WFRF:(Annibali V.)
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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 04872naa a2200745 4500 | |
| 001 | oai:DiVA.org:su-225390 | |
| 003 | SwePub | |
| 008 | 240118s2023 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-2253902 URI |
| 024 | 7 | a https://doi.org/10.1051/0004-6361/2023469812 DOI |
| 040 | a (SwePub)su | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Vanzella, E.4 aut |
| 245 | 1 0 | a An extremely metal-poor star complex in the reionization era :b Approaching Population III stars with JWST |
| 264 | 1 | c 2023 |
| 338 | a print2 rdacarrier | |
| 520 | a We present JWST/Near Infrared Spectrograph (NIRSpec) integral field spectroscopy (IFS) of a lensed Population III candidate stellar complex (dubbed Lensed And Pristine 1, LAP1), with a lensing-corrected stellar mass of ≲104 M⊙ and an absolute luminosity of MUV > −11.2 (mUV > 35.6), confirmed at redshift 6.639 ± 0.004. The system is strongly amplified (μ ≳ 100) by straddling a critical line of the Hubble Frontier Field galaxy cluster MACS J0416. Although the stellar continuum is currently not detected in the Hubble and JWST/Near Infrared Camera (NIRCam) and Near Infrared Imager and Slitless Spectrograph (NIRISS) imaging, arclet-like shapes of Lyman and Balmer lines, Lyα, Hγ, Hβ and Hα are detected with NIRSpec IFS with signal-to-noise ratios (S/N) of approximately 5 − 13 and large equivalent widths (> 300 − 2000 Å), along with a remarkably weak [O III]λλ4959, 5007 at S/N ≃ 4. LAP1 shows a large ionizing photon production efficiency, log(ξion[erg Hz−1]) > 26. From the metallicity indexes R23 = ([O III] + [O II])/Hβ ≲ 0.74 and R3 = ([O III]/Hβ) = 0.55 ± 0.14, we derive an oxygen abundance of 12 + log(O/H)≲6.3. Intriguingly, the Hα emission is also measured in mirrored subcomponents where no [O III] is detected, providing even more stringent upper limits on the metallicity if in situ star formation is ongoing in this region (12 + log(O/H) < 6). The formal stellar mass limit of the subcomponents would correspond to ∼103 M⊙ or MUV fainter than −10. Alternatively, this metal-free, pure line-emitting region could be the first case of a fluorescing H I gas region induced by transverse escaping ionizing radiation from a nearby star complex. The presence of large equivalent-width hydrogen lines and the deficiency of metal lines in such a small region make LAP1 the most metal-poor star-forming region currently known in the reionization era and a promising site that may host isolated, pristine stars. | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 653 | a stars: Population III | |
| 653 | a galaxies: high-redshift | |
| 653 | a galaxies: star formation | |
| 653 | a gravitational lensing: strong | |
| 700 | 1 | a Loiacono, F.4 aut |
| 700 | 1 | a Bergamini, P.4 aut |
| 700 | 1 | a Meštrić, U.4 aut |
| 700 | 1 | a Castellano, M.4 aut |
| 700 | 1 | a Rosati, P.4 aut |
| 700 | 1 | a Meneghetti, M.4 aut |
| 700 | 1 | a Grillo, C.4 aut |
| 700 | 1 | a Calura, F.4 aut |
| 700 | 1 | a Mignoli, M.4 aut |
| 700 | 1 | a Bradač, M.4 aut |
| 700 | 1 | a Adamo, Angela,d 1981-u Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)anad2127 |
| 700 | 1 | a Rihtaršič, G.4 aut |
| 700 | 1 | a Dickinson, M.4 aut |
| 700 | 1 | a Gronke, M.4 aut |
| 700 | 1 | a Zanella, A.4 aut |
| 700 | 1 | a Annibali, F.4 aut |
| 700 | 1 | a Willott, C.4 aut |
| 700 | 1 | a Messa, Matteo,d 1988-u Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Université de Genève, Switzerland4 aut0 (Swepub:su)mame4466 |
| 700 | 1 | a Sani, E.4 aut |
| 700 | 1 | a Acebron, A.4 aut |
| 700 | 1 | a Bolamperti, A.4 aut |
| 700 | 1 | a Comastri, A.4 aut |
| 700 | 1 | a Gilli, R.4 aut |
| 700 | 1 | a Caputi, K. I.4 aut |
| 700 | 1 | a Ricotti, M.4 aut |
| 700 | 1 | a Gruppioni, C.4 aut |
| 700 | 1 | a Ravindranath, S.4 aut |
| 700 | 1 | a Mercurio, A.4 aut |
| 700 | 1 | a Strait, V.4 aut |
| 700 | 1 | a Martis, N.4 aut |
| 700 | 1 | a Pascale, R.4 aut |
| 700 | 1 | a Caminha, G. B.4 aut |
| 700 | 1 | a Annunziatella, M.4 aut |
| 700 | 1 | a Nonino, M.4 aut |
| 710 | 2 | a Stockholms universitetb Institutionen för astronomi4 org |
| 773 | 0 | t Astronomy and Astrophysicsg 678q 678x 0004-6361x 1432-0746 |
| 856 | 4 | u https://doi.org/10.1051/0004-6361/202346981y Fulltext |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-225390 |
| 856 | 4 8 | u https://doi.org/10.1051/0004-6361/202346981 |
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