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The ubiquity of supermassive black holes (SMBHs) at the centers of nearby luminous galaxies can arise from the multiple mergers experienced by dark matter halos in hierarchical structure formation models, even if only a small fraction of…

Astrophysics · Physics 2009-11-06 Kristen Menou , Zoltan Haiman , Vijay K. Narayanan

The role of mergers in the evolution of massive black holes is still unclear, and their dynamical evolution, from the formation of pairs to binaries and the final coalescence, carries large physical uncertainties. The identification of the…

Black hole mergers detectable with LIGO can occur in active galactic nucleus (AGN) disks. Here we parameterize the merger rates, the mass spectrum and the spin spectrum of black holes (BH) in AGN disks. The predicted merger rate spans $\sim…

High Energy Astrophysical Phenomena · Physics 2018-10-23 B. McKernan , K. E. S. Ford , J. Bellovary , N. W. C. Leigh , Z. Haiman , B. Kocsis , W. Lyra , M. -M. MacLow , B. Metzger , M. O'Dowd , S. Endlich , D. J. Rosen

The LIGO-Virgo-KAGRA (LVK) Collaboration has reported nearly 100 BH-BH mergers. The LVK provides estimates of rates, masses, effective spins, and redshifts for these mergers. Yet, the formation channel(s) of the mergers remains uncertain.…

High Energy Astrophysical Phenomena · Physics 2022-08-31 K. Belczynski , Z. Doctor , M. Zevin , A. Olejak , S. Banerjee , D. Chattopadhyay

We examine the luminosity function (LF) of [OII] emission-line galaxies in the high-resolution cosmological simulation MassiveBlack-II (MBII). From the spectral energy distribution of each galaxy, we select a sub-sample of star-forming…

Astrophysics of Galaxies · Physics 2015-09-30 KwangHo Park , Tiziana Di Matteo , Shirley Ho , Rupert Croft , Stephen M. Wilkins , Yu Feng , Nishikanta Khandai

One of the most exciting advances of the current generation of telescopes has been the detection of galaxies during the epoch of reionization, using deep fields that have pushed these instruments to their limits. It is essential to optimize…

Cosmology and Nongalactic Astrophysics · Physics 2022-08-31 A. C. Trapp , Steven R. Furlanetto

Massive black holes (MBHs), with masses in the range 10^3-10^8 Msolar, which merge with a companion black hole of similar mass are expected to be the most powerful source of gravitational radiation in the frequency range probed by LISA. MBH…

Astrophysics · Physics 2009-11-11 Marta Volonteri

We derive a non-parametric CO luminosity function using a FIR and an optical B-band selected sample of the galaxies included in the FCRAO Extragalactic CO Survey. The FIR selected sample is defined using the IRAS Bright Galaxy Surveys (BGS;…

Astrophysics · Physics 2009-11-07 Dusan Keres , Min S. Yun , J. S. Young

Astrophysical scenarios for the formation and evolution of intermediate-mass black holes (IMBHs) in the mass range $10^2 M_\odot \lesssim M \lesssim 10^6 M_\odot$ remain uncertain, but future ground-based gravitational-wave (GW)…

General Relativity and Quantum Cosmology · Physics 2024-11-12 Luca Reali , Roberto Cotesta , Andrea Antonelli , Konstantinos Kritos , Vladimir Strokov , Emanuele Berti

Euclid and the Roman Space Telescope (Roman) will soon use grism spectroscopy to detect millions of galaxies via H$\alpha$ and [O III] $\lambda 5007$ emission. To better constrain the expected galaxy counts from these instruments, we use a…

Astrophysics of Galaxies · Physics 2023-01-25 Gautam Nagaraj , Robin Ciardullo , William P. Bowman , Alex Lawson , Caryl Gronwall

Aims.Molecular masers, including methanol and hydroxyl masers, and in particular the ones in excited rotational states (ex-OHmasers), are one of the most informative tools for studying star-forming regions. So, the discovery, of new maser…

Astrophysics of Galaxies · Physics 2021-08-04 O. Patoka , O. Antyufeyev , I. Shmeld , V. Bezrukovs , M. Bleiders , A. Orbidans , A. Aberfelds , V. Shulga

Aims. The main goal of this paper is to derive observational constraints on the halo mass fuction (HMF) by performing a tomographic analysis of the magnification bias signal on a sample of background submillimeter galaxies. The results can…

Cosmology and Nongalactic Astrophysics · Physics 2022-06-15 M. M. Cueli , L. Bonavera , J. Gonzalez-Nuevo , D. Crespo , J. M. Casas , A. Lapi

Determinations of the UV luminosity function of AGN at high redshifts are important for constraining the AGN contribution to reionization and understanding the growth of supermassive black holes. Recent inferences of the luminosity function…

Astrophysics of Galaxies · Physics 2019-06-12 Girish Kulkarni , Gábor Worseck , Joseph F. Hennawi

Binary black hole (BBH) mergers found by the LIGO and Virgo detectors are of immense scientific interest to the astrophysics community, but are considered unlikely to be sources of electromagnetic emission. To test whether they have rapidly…

A significant fraction of galaxy clusters exhibits cluster wide radio halos. We give a simple prediction of the local and higher redshift radio halo luminosity function (RHLF) on the basis of (i) an observed and a theoretical X-ray cluster…

Astrophysics · Physics 2009-11-07 Torsten A. Ensslin , Huub Roettgering

Future observations of CMB anisotropies will be able to probe high multipole regions of the angular power spectrum, corresponding to a resolution of a few arcminutes. Dust emission from merging haloes is one of the foregrounds that will…

Astrophysics · Physics 2010-11-11 Mattia Righi , Carlos Hernandez-Monteagudo , Rashid Sunyaev

Molecules that trace the high-density regions of the interstellar medium have been observed in (ultra-)luminous (far-)infrared galaxies, in order to initiate multiple-molecule multiple-transition studies to evaluate the physical and…

Astrophysics · Physics 2009-11-13 W. A. Baan , C. Henkel , A. F. Loenen , A. Baudry , T. Wiklind

Prior to the detection of black holes (BHs) via the gravitational waves (GWs) they generate at merger, the presence of BHs was inferred in X-ray binaries, mostly via dynamical measurements, with masses in the range between $\sim…

High Energy Astrophysical Phenomena · Physics 2019-06-12 Rosalba Perna , Yi-Han Wang , Will M. Farr , Nathan Leigh , Matteo Cantiello

We use the catalogue of 4315 extragalactic HI 21-cm emission line detections from HIPASS to calculate the most accurate measurement of the HI mass function (HIMF) of galaxies to date. The completeness of the HIPASS sample is well…

Astrophysics · Physics 2009-11-10 M. A. Zwaan , M. J. Meyer , L. Staveley-Smith , R. L. Webster

The contribution of extragalactic objects with HI masses below $10^8 M_\odot$ to the HI mass function remains uncertain. Several aspects of the detection of low-mass sources in HI surveys are not always considered, and as a result different…

Astrophysics · Physics 2007-05-23 S. E. Schneider , J. L. Rosenberg