X-ray and ວິທະຍຸ observation of galaxy system Abell 2384 reveals collision of two galaxy clusters that travelled through each other forming a binodal system with a bridge of superhot gas between two cluster lobes and a bend in the bridge due to powerful jet of hot gas shooting away from a super heavy blackhole in the centre of a galaxy ໃນກຸ່ມ.
To put the whole thing in a perspective, the earth along with other ດາວເຄາະ and their satellites are part of the ‘stellar system’ of a ດາວ called sun. Each ດາວ may have such a system comprising of bodies ວົງໂຄຈອນ them. Large number of ດາວ bound together by gravity form a celestial entity called galaxy. For example, our solar system is part of a galaxy called ‘milky way’ which alone has about 100 thousand million ດາວ, each with their own stellar system. Hundreds of galaxies bound together by gravitational field form what we call ‘galaxy cluster’.
'Galaxy clusters’ are the largest objects in the ຈັກກະວານ, each comprising of hundreds of galaxies together with vast amount of super-hot gas cloud and large amount of dark matter. The interspersed superhot (30 – 100 million degrees Celsius) gas cloud is invisible to optical telescope but emits x-rays observable by the x-ray telescope. The dark matter does not emit, absorb or reflect any electro-magnetic radiation hence is not observable by any kind of telescope, but only by their gravitational interaction with the ‘white’ matter.
Several hundred million years ago, at a distance of about 1.2 billion light years away from us, two galaxy clusters collided and travelled through each other forming a merger-like system called Abell 2384 or A2384. Located in the constellation capricornus (one of the constellations of Zodiac and is known as ‘goat horn’), Abell 2384 is about 17 million light years across in size with two unequal cluster lobes connected by a three million light-year long bridge of hot gas.
ນັກດາລາສາດ ໄດ້ຮັບການເບິ່ງການປະກອບລະອຽດຂອງນີ້ galaxy ລະບົບກຸ່ມ, Abell 2384 ການນໍາໃຊ້ຂໍ້ມູນຫຼາຍຄື້ນຈາກສາມປະເພດທີ່ແຕກຕ່າງກັນຂອງແຫຼ່ງທີ່ໄດ້ກ່າວມາຂ້າງລຸ່ມນີ້:
1. ສີຟ້າ: ຂໍ້ມູນ X-ray ຈາກ Chandra X-Ray Observatory (X-ray ຊ່ອງ telescope launched by ອົງການ NASA in 1999) and XMM-Newton (X-ray ຊ່ອງ observatory launched by the European Space Agency in 1999).
2. Magenta: ວິທະຍຸ data from provided by Giant Metre-wave Radio Telescope (GMRT), India.
3. Yellow: Optical data from Digitized Sky Survey (DSS) by Space Telescope Science Institute.
The x-ray data obtained from the ຊ່ອງ observatories revealed high-density region extended between the two cluster heads corresponding to the unique hot gas bridge. Radio observation indicated x-ray-radio interaction at the cluster outskirts indicative of a peculiar radio galaxy. The conclusion is that of a powerful jet shooting away from a supermassive ຫຼຸມດໍາ in the centre of a galaxy within the galaxy cluster leading to bend in the shape of the gas bridge.
ການສຶກສານີ້ແມ່ນມີຄວາມສໍາຄັນສໍາລັບການພັດທະນາພື້ນຖານຄວາມຮູ້ກ່ຽວກັບການເຕີບໃຫຍ່ແລະຫຼັກສູດ ການລວມຕົວຂອງ galaxy clusters in the ຈັກກະວານ. Simulation suggests that the north and south clusters in the system Abell 2384 will eventually merge together with each other.
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ແຫລ່ງທີ່ມາ:
1. ຍານອະວະກາດສະຫະປະຊາໃນເອີຣົບ (ອົງການອະວະກາດເອີຣົບ) 2020. ຂົວໂຄ້ງລະຫວ່າງສອງກຸ່ມກາແລັກຊີ. ປະກາດວັນທີ 11 ພຶດສະພາ 2020. ວາງຈຳໜ່າຍອອນໄລນ໌ທີ່ http://www.esa.int/Science_Exploration/Space_Science/A_bent_bridge_between_two_galaxy_clusters ເຂົ້າໃຊ້ໃນວັນທີ 13 ພຶດສະພາ 2020.
2. Chandra X-Ray Observatory (NASA) 2020. Abell 2384: ໂຄ້ງຂົວລະຫວ່າງສອງກຸ່ມ Galaxy. ວັນທີປ່ອຍ: ພຶດສະພາ 11, 2020. ມີໃຫ້ອອນໄລນ໌ທີ່ https://chandra.si.edu/photo/2020/a2384/index.html ເຂົ້າໃຊ້ໃນວັນທີ 13 ພຶດສະພາ 2020.
3. Parekh V., Lagana TF, et al., 2020. ກໍລະນີທີ່ຫາຍາກຂອງການໂຕ້ຕອບ FR I ກັບຂົວ X-ray ຮ້ອນໃນກຸ່ມ Galaxy A2384. MNRAS 491, 2605–2616. DOI: https://doi.org/10.1093/mnras/stz3067
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