File:HR 6819.jpg
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Summary
DescriptionHR 6819.jpg |
العربية: تصويرٌ لِمدار الأجرام الفلكيَّة التابعة لِنظام HR 6819 ثُلاثي النُجُوم. يتكوَّن هذا النظام من ثُنائي داخلي بنجمٍ وحيدٍ (المدار الأزرق) وثُقبٌ أسود حديث الاكتشاف (المدار الأحمر)، إضافةً إلى جرمٍ ثالثِ، ونجمٌ آخر، في مدارٍ أوسع (بِالأزرق أيضًا). اعتقد الفريق بدايةً أنَّ هُناك جرمان فقط، وهُما النجمان. لكن مع استمرار تحليلهم لِلمعلومات المُرصدة، فوجئوا بِاكتشافهم جرمًا ثالثًا، لم يكن ظاهرًا قبلًا، في نظام HR 6819، وهو ثُقبٌ أسود، الأقرب إلى الأرض حتَّى تاريخ اكتشافه. والثقب الأسود المذكور غير مرئي، لكن يؤكَّد وُجُوده بِفعل قُوَّاه الجاذبة، التي تدفع النجم المُشع الداخلي إلى التحرُّك ضمن مدار. للأجرام الواقعة ضمن النظام الثُنائي الداخلي ذات الكُتلة والمدار تقريبًا. أظهرت عمليَّات الرصد أنَّ النجم الداخلي المرئي يدُورُ حول الثُقب الأسود كُل 40 يوم، بينما النجمُ الآخر يقع على مسافةٍ بعيدةٍ من الثُنائي الداخلي.
English: This artist’s impression shows the orbits of the objects in the HR 6819 triple system. This system is made up of an inner binary with one star (orbit in blue) and a newly discovered black hole (orbit in red), as well as a third object, another star, in a wider orbit (also in blue). The team originally believed there were only two objects, the two stars, in the system. However, as they analysed their observations, they were stunned when they revealed a third, previously undiscovered body in HR 6819: a black hole, the closest ever found to Earth. The black hole is invisible, but it makes its presence known by its gravitational pull, which forces the luminous inner star into an orbit. The objects in this inner pair have roughly the same mass and circular orbits. The observations, with the FEROS spectrograph on the 2.2-metre telescope at ESO’s La Silla, showed that the inner visible star orbits the black hole every 40 days, while the second star is at a large distance from this inner pair. |
Date | |
Source | https://www.eso.org/public/images/eso2007a/ |
Author | ESO/L. Calçada |
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Licensing
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Their website states: "Unless specifically noted, the images, videos, and music distributed on the public ESO website, along with the texts of press releases, announcements, pictures of the week, blog posts and captions, are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. | |
This file is licensed under the Creative Commons Attribution 4.0 International license.
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Items portrayed in this file
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6 May 2020
image/jpeg
File history
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Date/Time | Dimensions | User | Comment | |
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current | 09:09, 7 May 2020 | 5,000 × 3,000 (1.53 MB) | Labdajiwa | Uploaded a work by ESO/L. Calçada from https://www.eso.org/public/images/eso2007a/ with UploadWizard |
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Metadata
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Date and time of data generation | 14:00, 6 May 2020 |
File change date and time | 16:35, 27 April 2020 |
Date and time of digitizing | 18:22, 27 April 2020 |
Date metadata was last modified | 18:35, 27 April 2020 |
Credit/Provider | ESO/L. Calçada |
Source | European Southern Observatory |
Unique ID of original document | xmp.did:5323e173-0a39-da48-8fbc-afd04f8666c2 |
Short title |
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Keywords | HR 6819 |
Contact information |
Karl-Schwarzschild-Strasse 2 Garching bei München, None, D-85748 Germany |
Usage terms |
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IIM version | 4 |
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