Glossary term: सक्रिय गॅलेक्टिक केंद्रक (ऍक्टिव्ह गॅलेक्टिक न्युक्लीअस)
Description: सक्रिय गॅलेक्टिक न्यूक्लियस (एजीएन) हा आकाशगंगेच्या मध्यभागी असलेला एक अतिशय प्रकाशमय प्रदेश आहे. हे एका सुपरमॅसिव्ह (खूप मोठ्या) ब्लॅक होल (कृष्णविवर) द्वारे समर्थित असल्याचे मानले जाते जो सभोवतालचे पदार्थ खेचून घेतो आणि त्याच्या सभोवताली एक अत्यंत गरम अभिवृद्धी तबकडी तयार करते. एजीएन मध्ये अनेक भिन्न प्रदेशांसह बरीच गुंतागुंतीची रचना असते जी भिन्न वैशिष्ट्यांसह प्रकाश उत्सर्जित करतात आणि बहुतेक वेळा धूळयुक्त डोनट-आकाराच्या जागेने वेढलेले असतात. एजीएन कधीकधी विरुद्ध दिशेने पदार्थांचे जेट्स पाठवते. अनेक आकाशगंगांच्या मध्यभागी एक सुपरमॅसिव्ह ब्लॅक होल असले, तरी सर्वच पदार्थ अभिवृद्धी करणारे नसतात आणि म्हणून सर्वच एजीएन नसतात.
एजीएन ही एक सामान्य संज्ञा आहे ज्यामध्ये क्वाझार, ब्लेझार, सीफर्ट आकाशगंगा आणि रेडिओ आकाशगंगा यासारख्या वस्तूंचा समावेश होतो. एजीएन चा काही भाग वेगवेगळ्या कोनातून पाहिल्यामुळे अशा वस्तूंचे भिन्न निरीक्षण गुणधर्म दिसतात.
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".
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In Other Languages
- अरेबिक: النواة المجرية النشطة
- बंगाली: সক্রিয় ছায়াপথ কেন্দ্রীণ
- जर्मन: Aktiver Galaktischer Kern
- इंग्रजी: Active Galactic Nucleus
- स्पॅनिश : Núcleo Galáctico Activo
- फ्रेंच: Noyau actif de galaxie
- हिंदी: सक्रिय गैलेक्टिक नाभिक (ऍक्टिव्ह गॅलेक्टिक न्युक्लीअस)
- इटालियन: Nucleo galattico attivo
- जपानी: 活動銀河核 (external link)
- कोरियन: 활동은하핵
- ब्रझिलियन पोर्तुगीज: Núcleo Galáctico Ativo
- सोपी चायनिज: 活动星系核
- पारंपारिक चायनिज: 活動星系核
Related Media
Jet Ejected from the Active Galaxy M87
Caption: A 3000-light-year-long jet streaming from the core of galaxy M87, as captured by the Hubble Space Telescope. The center of this image shows the core of the elliptical galaxy M87 (in the constellation Virgo) which hosts an active galactic nucleus (AGN).
An AGN is a very luminous region around a supermassive black hole. It is powered by matter falling towards the black hole and forming a hot accretion disk. Many galaxies host a supermassive black hole, but not all of them are accreting enough matter to appear as an AGN.
The strong gravity of the supermassive black hole in the heart of M87 has caused a huge jet of charges particles to be flung out from the accretion disk. This extends far out into the galaxy itself, beyond the core region. Here we see the jet as a whitish-blue line which gets wider the further it goes from the core. The light emission we see here is caused by the energetic electrons in the jet interacting with magnetic fields.
Credit: NASA, ESA, A. Lessing (Stanford University), E. Baltz (Stanford University), M. Shara (AMNH), J. DePasquale (STScI)
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License: CC-BY-4.0 Creative Commons Attribution 4.0 International (CC BY 4.0) icons
Hubble Image of Barred Spiral Galaxy UGC 6093
Caption: This image from the Hubble Space Telescope shows the barred spiral galaxy UGC 6093. This galaxy has two spiral arms in its outer regions but the inner edge of each arm joins with the outer edge of a straight bar feature that goes across the galaxy's center.
This galaxy has been classified as an active galaxy due to the emissions of certain lines in its spectrum. This indicates that the supermassive black hole that lies in the center of the galaxy is accreting gas from its surroundings. Unlike some active galactic nuclei (AGN), the center of this galaxy does not shine especially brightly in the visible light so its status as an AGN is not immediately visible from this image.
Credit: ESA/Hubble & NASA
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License: CC-BY-4.0 Creative Commons Attribution 4.0 International (CC BY 4.0) icons
