2MASS J18082002-5104378 sahifasining manbasini koʻrish

'''2MASS J18082002-5104378''' (qisqacha '''J1808-5104''') — Quyoshdan taxminan 1950 yorugʻlik yili uzoqlikda joylashgan [[Qurbongoh]] yulduzlar turkumidagi juda kambagʻal metall [[Qoʻshaloq yulduzlar|yulduz]]<ref name="DJM-2018">{{veb manbasi |author=Staff |title=Finding the constellation which contains given sky coordinates |url=http://djm.cc/constellation.html |date=2018 |work=DJM.cc |accessdate=2018-11-05 |archive-date=2019-08-15 |archive-url=https://web.archive.org/web/20190815143107/http://djm.cc/constellation.html |deadlink=no }}</ref>. Bu juft spektrli yulduzdir<ref name="ApJ-20181105">{{статья|заглавие=An Ultra Metal-poor Star Near the Hydrogen-burning Limit|doi=10.3847/1538-4357/aadd97|издание=[[The Astrophysical Journal]]|arxiv=1811.00549|том=867|страницы=98|язык=en|тип=journal|автор=Schlaufman, Kevin C.; Thompson, Ian B.; Casey, Andrew R.|число=5|месяц=11|год=2018|издательство=[[IOP Publishing]]}}</ref><ref name=melendez>{{статья|bibcode=2016A&A...585L...5M|заглавие=2MASS J18082002-5104378: The brightest (V = 11.9) ultra metal-poor star|том=585|страницы=L5|doi=10.1051/0004-6361/201527456|язык=en|тип=journal|автор=Meléndez, Jorge; Placco, Vinicius M.; Tucci-Maia, Marcelo; Ramírez, Iván; Li, Ting S.; Perez, Gabriel|год=2016|издание=[[Astronomy and Astrophysics]]|издательство=[[EDP Sciences]]}}</ref><ref>Schlaufman, Kevin C.; Thompson, Ian B.; Casey, Andrew R. An Ultra Metal-poor Star Near the Hydrogen-burning Limit (англ.) // The Astrophysical Journal : journal. — IOP Publishing, 2018. — 5 November (vol. 867). — P. 98. — doi:10.3847/1538-4357/aadd97. — arXiv:1811.00549.</ref>.

== Xususiyatlari ==

=== Asosiy komponent ===
Juft yulduzning asosiy komponenti 2MASS J18082002-5104378 A subgigant boʻlib, Quyoshdan sovuqroq, lekin kattaroq va [[Yulduz yorqinligi|yorqinroq]] boʻladi<ref name="BGR-20181105">{{yangiliklar manbasi |last=Wehner |first=Mike |title=Astronomers spot one of the oldest stars ever |url=https://bgr.com/2018/11/05/oldest-star-ever-astronomy-milky-way/ |date=2018-11-05 |work=[[Boy Genius Report|BGR]] |accessdate=2018-11-05 |archivedate=2018-11-06 |archiveurl=https://web.archive.org/web/20181106051425/https://bgr.com/2018/11/05/oldest-star-ever-astronomy-milky-way/ }}</ref>.

=== Ikkilamchi komponent ===
Kuzatib boʻlmaydigan ikkilamchi 2MASS J18082002-5104378 B qizil mitti hisoblanadi, orbital davri P = {{Val|34.757|0.010|0.010}}<nowiki></br></nowiki> {{Val|34.757|0.010|0.010}} kun va taxminan 0,14 quyosh massasi. Bu metallar juda kam boʻlgan birinchi kashf etilgan past massali yulduz va koinotdagi eng qadimgi yulduzlardan biri boʻlib, yoshi 13,53 milliard yil<ref name="SCI-20181106" />; deyarli butunlay [[Katta portlash]] materiallaridan tashkil topgan birinchi yulduzlardan biri boʻlishi mumkin<ref name="SCI-20181106">{{yangiliklar manbasi |author=News Staff |title=One of Milky Way’s Oldest Stars Discovered |url=http://www.sci-news.com/astronomy/ultra-metal-poor-star-06577.html |date=2018-11-06 |work=SciNews.com |accessdate=2018-11-06 |archivedate=2018-11-06 |archiveurl=https://web.archive.org/web/20181106230917/http://www.sci-news.com/astronomy/ultra-metal-poor-star-06577.html }}</ref>. Metalllarning koʻpligi Quyoshdagi metallar qiymatini taxminan 1/10 000 qismini tashkil qiladi<ref name="SR-20181105-go">{{veb manbasi |author=[[Gemini Observatory]] |title=A Tiny Old Star Has A Huge Impact |url=http://spaceref.com/astronomy/a-tiny-old-star-has-a-huge-impact.html |date=2018-11-05 |work=SpaceRef.com |accessdate=2018-11-06 }}{{Oʻlikhavola|date=iyun 2023 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>. Bu metallga juda kambagʻal boʻlgan eng yorqin yulduzdir Galaktikaning ingichka diskining bir qismi boʻlib, bunday past metallli va eski yulduz uchun gʻayrioddiy<ref name="JHU-20181105" />. {{Val|13.53|ul=Gyr}} milliard yil boʻlgan bu obyekt maʼlum boʻlgan eng qadimgi yupqa disk yulduzi boʻlib, ingichka diskning oʻzidan bir necha milliard yil katta<ref name="JHU-20181105">{{yangiliklar manbasi |last=Rosen |first=Jill |title=Johns Hopkins scientist finds elusive star with origins close to Big Bang - The newly discovered star's composition indicates that, in a cosmic family tree, it could be as little as one generation removed from the Big Bang |url=https://hub.jhu.edu/2018/11/05/scientists-find-star-with-big-bang-origins/ |date=2018-11-05 |work=[[Johns Hopkins University]] |accessdate=2018-11-05 |archivedate=2018-11-06 |archiveurl=https://web.archive.org/web/20181106021959/https://hub.jhu.edu/2018/11/05/scientists-find-star-with-big-bang-origins/ }}</ref><ref name="EA-20181105">{{yangiliklar manbasi |author=[[Johns Hopkins University]] |title=Johns Hopkins scientist finds elusive star with origins close to Big Bang |url=https://www.eurekalert.org/pub_releases/2018-11/jhu-jhs110518.php |date=2018-11-05 |work=[[EurekAlert!]] |accessdate=2018-11-05 |archivedate=2018-11-06 |archiveurl=https://web.archive.org/web/20181106132235/https://www.eurekalert.org/pub_releases/2018-11/jhu-jhs110518.php |access-date=2022-05-30 |archive-date=2018-11-06 |archive-url=https://web.archive.org/web/20181106132235/https://www.eurekalert.org/pub_releases/2018-11/jhu-jhs110518.php |url-status=dead }}</ref>.

Kuzatilmagan hamroh yulduzning kashf etilishini tavsiflovchi tadqiqot mualliflaridan biri<ref name="SA-20181105">{{yangiliklar manbasi |last=Starr |first=Michelle |title=Astronomers Have Detected One of The Oldest Stars in The Entire Universe |url=https://www.sciencealert.com/tiny-ancient-metal-poor-star-in-the-milky-way-could-be-one-of-the-oldest-in-the-universe |date=2018-11-05 |work=ScienceAlert.com |accessdate=2018-11-05 |archivedate=2018-11-05 |archiveurl=https://web.archive.org/web/20181105093624/https://www.sciencealert.com/tiny-ancient-metal-poor-star-in-the-milky-way-could-be-one-of-the-oldest-in-the-universe }}</ref>, astronom Kevin Shlaufmanning soʻzlariga koʻra, Bu yulduz 10 milliondan bittasi boʻlishi mumkin. U birinchi avlod yulduzlari haqida baʼzi muhim maʼlumotlarni taqdim etadi.“Shlaufman shunday deydi: "Quyosh, ehtimol, oʻnlab oldingi avlodlar massiv, qisqa umr koʻrgan yulduzlar moddasidan paydo boʻlgan … Bu yulduz, ehtimol, faqat bitta oʻtmishdoshiga ega edi … Oʻtkazilgan kuzatishlar bir kun kelib birinchi yulduzlarning kashf etilishiga olib kelishi mumkin"<ref name="NAtlas-20181105">{{yangiliklar manbasi |last=Irving |first=Michael |title=13.5 billion year old star was born just after the Big Bang - and it’s in our neighborhood |url=https://newatlas.com/ancient-star-one-generation-big-bang/57089/ |date=2018-11-05 |work=NewAtlas.com |accessdate=2018-11-05 |archivedate=2018-11-05 |archiveurl=https://web.archive.org/web/20181105092817/https://newatlas.com/ancient-star-one-generation-big-bang/57089/ }}</ref>. Astronom va tadqiqot hammuallifi Endryu Keysi taʼkidlashicha, koinotdagi birinchi yulduzlar katta massaga ega boʻlishi shart emas, baʼzi yulduzlar kichik hajmdagi materiyadan hosil boʻlishi va hozirgi kungacha saqlanib qolgan boʻlishi mumkin<ref name="TE-20181105">{{yangiliklar manbasi |last=Malewar |first=Amit |title=Johns Hopkins scientists may have found one of the universe’s oldest stars - One of the universe’s oldest stars. |url=https://www.techexplorist.com/johns-hopkins-scientists-may-have-found-one-of-the-universes-oldest-stars/18215/ |date=2018-11-05 |work=TechExplorist.com |accessdate=2018-11-05 |archivedate=2018-11-05 |archiveurl=https://web.archive.org/web/20181105203437/https://www.techexplorist.com/johns-hopkins-scientists-may-have-found-one-of-the-universes-oldest-stars/18215/ }}</ref><ref name=mezzeddine>{{статья
|bibcode=2018ApJ...863..168E
|заглавие=Revisiting the Iron Abundance in the Hyper Iron-poor Star HE 1327–2326 with UV COS/HST Data
|том=863
|номер=2
|страницы=168
|doi=10.3847/1538-4357/aad3cb
|язык=en
|тип=journal
|автор=Ezzeddine, Rana; Frebel, Anna
|год=2018
|издание=[[The Astrophysical Journal]]
|издательство=[[IOP Publishing]]
}}</ref>.

== Manbalar ==
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== Havolalar ==
* {{youTube|O2D1XDHEO-I|Video (00:30) – Orbit of Newly Found 13.5 Billion-Year-Old Star }} (5 November 2018; [[Johns Hopkins University]]){{ref-en}}
[[Turkum:Qoʻshaloq yulduzlar]]