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By means of a multimass isotropic and spherical model that includes the self-consistent treatment of a central intermediate-mass black hole (IMBH), the influence of this black hole on the morphological and physical properties of globular…

Astrophysics · Physics 2008-11-26 P. Miocchi

Causal learning has garnered significant attention in recent years because it reveals the essential relationships that underpin phenomena and delineates the mechanisms by which the world evolves. Nevertheless, traditional causal learning…

Machine Learning · Computer Science 2024-07-31 Zizhen Deng , Xiaolong Zheng , Hu Tian , Daniel Dajun Zeng

Previous studies suggest that the growth of supermassive black holes (SMBHs) may be fundamentally related to host-galaxy stellar mass ($M_\star$). To investigate this SMBH growth-$M_\star$ relation in detail, we calculate long-term SMBH…

We investigate the scaling relations between the supermassive black holes mass (M_bh) and the host bulge mass in elliptical galaxies, classical bulges, and pseudo-bulges. We use two-dimensional image analysis software BUDDA to obtain the…

Astrophysics of Galaxies · Physics 2009-08-17 Jian Hu

A physical understanding of galaxy formation and evolution benefits from an understanding of the connections between galaxies, their host dark matter halos, and their environments. In particular, interactions with more-massive neighbors can…

Astrophysics of Galaxies · Physics 2025-10-01 Haley Bowden , Peter Behroozi

Discovering a unique causal structure is difficult due to both inherent identifiability issues, and the consequences of finite data. As such, uncertainty over causal structures, such as those obtained from a Bayesian posterior, are often…

Machine Learning · Computer Science 2025-03-06 Anish Dhir , Matthew Ashman , James Requeima , Mark van der Wilk

We propose a new systematic method of studying correlations between parameters that describe an astronomical (or any) physical system. We recall that behind Dimensionless scaling laws in complex, self-interacting physical objects lies a…

Astrophysics of Galaxies · Physics 2019-02-26 R. N. Henriksen , J. A. Irwin

We describe a hybrid evolutionary algorithm that can simultaneously search for multiple supermassive black hole binary (SMBHB) inspirals in LISA data. The algorithm mixes evolutionary computation, Metropolis-Hastings methods and Nested…

General Relativity and Quantum Cosmology · Physics 2010-02-03 Jonathan R. Gair , Edward K. Porter

We investigate the redshift evolution of the intrinsic alignments (IA) of galaxies in the \texttt{MassiveBlackII} (MBII) simulation. We select galaxy samples above fixed subhalo mass cuts ($M_h>10^{11,12,13}~M_{\odot}/h$) at $z=0.6$ and…

Cosmology and Nongalactic Astrophysics · Physics 2020-01-08 Aklant K Bhowmick , Yingzhang Chen , Ananth Tenneti , Tiziana Di Matteo , Rachel Mandelbaum

Supermassive black holes (SMBHs) are found in the centres of most galaxies. Their masses, and hence their gravitational potentials, are negligible compared with those of the host galaxy. However, several strong correlations between SMBH…

Astrophysics of Galaxies · Physics 2019-05-27 K. Zubovas , A. R. King

We measure the evolution of the $M_{\rm BH}-M_*$ relation using 584 uniformly-selected SDSS quasars at $0.2<z<0.8$. The black-hole masses ($M_{\rm BH}$) are derived from the single-epoch virial mass estimator using the H$\beta$ emission…

Observations of local galaxies harbouring supermassive black holes (BHs) of anomalously high mass, M_BH, relative to their stellar mass, M_star, appear to be at odds with simple models of the co-evolution between galaxies and their central…

Astrophysics of Galaxies · Physics 2016-05-18 Christopher Barber , Joop Schaye , Richard G. Bower , Robert A. Crain , Matthieu Schaller , Tom Theuns

Quasars are useful tracers of the cosmological evolution of the black hole mass - galaxy relation. We compare the expectations of Semi-Analytical Models (SAM) of galaxy evolution, to the largest available datasets of quasar host galaxies…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 L. Portinari , J. Kotilainen , R. Falomo , R. Decarli

The oral version of this paper summarized Kormendy & Ho 2013, ARA&A, 51, 511. However, earlier speakers at this Symposium worried that selection effects bias the derivation of black hole scaling relations. I therefore added -- and this…

Astrophysics of Galaxies · Physics 2020-05-20 John Kormendy

We discuss the importance of feedback via photoionization and Compton heating on the co-evolution of massive black holes (MBHs) at the center of spheroidal galaxies and their stellar and gaseous components. We first assess the energetics of…

Astrophysics · Physics 2009-11-10 S. Yu. Sazonov , J. P. Ostriker , L. Ciotti , R. A. Sunyaev

In a recent series of papers, supermassive black holes were used to discern pathways in galaxy evolution. By considering the black holes' coupling with their host galaxy's bulge/spheroid, the progression of mass within each component has…

Astrophysics of Galaxies · Physics 2025-01-20 Alister W. Graham

The possibility that the masses of supermassive black holes (SBHs) correlate with the total gravitational mass of their host galaxy, or the mass of the dark matter halo in which they presumably formed, is investigated using a sample of 16…

Astrophysics · Physics 2011-05-05 Laura Ferrarese

At cosmological distances, gravitational lensing can provide a direct measurement of supermassive black hole (SMBH) masses irrespective of their luminosities. Here, we directly estimate the mass of a SMBH in the brightest cluster galaxy…

Astrophysics of Galaxies · Physics 2018-08-21 Mandy C. Chen , Tom Broadhurst , Jeremy Lim , Jose M. Diego , Youichi Ohyama , Holland Ford , Narciso Benítez

Recent studies suggest that the quenching properties of galaxies are correlated over several mega-parsecs. The large-scale "galactic conformity" phenomenon around central galaxies has been regarded as a potential signature of "galaxy…

Astrophysics of Galaxies · Physics 2018-02-21 Ying Zu , Rachel Mandelbaum

This paper presents an analysis of the correlation between the number of globular clusters (N_GC) in giant galaxies and the mass of the galaxies' central supermassive black hole (M_SMBH). I construct a sample of 20 elliptical, spiral, and…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Katherine L. Rhode