This page describes an image A binary brown dwarf system revealed
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This image presents a nearby system of brown dwarfs, objects that fall between planets and stars in mass and do not sustain long-term nuclear fusion in their cores. Located about 6.5 light-years from Earth, this system (known as Luhman 16) is the third closest system to the Solar System after the Alpha Centauri system and Barnard's Star. It was initially observed as what seemed to be a single faint source of infrared light. Brown dwarfs are often difficult to study because of their low brightness, especially in visible light. However they shine brighter in infrared light due to their cooler effective temperatures.
The comparison highlights the importance of observational resolution. The image at the center, taken by NASA’s Wide-field Infrared Survey Explorer (WISE), shows the system as a single blurred object due to its lower resolution (WISE has a resolution of roughly 6 arcseconds). A highlighted zoomed-in view from the Gemini South Observatory in Chile reveals that this “single” source is actually a binary system of two brown dwarfs. The improved angular resolution (roughly 0.6 arcseconds) allows astronomers to separate the two objects clearly, demonstrating how higher-resolution observations uncover hidden structures in the universe. While the Gemini telescope is situated on the Earth and thus is affected by the blurring effects of the Earth's atmosphere, it has a substantially larger mirror than the WISE telescope (8m wide vs. 40cm wide) meaning it can achieve much higher resolutions.
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图片来源 NASA/JPL/Gemini Observatory/AURA/NSF 来源链接
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图片说明 This image presents a nearby system of brown dwarfs, objects that fall between planets and stars in mass and do not sustain long-term nuclear fusion in their cores. Located about 6.5 light-years from Earth, this system (known as Luhman 16) is the third closest system to the Solar System after the Alpha Centauri system and Barnard's Star. It was initially observed as what seemed to be a single faint source of infrared light. Brown dwarfs are often difficult to study because of their low brightness, especially in visible light. However they shine brighter in infrared light due to their cooler effective temperatures.
The comparison highlights the importance of observational resolution. The image at the center, taken by NASA’s Wide-field Infrared Survey Explorer (WISE), shows the system as a single blurred object due to its lower resolution (WISE has a resolution of roughly 6 arcseconds). A highlighted zoomed-in view from the Gemini South Observatory in Chile reveals that this “single” source is actually a binary system of two brown dwarfs. The improved angular resolution (roughly 0.6 arcseconds) allows astronomers to separate the two objects clearly, demonstrating how higher-resolution observations uncover hidden structures in the universe. While the Gemini telescope is situated on the Earth and thus is affected by the blurring effects of the Earth's atmosphere, it has a substantially larger mirror than the WISE telescope (8m wide vs. 40cm wide) meaning it can achieve much higher resolutions.
图片来源 NASA/JPL/Gemini Observatory/AURA/NSF
相关术语表词条： Angular Resolution , Binary Star , Brown Dwarf , Resolution
图片说明 Questa immagine mostra un sistema vicino di nane brune, oggetti che per massa si collocano a metà strada tra i pianeti e le stelle e che non mantengono una fusione nucleare a lungo termine nei loro nuclei. Situato a circa 6,5 anni luce dalla Terra, questo sistema (noto come Luhman 16) è il terzo sistema più vicino al Sistema Solare dopo il sistema di Alpha Centauri e la Stella di Barnard. Inizialmente è stato osservato come quella che sembrava essere una singola e debole fonte di luce infrarossa. Le nane brune sono spesso difficili da studiare a causa della loro scarsa luminosità, specialmente nella luce visibile. Tuttavia, brillano di più nella luce infrarossa grazie alle loro temperature effettive più fredde.
Il confronto evidenzia l'importanza della risoluzione osservativa. L'immagine al centro, scattata dal Wide-field Infrared Survey Explorer (WISE) della NASA, mostra il sistema come un unico oggetto sfocato a causa della sua risoluzione inferiore (WISE ha una risoluzione di circa 6 secondi d'arco). Una vista ingrandita e evidenziata dall'Osservatorio Gemini Sud in Cile rivela che questa "singola" sorgente è in realtà un sistema binario di due nane brune. La risoluzione angolare migliorata (circa 0,6 secondi d'arco) permette agli astronomi di separare chiaramente i due oggetti, dimostrando come le osservazioni ad alta risoluzione rivelino strutture nascoste nell'universo. Sebbene il telescopio Gemini sia situato sulla Terra e sia quindi soggetto agli effetti di sfocatura dell'atmosfera terrestre, ha uno specchio sostanzialmente più grande rispetto al telescopio WISE (8 metri di diametro contro 40 centimetri), il che significa che può raggiungere risoluzioni molto più elevate.
图片来源 NASA/JPL/Osservatorio Gemini/AURA/NSF
相关术语表词条： Nana bruna , Risoluzione , Risoluzione angolare , Stella binaria 注释翻译状态: 尚未由审核人员批准
注释翻译者: Giuliana Giobbi
