Academic Journal
Candidate Population III stellar complex at z = 6.629 in the MUSE Deep Lensed Field
| العنوان: | Candidate Population III stellar complex at z = 6.629 in the MUSE Deep Lensed Field |
|---|---|
| المؤلفون: | E Vanzella, M Meneghetti, G B Caminha, M Castellano, F Calura, P Rosati, C Grillo, M Dijkstra, M Gronke, E Sani, A Mercurio, P Tozzi, M Nonino, S Cristiani, M Mignoli, L Pentericci, R Gilli, T Treu, K Caputi, G Cupani, A Fontana, A Grazian, I Balestra |
| المساهمون: | E. Vanzella, M. Meneghetti, G. B Caminha, M. Castellano, F. Calura, P. Rosati, C. Grillo, M. Dijkstra, M. Gronke, E. Sani, A. Mercurio, P. Tozzi, M. Nonino, S. Cristiani, M. Mignoli, L. Pentericci, R. Gilli, T. Treu, K. Caputi, G. Cupani, A. Fontana, A. Grazian, I. Balestra |
| بيانات النشر: | Oxford University Press : Royal Astronomical Society |
| سنة النشر: | 2020 |
| المجموعة: | The University of Milan: Archivio Istituzionale della Ricerca (AIR) |
| مصطلحات موضوعية: | Galaxies: formation, Galaxies: starburst, Gravitational lensing: strong, Settore FIS/05 - Astronomia e Astrofisica |
| الوصف: | We discovered a strongly lensed (μ ≳ 40) Ly α emission at z = 6.629 (S/N ≃ 18) in the MUSE Deep Lensed Field (MDLF) targeting the Hubble Frontier Field (HFF) galaxy cluster MACS J0416. Dedicated lensing simulations imply that the Ly α emitting region necessarily crosses the caustic. The arc-like shape of the Ly α extends 3 arcsec on the observed plane and is the result of two merged multiple images, each one with a de-lensed Ly α luminosity L ≲ 2.8 × 1040 erg s−1 arising from a confined region (≲150 pc effective radius). A spatially unresolved Hubble Space Telescope (HST) counterpart is barely detected at S/N ≃ 2 after stacking the near-infrared bands, corresponding to an observed (intrinsic) magnitude m1500 ≳ 30.8 (≳35.0). The inferred rest-frame Ly α equivalent width is EW0 > 1120 Å if the IGM transmission is TIGM < 0.5. The low luminosities and the extremely large Ly α EW0 match the case of a Population III (Pop III) star complex made of several dozens stars (∼104 M☉) that irradiate an H II region crossing the caustic. While the Ly α and stellar continuum are among the faintest ever observed at this redshift, the continuum and the Ly α emissions could be affected by differential magnification, possibly biasing the EW0 estimate. The aforementioned tentative HST detection tends to favour a large EW0, making such a faint Pop III candidate a key target for the James Webb Space Telescope and Extremely Large Telescopes. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/wos/WOS:000539099000016; volume:494; issue:1; firstpage:L81; lastpage:L85; numberofpages:5; journal:MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. LETTERS; http://hdl.handle.net/2434/790151; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85098986373 |
| DOI: | 10.1093/mnrasl/slaa041 |
| الاتاحة: | http://hdl.handle.net/2434/790151 https://doi.org/10.1093/mnrasl/slaa041 |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.E155951 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1093/mnrasl/slaa041 |
|---|