Paving the way for the JWST: witnessing globular cluster formation at z > 3
Paving the way for the JWST: witnessing globular cluster formation at z > 3
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为 JWST 铺平道路:见证 z > 3 处球状星团的形成
DOI:
10.1093/mnras/stx351
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发表时间:
2017
影响因子:
4.8
通讯作者:
Cristiani
中科院分区:
文献类型:
--
作者:
Vanzella;Calura;Meneghetti;Mercurio;Castellano;Caminha;Balestra;Rosati;De Barros;Grazian;D'Ercole;Ciotti;Caputi;Grillo;Merlin;Pentericci;Fontana;Cristiani
We report on five compact, extremely young (<10 Myr) and blue (βUV< −2.5,Fλ= λβ) objects observed with VLT/Multi Unit Spectroscopic Explorer at redshifts 3.1169 and 3.235, in addition to three objects atz= 6.145. These sources are strongly magnified (3–40 times) by the Hubble Frontier Field galaxy clusters MACS J0416 and AS1063. Their delensed half-light radii (Re) are between 16 and 140 pc, the stellar masses are ≃1–20 × 106M⊙, the magnitudes aremUV= 28.8–31.4 (−17 <MUV< −15) and specific star formation rates can be as large as ∼800 Gyr−1. Remarkably, the inferred physical properties of two objects are similar to those expected in some globular cluster formation scenarios, representing the best candidate proto-GCs discovered so far. Rest-frame optical high-dispersion spectroscopy of one of them atz= 3.1169 yields a velocity dispersion σv≃ 20 km s−1, implying a dynamical mass dominated by the stellar mass. Another object atz= 6.145, with delensedMUV≃ −15.3 (mUV≃ 31.4), shows a stellar mass and a star formation rate surface density consistent with the values expected from popular GC formation scenarios. An additional star-forming region atz= 6.145, with delensedmUV≃ 32, a stellar mass of 0.5 × 106M⊙and a star formation rate of 0.06 M⊙yr−1is also identified. These objects currently represent the faintest spectroscopically confirmed star-forming systems atz> 3, elusive even in the deepest blank fields. We discuss how proto-GCs might contribute to the ionization budget of the Universe and augment Lyα visibility during reionization. This work underlines the crucial role ofJWSTin characterizing the rest-frame optical and near-infrared properties of such low-luminosity high-zobjects.
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DOI:
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发表时间:
2010
期刊:
影响因子:
--
作者:
B. Siana;H. Teplitz;H. Ferguson;T. Brown;M. Giavalisco;M. Dickinson;R. Chary;D. D. de Mello;C. Conselice;C. Bridge;J. Gardner;J. Colbert;C. Scarlata
通讯作者:
C. Scarlata
DOI:
10.1088/0004-637x/791/1/17
发表时间:
2014-06
期刊:
The Astrophysical Journal
影响因子:
--
作者:
M. Maseda;A. van der Wel;H. Rix;E. da Cunha;C. Pacifici;I. Momcheva;G. Brammer;S. Meidt;M. Franx;P. V. van Dokkum;M. Fumagalli;E. Bell;H. Ferguson;N. Förster-Schreiber;A. Koekemoer;D. Koo;B. Lundgren;D. Marchesini;E. Nelson;S. Patel;R. Skelton;A. Straughn;J. Trump;K. Whitaker
通讯作者:
M. Maseda;A. van der Wel;H. Rix;E. da Cunha;C. Pacifici;I. Momcheva;G. Brammer;S. Meidt;M. Franx;P. V. van Dokkum;M. Fumagalli;E. Bell;H. Ferguson;N. Förster-Schreiber;A. Koekemoer;D. Koo;B. Lundgren;D. Marchesini;E. Nelson;S. Patel;R. Skelton;A. Straughn;J. Trump;K. Whitaker
DOI:
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发表时间:
2002
期刊:
影响因子:
--
作者:
M. Ricotti
通讯作者:
M. Ricotti
影响因子:
6.5
作者:
M. Castellano;V. Sommariva;A. Fontana;L. Pentericci;P. Santini;A. Grazian;R. Amorín;J. Donley;J. Dunlop;H. Ferguson;F. Fiore;A. Galametz;E. Giallongo;Yicheng Guo;Kuang;A. Koekemoer;R. Maiolino;R. McLure;D. Paris;D. Schaerer;P. Troncoso;E. Vanzella
通讯作者:
E. Vanzella
DOI:
10.3847/1538-4357/834/1/40
发表时间:
2016
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Corey S. Howard;R. Pudritz;R. Klessen
通讯作者:
R. Klessen