Free Astronomy Magazine March-April 2025 ARABIC VERSION

der destructive conditions. D9, asthe newly discovered binary star is called,wasdetectedjustintime:itis estimated to be only 2.7 million years old, and the strong gravita- tional force of the nearby black hole will probably cause it to merge intoa single star within just one million years, a very narrow timespan for such a young system. “Thisprovidesonlyabriefwindow oncosmictimescalestoobservesuch a binary system — and we suc- ceeded!” explainsco-authorEmma Bordier,aresearcheralsoattheUni- versityofCologneandaformerstu- dent at ESO. For many years, scientists also thought that the extreme environ- mentnearasupermassiveblackhole prevented new stars from forming there. Several young stars found in close proximity to Sagittarius A*have disproved this assumption. The discovery of the young binary star now shows that even stellar pairs have the potential to form in these harsh conditions. “The D9 system shows clear signs of the presence of gasanddustaroundthestars,which MARCH-APRIL2025 ﻣﺠﻠﺔ FreeAstronomy ﺎﻟﻌﺮ ﺔ 45 ﻈﻬـﺮ ﻓــﻲ اﻟــﺨﻠﻔ ﺔ إﻃـﻼق ﺿــﻮء ﻟـ ر ﻳ ﻠــﻎ ﻣــﻦ ﺗﻠﺴـ ﻮب ﻳﻴﺒــﻮن اﻟـﺬ ﻗﻄﺮﻩ 8.2 ﻣ وﻫﻮ ﺟﺰء ﻣﻦ ﺗﺸ ﻞ اﻟﺘﻠﺴ ﻮب اﻟﻜﺒـ اﻟﺘﻠﺴ ﻮ ﺎت اﻟ ﺟﺪا ﺎﺗﺠﺎﻩ ﻣﺮﻛﺰﻣﺠﺮﻨ ﺎ ﻧﺤﻮ ﻣﺮﻛﺰ ـاﻟ ﺠﺰء اﻷﻛ ﺳﻄﻮﻋﺎً ﻣﻦ در اﻟﺘ ﺎﻧﺔ . أﻋــــﻼﻩ : ـــــﺎﻟﻘﺮ ﻣـــــﻦ ــــﺪوران ﺣـــــﻮل ﻌﻀـــــﻬﻤﺎ ﺗـــــﻢ اﻟﻌﺜـــــﻮر ﻋﻠـــــﻰ ﻧ ﻤـــــ ﺳﺎﺟ ﺘﺎر ﻮس أ * اﻟﺜﻘﺐ اﻷﺳﻮد اﻟﻬﺎﺋﻞ ﻓـﻲﻣﺮﻛـﺰ در اﻟﺘ ﺎﻧـﺔ . إن ﻧﻈـﺎم ـــﺪ اﻟــــ ﺘﺸــــ ﻞ وﻳ ﻘـــﻰﻋﻠــــﻰﻗ ــــﺔ اﻟﺸـــﺎب اﻟــــﺬ اﻟﻨﺠـــﻮم اﻟﺜﻨﺎﺋ ـ ﺤ ﺎة ﻓــــﻲ ـ ﻫـﺬﻩ اﻟـ أن اﻟﺜﻘــﻮب اﻟﺴـﻮداء ﻟ ﺴــﺖ ﻣـﺪﻣﺮة ﻤـﺎ ﺠﺎذﺑ ﺔ اﻟﺸــﺪ ﺪة ﻌـ ﻛﻨﺎ ﻧﻌﺘﻘﺪ . ﻠﺨﺺﻫﺬا اﻟﻔ ﺪﻳﻮ اﻻﻛﺘﺸﺎف . [G. Hüdepohl (atacamaphoto.com )/ESO] ﺗﻢ اﻛﺘﺸ ﺎف اﻟﻨﺠﻢ اﻟﺜﻨﺎﺋﻲ ا ﻜﺘﺸﻒ ﺣـﺪﻳﺜًﺎ واﻟﺬي ﻳُﺴﻤﻰ D9 ﰲ اﻟﻮﻗﺖ ا ﻨﺎﺳﺐ : ﺣﻴـﺚ ﻳُﻘﺪر ﻋﻠﻤﺎء اﻟﻔﻠﻚ ﻋﻤﺮه ﺑﻨﺤﻮ 2.7 ﻣﻠﻴـﻮن ﻋﺎم ﻓﻘﻂ وﻣﻦ ا ﺤﺘﻤﻞ أن ﺗﺘﺴﺒﺐ اﻟﺠﺎذﺑﻴﺔ اﻟﻘﻮﻳﺔ ﻟﻠﺜﻘﺐ اﻷﺳﻮد اﻟﻘﺮﻳﺐ ﰲ اﻧﺪﻣﺎﺟﻪ ﰲ ﻧﺠﻢ واﺣﺪ ﰲ ﻏﻀﻮن ﻣﻠﻴﻮن ﻋﺎم ﻓﻘﻂ وﻫﻲ ﺗﻌﺘﱪ ﻓﱰة زﻣﻨﻴﺔ ﻗﺼ ة ﻟﻠﻐﺎﻳﺔ ﺜـﻞ ﻫـﺬا اﻟﻨﻈﺎم اﻟﺸﺎب . ﺗﻮﺿﺢ ا ﺆﻟﻔﺔ ا ﺸﺎرﻛﺔ إﻳﻤﺎ ﺑﻮردﻳﻴﻪ، وﻫﻲ ﺑﺎﺣﺜﺔ أﻳﻀًـﺎ ﰲ ﺟﺎﻣﻌـﺔ ﻛﻮﻟﻮﻧﻴـﺎ وﻃ ﺎﻟﺒـﺔ ﺳﺎﺑﻘﺔ ﰲ ا ﺮﺻﺪ اﻷوروﺑﻲ اﻟﺠﻨـﻮﺑﻲ ﻫـﺬا " ﻳﻮﻓﺮ ﻧﺎﻓﺬة ﻗﺼـ ة ﻓﻘـﻂ ﻋـﲆ ا ﻘـﺎﻳﻴﺲ اﻟﺰﻣﻨﻴﺔ اﻟﻜﻮﻧﻴﺔ ﺮاﻗﺒﺔ ﻣﺜـﻞ ﻫـﺬا اﻟﻨﻈـﺎم اﻟﺜﻨﺎﺋﻲ وﻗﺪ ﻧﺠﺤﻨﺎ ."! ﻟﺴﻨﻮات ﻋﺪﻳـﺪة اﻋﺘﻘـﺪ اﻟﻌﻠﻤـﺎء أﻳﻀًـﺎ أن اﻟﺒﻴﺌﺔ ا ﺘﻄﺮﻓﺔ ﺣﻮل اﻟﺜﻘﺐ اﻷﺳﻮد اﻟﻬﺎﺋﻞ ﺗﻤﻨﻊ ﺗﺸﻜﻞ ﻧﺠ ﻮم ﺟﺪﻳﺪة ﻫﻨﺎك وﻗﺪ دﺣﺾ ﻧﺸﻮء اﻟﻌﺪﻳﺪ ﻣﻦ اﻟﻨﺠﻮم اﻟﺸﺎﺑﺔ اﻟﺘـﻲ ﻋﺜـﺮ ﻋﻠﻴﻬﺎ ﻋﲆ ﻣﻘﺮﺑﺔ ﻣﻦ ﺳﺎﺟﻴﺘﺎرﻳﻮس أ * ﻫﺬا اﻻﻋﺘﻘـﺎد . ﻟﻘــﺪ اﻇﻬـﺮ اﻛﺘﺸـﺎف اﻟﺜﻨ ـﺎﺋﻲ اﻟﻨﺠﻤــﻲ اﻟﺸــﺎ ب اﻵن أﻧــﻪ ﺣﺘــﻰ اﻷزواج اﻟﻨﺠﻤﻴﺔ ﻟﺪﻳﻬﺎ اﻟﻘﺪرة ﻋﲆ اﻟﺘﻜـﻮن ﰲ ﻫـﺬه اﻟﻈﺮوف اﻟﻘﺎﺳﻴﺔ . ﻳﻈﻬﺮ ﻧﻈﺎم D9 ﻋﻼﻣﺎت واﺿﺤﺔ ﻋﲆ وﺟـﻮد اﻟﻐـﺎز واﻟﻐﺒـﺎر ﺣـﻮل اﻟﻨﺠﻮم وﻫﺬا ﻳﺸ إﱃ أﻧﻪ ﻗﺪ ﻳﻜﻮن ﻧﻈﺎﻣـﺎ ــ ﺮﻳﻞ ﺃﺑ - ﻣﺎﺭﺱ 2 0 2 5