مورد إلكتروني
A solar metallicity galaxy at z > 7? Possible detection of the [N II] 122 mu m and [O III] 52 mu m lines
| العنوان: | A solar metallicity galaxy at z > 7? Possible detection of the [N II] 122 mu m and [O III] 52 mu m lines |
|---|---|
| المصدر: | Killi , M , Watson , D , Fujimoto , S , Akins , H , Knudsen , K , Richard , J , Harikane , Y , Rigopoulou , D , Rizzo , F , Ginolfi , M , Popping , G & Kokorev , V 2023 , ' A solar metallicity galaxy at z > 7? Possible detection of the [N II] 122 mu m and [O III] 52 mu m lines ' , Monthly Notices of the Royal Astronomical Society , vol. 521 , no. 2 , pp. 2526-2534 . |
| بيانات النشر: | 2023-03-14 |
| تفاصيل مُضافة: | Killi, Meghana Watson, Darach Fujimoto, Seiji Akins, Hollis Knudsen, Kirsten Richard, Johan Harikane, Yuichi Rigopoulou, Dimitra Rizzo, Francesca Ginolfi, Michele Popping, Gergo Kokorev, Vasilii |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | We present the first detection of the [NII] 122 mu m and [O III ] 52 mu m lines for a reionization-epoch galaxy. Based on these lines and previous [C II ] 158 mu m and [O III ] 88 mu m measurements, using two different radiati ve transfer models of the interstellar medium, we estimate an upper limit on electron density of < 500 cm(-3) and an approximate gas-phase metallicity of Z/Z(circle dot) similar to 1.1 +/- 0.2 for A1689-zD1, a gravitationally lensed dusty galaxy at z = 7.133. Other measurements or indicators of metallicity so far in galaxy interstellar media at z greater than or similar to 6 are typically an order of magnitude lower than this. The unusually high metallicity makes A1689-zD1 inconsistent with the fundamental metallicity relation, although there is likely significant dust obscuration of the stellar mass, which may partly resolve the inconsistency. Given a solar metallicity, the dust-to-metals ratio is a factor of several lower than expected, hinting that galaxies be yond z similar to 7 may hav e lower dust formation efficiency . Finally , the inferred nitrogen enrichment compared to oxygen, on which the metallicity measurement depends, indicates that star formation in the system is older than about 250 Myr, pushing the beginnings of this galaxy to z > 10. |
| مصطلحات الفهرس: | ISM:abundances, galaxies:high-redshift, galaxies:individual:(A1689-zD1), galaxies:ISM, submillimetre:galaxies, N/O ABUNDANCE RATIOS, LYMAN-BREAK GALAXY, BIG 3 DRAGONS, MASS-METALLICITY, STAR-FORMATION, INTERSTELLAR-MEDIUM, DUST-CONTINUUM, PHYSICAL CONDITIONS, OIII 88-MU-M, ALMA, article |
| URL: | |
| الإتاحة: | Open access content. Open access content info:eu-repo/semantics/openAccess |
| ملاحظة: | application/pdf English |
| أرقام أخرى: | DAV oai:pure.atira.dk:publications/71045623-89a3-41b3-8eb0-edea9d4ebe53 1382520044 |
| المصدر المساهم: | UNIV OF COPENHAGEN From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1382520044 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |