦b30¡ã40­¿¤Ó¶§½è¶q¥H¤W
¡F¨ä¤¤ªº¶À¯S¶W¥¨¬Pªº¼Æ¶q¡A¬O¾ã­Ó»Èªe¨t¤¤³Ì¦hªº¡C¥Ñ©ó«í¬P½è¶q·U¤j¡A¹Ø©R·Uµu
¡A¦]¦¹³o¨Ç«í¬P³£ÁÙ¦b¨S¨B¦V¦º¤`¶¥¬qªº¸Ü¡Aªí¥Ü³o­Ó¬P¹Î¤@©w«D±`¦~»´¡C³o¨Ç¤Ñ¤å
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¦Ó³o­Ó¬P¹Î¤¤§t¦³³o»ò¦hªº¶W¤j½è¶q«í¬P¡AÅã¥Ü¾ã­Ó¬P¹Î¤¤ªº«í¬P¼Æ¶q¤@©w«D±`Ãe¤j
¡CClarkµ¥¤Hªí¥Ü¡G¾ã­Ó»Èªe¨t¤¤¡A¤j©ó10­¿¤Ó¶§½è¶qªº¤j«í¬P»P¤@¯ëÃþ¤Ó¶§«í¬Pªº
¤ñ¨Ò¬ù¬°1:100¥ª¥k¡F¦Ó¬JµMWesterlund 1¤¤¤j½è¶q«í¬P°ª¹F¼Æ¦ÊÁû¡Aªí¥Ü¾ã­Ó¬P¹Î
§t¦³¦Ü¤Ö50¸UÁû¥H¤W¦¨­û¬P¡A¥u¤£¹L¦]µ´¤j³¡¤Àªº¦¨­û¬P³£¤ñ¸û¤p¦Ó·t¡A³Q¿@«pªº®ð
Åé¹Ð®J¾B½ª¦Ó¤£¥i¨£¡C¦pªG¥L­Ìªº²q´ú¥¿½T¡A¨º»òWesterlund 1±N¬O»Èªe¨t¤¤¦¨­û¼Æ
¶q³Ì¦hªº¦~»´¬P¹Î¡A¼Æ¶q¤ñ¨ä¥L¦~»´¬P¹Î¦h¤F10­¿¥H¤W¡C¦¹¥~¡A³o¨Ç¤Ñ¤å¾Ç®a²q´ú¡G
¬P¹ÎÁ`½è¶q¤ñ¦ì¦b»Èªe¤¤¤ßªþªñªº½o±K¬P¹Î¡]¦p¶ê«ý¬P¹ÎArches©Î¤­­M­L¬P¹ÎQuint
-uplet¡^ÁÙ¤j³\¦h¡A¦ý³o­ÓÆ[ÂIÁÙ»Ý«áÄòªº»·¬õ¥~Æ[´ú¨Ó½T©w¡C

¦ÓÅý³o¨Ç¤Ñ¤å¾Ç®a³Ì³Y²§ªº¡A¬O°ª¹F50¸UÁû¼Æ¶qªº«í¬P¥uÀ½¦bª½®|6¥ú¦~ªº½d³ò¤º¡F
¬Û¸û¤§¤U¡AÂ÷¤Ó¶§³Ìªñªº«í¬P--«nªù¤G¡]¥b¤H°¨®y£\¡^¡AÂ÷¤Ó¶§´N¤w4¥ú¦~»·¡A¥iª¾
¾ã­Ó¬P¹Î¦³¦h¾ÖÀ½¡I¦]¦¹«í¬P©¼¦¹¶¡¥²©w·|µo¥Í¸I¼²¡A¦³¥i¯à¥Ñ¦¹²£¥Í½è¶q¬ù100­¿
¤Ó¶§½è¶q¥H¤Wªº¤¤«¬¶Â¬}¡]ntermediate-mass black hole¡^¡A©Î³\Westerlund 1ªº
®Ö¤ß²{¦b´N¤w¸g¦³¤@Áû³o¼Ëªº¤¤«¬¶Â¬}¤F¡I

¦AªÌ¡A³o»òÃe¤jªº«í¬P±Ú¸s¡A¥²©w·|¹ï¬P¹Î©P¾DÀô¹Ò¦³­«¤j¼vÅT¡CClarkµ¥¤HÁr´ú¡G
¦b¹L¥h4000¸U¦~¤§¶¡¡A¥i¯à¦Ü¤Ö¦³¶W¹L1500Áûªº¶W·s¬P¦b¦¹Ãzµo¡C¯u¹³¬O»Èªeªº·Ï
¤õ¬I©ñ¤u¼t¡I

¬ÛÃö½×¤åµoªí¦b¤Ñ¤å»P¤Ñ¤åª«²z´Á¥Z¡]Astronomy and Astrophysics¡^¤¤¡C¡]"On
the massive stellar population of the Super Star Cluster Westerlund 1"
by J.S. Clark and colleagues¡^

°Ñ¦Ò¸ê®Æ¨Ó·½¡G
http://www.eso.org/outreach/press-rel/pr-2005/pr-08-05.html, 2003.03.22

* Âà¸ü¦Û»O¥_¤Ñ¤åÀ]

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