An updated comparison of the $M_{\bullet}$ vs $M_{G}\sigma ^{2}$ relation with $M_{\bullet}$ vs $\sigma$ and the problem of the masses of galaxies

Iannella, Antonella Lucia; Feoli, A.

doi:10.1007/s10509-020-03875-6

Cited by 4 publications

(11 citation statements)

References 37 publications

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“…To be precise, both the response and the covariate are on a logarithmic scale. The results are based on R routines and codes, whereas in Iannella and Feoli (2020) the OLS fit was obtained from Mathematica and other fits were obtained from the LINMIX ERR (Kelly 2007) and MP-FITEXY (Tremaine et al 2002) routines. The latter techniques have not been considered here, but prediction accuracy could have been evaluated by leave-oneout cross-validation as well.…”

Section: Fitted Scaling Relations: Empirical Resultsmentioning

confidence: 99%

Section: Samplesmentioning

confidence: 98%

“…The analyses concern the five samples from Iannella and Feoli (2020) and one more sample collected in Kormendy and Ho (2013). The results regarding the first five samples are expected to improve over the findings from Feoli and Mele (2005) and Iannella and Feoli (2020). In contrasts, the last sample has not been studied yet, because we planned to include it in an upcoming work related to the role of pseudobulges.…”

Section: Samplesmentioning

confidence: 99%

“…Furthermore, it has already shown to predict the masses of SMBH better than other relations in some particular cases (Benedetto et al 2013). In this paper, the objective is to analyze the predictive power of the scaling relation between the mass of a SMBH and kinetic energy and to enhance the statistical analyses in Iannella and Feoli (2020). Then, we will follow two main paths of investigation:…”

Section: Introductionmentioning

confidence: 99%

“…The analysis refers to six samples, that are listed in Sect. 2: five samples have been already considered in Iannella and Feoli (2020) and one comes from Kormendy and Ho (2013). The results about goodness of fit and prediction accuracy of the scaling relations are presented and discussed in Sect.…”

Section: Introductionmentioning

confidence: 99%

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A note on the interpretation of the statistical analysis of the $M_{\bullet}-M_{G}\sigma ^{2}$ scaling relation

Iannella

Greco

Feoli

2021

Astrophys Space Sci

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In the context of scaling relations between Supermassive Black Holes and host-galaxy properties, we aim to enhance the comparison between M • −M G σ 2 and M • − σ relations from a statistical point of view. First, it is suggested to take into account the predictive accuracy of the scaling relation, in addition to the classical measures of goodness of fit. Here, prediction accuracy is fairly evaluated according to a leave-one-out cross-validation strategy. Then, we spread more light on the analysis of residuals from the fitted scaling relation, in order to provide more useful information on the role played by the different variables in their correlation with the black hole mass. The findings from six samples are discussed.

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Section: Fitted Scaling Relations: Empirical Resultsmentioning

confidence: 99%

Section: Samplesmentioning

confidence: 98%

Section: Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A note on the interpretation of the statistical analysis of the $M_{\bullet}-M_{G}\sigma ^{2}$ scaling relation

Iannella

Greco

Feoli

2021

Astrophys Space Sci

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The weak dependence of velocity dispersion on disc fractions, mass-to-light ratio, and redshift: implications for galaxy and black hole evolution

Marsden

Shankar

Bernardi

et al. 2021

Monthly Notices of the Royal Astronomical Society

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Velocity dispersion (σ) is a key driver for galaxy structure and evolution. We here present a comprehensive semi-empirical approach to compute σ via detailed Jeans modelling assuming both a constant and scale-dependent mass-to-light ratio M*/L. We compare with a large sample of local galaxies from MaNGA and find that both models can reproduce the Faber-Jackson (FJ) relation and the weak dependence of σ on bulge-to-total ratio B/T (for B/T ≳ 0.25). The dynamical-to-stellar mass ratio within R ≲ Re can be fully accounted for by a gradient in M*/L. We then build velocity dispersion evolutionary tracks σap[M*, z] (within an aperture) along the main progenitor dark matter haloes assigning stellar masses, effective radii and Sérsic indices via a variety of abundance matching and empirically motivated relations. We find: 1) clear evidence for downsizing in σap[M*, z] along the progenitor tracks; 2) at fixed stellar mass σ∝(1 + z)0.2 − 0.3 depending on the presence or not of a gradient in M*/L. We extract σap[M*, z] from the TNG50 hydrodynamic simulation and find very similar results to our models with constant M*/L. The increasing dark matter fraction within Re tends to flatten the σap[M*, z] along the progenitors at z ≳ 1 in constant M*/L models, while σap[M*, z] have a steeper evolution in the presence of a stellar gradient. We then show that a combination of mergers and gas accretion are likely responsible for the constant or increasing σap[M*, z] with time. Finally, our σap[M*, z] are consistent with a nearly constant and steep Mbh − σ relation at z ≲ 2, with black hole masses derived from the LX − M* relation.

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Some Predictions of Scaling Relations: The Case of the Black Hole in M87

Iannella

Feoli

2023

RMxAA

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In the context of supermassive black holes and their host galaxies, we consider two scaling relations: M• - Reσ3 and M• - MGσ2, to derive three fundamental parameters for the supermassive black hole at the center of M87. In this paper we will get predictions for the efficiency and mass of the black hole, and the temperature of its accretion disk, by comparing them with the respective experimental values.

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An updated comparison of the $M_{\bullet}$ vs $M_{G}\sigma ^{2}$ relation with $M_{\bullet}$ vs $\sigma$ and the problem of the masses of galaxies

Cited by 4 publications

References 37 publications

A note on the interpretation of the statistical analysis of the $M_{\bullet}-M_{G}\sigma ^{2}$ scaling relation

A note on the interpretation of the statistical analysis of the $M_{\bullet}-M_{G}\sigma ^{2}$ scaling relation

The weak dependence of velocity dispersion on disc fractions, mass-to-light ratio, and redshift: implications for galaxy and black hole evolution

Some Predictions of Scaling Relations: The Case of the Black Hole in M87

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