Paper Preview

In this page I present some of my newly published papers, as they become public.


CONDITIONS FOR OPTIMAL GROWTH OF BLACK HOLE SEEDS
by Fabio Pacucci, Priyamvada Natarajan, Marta Volonteri, Nico Cappelluti, C. Megan Urry
Accepted for publication in ApJ Letters: arXiv pre-print
growth, super-super-, IMF, high-efficiency, inefficient accretors, efficient accretors

 

In a few words:
Super-massive black holes are  observed very early in the Universe. The general consensus is that these black holes were very lucky to grow up so rapidly. But, exactly, how can a black hole be “lucky”? We present a theoretical framework to calculate the probability that a black hole seed grows very quickly. We predict the existence of a high-z population of undetected black holes, accreting very inefficiently. These objects might be visible only through gravitational waves.abstract, paper, optimal conditions, growth, black hole seeds


GRAVITATIONAL WAVE SOURCES FROM POP III STARS ARE
PREFERENTIALLY LOCATED WITHIN THE CORES OF THEIR HOST GALAXIES

by Fabio Pacucci, Abraham Loeb, Stefania Salvadori
Accepted for Publication in MNRAS Letters: arXiv pre-print

 

In a few words:
The detection of gravitational waves has opened up a new observational window into the Universe. The merging of high-mass binary black holes is thus far the preferred way to generate these events. If these binary black holes are remnants of Pop III stars, the first generation of stars, then they are preferentially located within the cores of their host galaxies. abstract, pop III, gravitational waves


THE NATURE OF THE LYMAN ALPHA EMITTER CR7: A PERSISTING PUZZLE
by Fabio Pacucci, Andrea Pallottini, Andrea Ferrara, Simona Gallerani
Accepted for Publication in MNRAS Letters: arXiv pre-print

CR7, spectrum, photometry, black hole, Pop III

 

In a few words:
CR7 is a far away galaxy at redshift 6.6. What powers its peculiar emission? A burst of primordial stars, or an ancient black hole? Or is it just a normal AGN, transitioning from its childhood to its mature phase? We fit the current photometry of CR7 (to within 1 sigma)  with a direct collapse black hole model,  discussing on alternatives. abstract


FEEDBACK LIMITS TO MAXIMUM SEED MASSES OF BLACK HOLES
by Fabio Pacucci, Priyamvada Natarajan, Andrea Ferrara
Accepted for Publication in ApJ Letters: arXiv pre-print

 

 

In a few words:
What is the maximum mass that a black hole seed can reach without interacting with other similar objects? How does this depend on the properties of its host galaxy?  If a black hole has (almost) never interacted in the history of the Universe, how should it appear now in the local Universe? We provide a first answer to these questions, using simple dynamical arguments.abstract, apj letters, apj, black holes


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