ÀÌ À̹ÌÁö¿¡ Ç¥½ÃµÈ ¸Å¿ì ¿Ö°î µÈ
Ãʽżº ÀÜÇØ°¡ ÀºÇÏ (Milky Way galaxy)¿¡ Çü¼ºµÈ
°¡Àå ÃÖ±ÙÀÇ ºí·¢È¦À» Æ÷ÇÔ ÇÒ ¼ö ÀÖ½À´Ï´Ù.
The image combines X-rays from NASA's Chandra X-ray Observatory in blue and green, radio data from the NSF's Very Large Array in pink, and infrared data from Caltech's Palomar Observatory in yellow.
À̹ÌÁö´Â NASAÀÇ ÆÄ¶õ Âùµå¶ó X-¼± °üÃø¼Ò, ³ì»ö, ºÐÈ«»öÀÇ NSFÀÇ ¸Å¿ì Å« ¹è¿¿¡¼ ¹«¼± µ¥ÀÌÅÍ, ³ë¶õ»öÀÇ Ä® Å×Å©ÀÇ Palomar õ¹®´ë¿¡¼ Àû¿Ü¼± µ¥ÀÌÅÍ¿¡¼ X-¼± Á¶È¸¦ ÀÌ·ç°í ÀÖ½À´Ï´Ù.
The remnant, called W49B, is about a thousand years old, as seen from Earth, and is at a distance about 26,000 light years away.
W49B¶ó°í ÀÜ¿©Àº, °°Àº Áö±¸¿¡¼ º¼ ¶§, õ ³â Á¤µµÀ̸ç, °Å¸® 26,000 ±¤³â¿¡ ´ëÇÑ °Å¸®¿¡ ÀÖ½À´Ï´Ù.
The supernova explosions that destroy massive stars are generally symmetrical, with the stellar material blasting away more or less evenly in all directions.
°Å´ëÇÑ º°À» ÆÄ±« ÃʽżºÀÇ Æø¹ßÀº ¸ðµç ¹æÇâÀ¸·Î ±ÕÀÏÇÏ°Ô ´õ ¸¹°Å³ª ÀûÀºÀ» ¸Ö¸® ³¯·Á ¹ö¸®´Â º°ÀÇ ¹°Áú·Î, ÀϹÝÀûÀ¸·Î ´ëĪÀÔ´Ï´Ù.
However, in the W49B supernova, material near the poles of the doomed rotating star was ejected at a much higher speed than material emanating from its equator.
±×·¯³ª, W49B Ãʽżº¿¡, ¿îÀÌ ´ÙÇÑ È¸Àü º° ±Ø ±ÙóÀÇ ¹°ÁúÀº ±× Àûµµ¿¡¼ ³ª¿À´Â ÀڷẸ´Ù ÈξÀ ´õ ³ôÀº ¼Óµµ·Î ¹èÃâµÇ¾ú´Ù.
Jets shooting away from the star's poles mainly shaped the supernova explosion and its aftermath.
º°ÀÇ ±Ø¿¡¼ ¶³¾îÁ® ÃÔ¿µ ºÐ»ç´Â ÁÖ·Î Ãʽżº Æø¹ß°ú »çÈÄ ¸ð¾ç.
By tracing the distribution and amounts of different elements in the stellar debris field, researchers were able to compare the Chandra data to theoretical models of how a star explodes.
º°ÀÇ ÆÄÆí Çʵ忡 ´Ù¸¥ ¿ä¼ÒÀÇ ºÐÆ÷¿Í ¾çÀ» ÃßÀûÇÔÀ¸·Î½á, ¿¬±¸ÀÚ º°ÀÌ Æø¹ßÇÏ´Â ¹æ¹ý¿¡ ÀÌ·ÐÀû ¸ðµ¨¿¡ Âùµå¶ó µ¥ÀÌÅ͸¦ ºñ±³ÇÒ ¼öÀÖ¾ú½À´Ï´Ù.
For example, they found iron in only half of the remnant while other elements such as sulfur and silicon were spread throughout.
ÀÌ·¯ÇÑ À¯È²°ú ½Ç¸®Äܰú °°Àº ´Ù¸¥ ¿ä¼Ò°¡ º¸±Þ µÈ ¿¹¸¦ µé¾î, ±×µéÀº ³²Àº ¸¸ ¹ÝÀ¸·Î öÀ» ¹ß°ßÇß´Ù.
This matches predictions for an asymmetric explosion.
ÀÌ ºñ´ëĪ Æø¹ß¿¡ ´ëÇÑ ¿¹Ãø°ú ÀÏÄ¡ÇÕ´Ï´Ù.
Also, W49B is much more barrel-shaped than most other remnants in X-rays and several other wavelengths, pointing to an unusual demise for this star.
¶ÇÇÑ, W49B ÈξÀ ´õ ¹è·² ¸ð¾çÀÇÀÌ º°¿¡ ƯÀÌÇÑ ºØ±«·Î ¿¬°áµÇ´Â X-·¹ÀÌ ¹× ±âŸ ¿©·¯ ÆÄÀåÀÇ ´Ù¸¥ ´ëºÎºÐÀÇ À¯¹°º¸´Ù ¼ö ÀÖ½À´Ï´Ù.
The authors also examined what sort of compact object the supernova explosion left behind.
ÀúÀÚ´Â ¶ÇÇÑ ÃʽżºÀÇ Æø¹ßÀÌ ³²±ä ¼ÒÇü °´Ã¼ÀÇ ¾î¶² Á¾·ù »ìÆì º¸¾Ò´Ù.
Most of the time, massive stars that collapse into supernovas leave a dense spinning core called a neutron star.
½Ã°£ÀÇ ´ëºÎºÐÀº, supernovas¿¡ ºØ±«°¡ Á¶¹Ð ÇÑ È¸Àü Áß½ÉÀ» µÎ´Â °ÍÀÌ °Å´ëÇÑ º°ÀÌ Áß¼ºÀÚ º°À»Çß´Ù.
Astronomers can often detect these neutron stars through their X-ray or radio pulses, although sometimes an X-ray source is seen without pulsations.
¶§·Î´Â X-¼± ¼Ò½º pulsations¾øÀÌ º¼ ¼öÀÖ´ÙÇÏÁö¸¸ õ¹®ÇÐÀº Á¾Á¾ ÀÚ½ÅÀÇ X-¼± ¶Ç´Â ¶óµð¿À ÆÞ½ºÀ» ÅëÇØ ÀÌ·¯ÇÑ Áß¼ºÀÚ º°À» ¹ß°ß ÇÒ ¼ö ÀÖ½À´Ï´Ù.
A careful search of the Chandra data revealed no evidence for a neutron star, implying an even more exotic object might have formed in the explosion, that is, a black hole.
Âùµå¶ó µ¥ÀÌÅÍÀÇÁÖÀÇ °Ë»ö ´õ ¸¹Àº À̱¹ÀûÀÎ ¸ñÀûÀº, ºí·¢È¦ Áï, Æø¹ß·Î Çü¼º µÉ ¾Ï½Ã, Áß¼ºÀÚ º°À» Áõ°Å¸¦ °ø°³ÇÏÁö ¾Ê½À´Ï´Ù.
This may be the youngest black hole formed in the Milky Way galaxy, with an age of only about a thousand years, as viewed from Earth (ie, not including the light travel time).
ÀÌ °°Àº Áö±¸¿¡¼ º¼ ¼ö õ ³â¿¡ ´ëÇÑ Àü¿ëÀÇ ³ªÀ̰¡ ÀºÇÏ (Milky Way galaxy)¿¡ Çü¼ºµÈ ÀþÀº ºí·¢È¦, (¾Æ´Ñ ºûÀÇ ¿©Çà ½Ã°£À» Æ÷ÇÔ ¿¹) µÉ ¼ö ÀÖ½À´Ï´Ù.
A well-known example of a supernova remnant in our galaxy that likely contains a black hole is SS433.
°¡´É¼ºÀÌ ºí·¢È¦À» Æ÷ÇÔ ¿ì¸® ÀºÇϰèÀÇ Ãʽżº ÀÜÇØÀÇ Àß ¾Ë·ÁÁø ¿¹´Â SS433ÀÔ´Ï´Ù.
This remnant is thought to have an age between 17,000 and 21,000 years, as seen from Earth, making it much older than W49B.
ÀÌ ³ª¸ÓÁö´Â W49Bº¸´Ù ÈξÀ ³ªÀ̰¡ ¸¸µå´Â Áö±¸¿¡¼ º¼·Î 17,000¿Í 2¸¸1õ³â »çÀÌÀÇ ¿¬·ÉÀ» °¡Áö°í »ý°¢µË´Ï´Ù.
The new results on W49B, which were based on about two-and-a-half days of Chandra observing time, appear in a paper in the Feb. 10, 2013 issue of the Astrophysical Journal.
Âùµå¶ó °üÂû ½Ã°£ÀÇ 2 ¹Ý ÀÏ¿¡ ´ëÇÑÀ» ¹ÙÅÁÀ¸·Î ÇÑ W49B¿¡ »õ·Î¿î °á°ú´Â 2¿ù 10ÀÏ, Astrophysical Àú³Î 2013 ¹®Á¦ÀÇ Á¾ÀÌ¿¡ ³ªÅ¸³³´Ï´Ù.
The authors of the paper are Laura Lopez, from the Massachusetts Institute of Technology (MIT), Enrico Ramirez-Ruiz from the University of California at Santa Cruz, Daniel Castro, also of MIT, and Sarah Pearson from the University of Copenhagen in Denmark.
Á¾ÀÌÀÇ ÀúÀÚ´Â ±â¼úÀÇ ¸Å»çÃß¼¼Ã÷ °ø°ú ´ëÇÐ (MIT), ¶ÇÇÑ MITÀÇ »êŸ Å©·çÁî (Santa Cruz), ´Ù´Ï¿¤ Ä«½ºÆ®·ÎÀÇ Ä¶¸®Æ÷´Ï¾Æ ´ëÇп¡¼ ¿£¸®ÄÚ ¶ó¹Ì·¹½º - ·çÀ̽º, µ§¸¶Å©ÀÇ ÄÚÆæÇÏ°Õ ´ëÇп¡¼ »ç¶ó ÇǾ¿¡¼ ·Î¶ó ·ÎÆäÁî ÀÖ½À´Ï´Ù.