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Titans of the Early Universe: The Prato Statement on the Origin of the First Supermassive Black Holes
Tyrone E. Woods, Bhaskar Agarwal, Volker Bromm +30
In recent years, the discovery of massive quasars at z~7 has provided a striking challenge to our understanding of the origin and growth of supermassive black holes in the early Un…
Production of atomic hydrogen by cosmic rays in dark clouds
Marco Padovani, Daniele Galli, Alexei V. Ivlev +2
The presence of small amounts of atomic hydrogen, detected as absorption dips in the 21 cm line spectrum, is a well-known characteristic of dark clouds. The abundance of hydrogen a…
Witnessing galaxy assembly at the edge of the reionization epoch
V. D'Odorico, C. Feruglio, A. Ferrara +8
We report the discovery of Serenity-18, a galaxy at z=5.939 for which we could measure the content of molecular gas, M(H_2)~ 5 x10^9 M_sun, traced by the CO(6-5) emission, together…
Spectroscopic investigation of a reionized galaxy overdensity at z=7
M. Castellano, L. Pentericci, E. Vanzella +17
We present deep spectroscopic follow-up observations of the Bremer Deep Field (BDF) where the two 7 bright Ly emitters (LAE) BDF521 and BDF3299 were previously discovered…
Growth problems of stellar black holes in early galaxies
Maria Carmela Orofino, Andrea Ferrara, Simona Gallerani
The nature of the seeds of the observed high-z super-massive black holes (SMBH) is unknown. Although different options have been proposed, involving e.g. intermediate mass direct c…
The dense molecular gas in the QSO SDSS J231038.88+185519.7 resolved by ALMA
C. Feruglio, F. Fiore, S. Carniani +13
We present ALMA observations of the CO(6-5) and [CII] emission lines and the sub-millimeter continuum of the quasi-stellar object (QSO) SDSS J231038.88+185519.7. Compared…