The Megamaser Cosmology Project. XI. A Geometric Distance to CGCG 074-064

Pesce, Dominic W.; Braatz, J. A.; Reid, M. J.; Condon, J. J.; Gao, F.; Henkel, C.; Kuo, C. Y.; Lo, K. Y.; Zhao, Wei

doi:10.3847/1538-4357/ab6bcd

Cited by 26 publications

(18 citation statements)

References 41 publications

(41 reference statements)

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“…For NGC 2273, NGC 2960, NGC 4388, NGC 6264 and NGC 6323 we use the data taken from 2005 to 2009 with the VLBA, GBT, and ET reported in Kuo et al (2011); for UGC 3789 we use data obtained from 2006 to 2009 by the VLBA, GBT and ET in Reid et al (2013); for NGC 5765b we use data from 2012 to 2014 with the VLBA, GBT, ET and VLA in Gao et al (2015); for ESO 558-G009 and J0437+2456 the data from 2010 to 2014 with VLBA, GBT, ET and VLA reported in Gao et al (2016); and for CGCG 074-064 data from 2015 to 2017 with VLBA, GBT and ET in Pesce et al (2020).…”

Section: Observational Data and Previous Estimatesmentioning

confidence: 99%

A general relativistic mass-to-distance ratio for a set of megamaser AGN black holes

Villaraos¹,

Gonzalez-Juarez²,

Lizardo-Castro³

et al. 2022

Preprint

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In this work we perform a Bayesian statistical fit to estimate the mass-to-distance ratio and the recessional redshift of 10 different black holes hosted at the centre of active galactic nuclei, namely the galaxies NGC 5765b, NGC 6323, UGC 3789, CGCG 074-064, ESO 558-G009, NGC 2960, NGC 6264, NGC 4388, J0437+2456 and NGC 2273. Our general relativistic method makes use of the positions in the sky and frequency shift observations of water megamasers circularly orbiting the central black hole on their accretion disks. This approach also allows us to quantify the gravitational redshift which is not considered in a Newtonian analysis. The gravitational redshift of the megamasers closest to the black hole is found to be within the range 1-8 km/s. The order of the fitted black hole masses corresponds to supermassive black holes and lies on the range 10 6 − 10 7 𝑀 .

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Section: Observational Data and Previous Estimatesmentioning

confidence: 99%

A general relativistic mass-to-distance ratio for a set of megamaser AGN black holes

Villaraos¹,

Gonzalez-Juarez²,

Lizardo-Castro³

et al. 2022

Preprint

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“…For the present analysis we employ a modified version of the maser disk model described in Pesce et al (2020) to fit the J0437+2456 VLBI data. The primary modification is the removal of acceleration measurements from the model likelihood, as the available VLBI dataset does not contain any such acceleration measurements.…”

Section: The Velocity Of the Smbhmentioning

confidence: 99%

“…Detailed descriptions of the model parameters, likelihood, and fitting procedure are provided in Pesce et al (2020). Following G17, we fit only to the redshifted and blueshifted maser features because there are no available acceleration measurements to constrain the systemic maser feature orbital radii.…”

Section: The Velocity Of the Smbhmentioning

confidence: 99%

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A restless supermassive black hole in the galaxy J0437+2456

Pesce,

Seth,

Greene

et al. 2021

Preprint

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We present the results from an observing campaign to confirm the peculiar motion of the supermassive black hole (SMBH) in J0437+2456 first reported in Pesce et al. (2018). Deep observations with the Arecibo Observatory have yielded a detection of neutral hydrogen (Hi) emission, from which we measure a recession velocity of 4910 km s −1 for the galaxy as a whole. We have also obtained near-infrared integral field spectroscopic observations of the galactic nucleus with the Gemini North telescope, yielding spatially resolved stellar and gas kinematics with a central velocity at the innermost radii (0.1 ≈ 34 pc) of 4860 km s −1 . Both measurements differ significantly from the ∼4810 km s −1 H 2 O megamaser velocity of the SMBH, supporting the prior indications of a velocity offset between the SMBH and its host galaxy. However, the two measurements also differ significantly from one another, and the galaxy as a whole exhibits a complex velocity structure that implies the system has recently been dynamically disturbed. These results make it clear that the SMBH is not at rest with respect to the systemic velocity of the galaxy, though the specific nature of the mobile SMBH -i.e., whether it traces an ongoing galaxy merger, a binary black hole system, or a gravitational wave recoil eventremains unclear.

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“…Megamasing disks around AGN are also famously well described by thin, Keplerian molecular gas disks, but may also contain warped disks (Zhao et al 2018;Pesce et al 2020). These warps are similarly motivated by perturbed galactic potentials, but they could also arise from a dynamic, and small, radial velocity component that changes with radius.…”

Section: Applicability To Other Gas Dynamics Techniquesmentioning

confidence: 99%

Reconciling EHT and Gas Dynamics Measurements in M87: Is the Jet Misaligned at Parsec Scales?

Jeter,

Broderick

2020

Preprint

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The Event Horizon Telescope mass estimate for M87* is consistent with the stellar dynamics mass estimate, and inconsistent with the gas dynamics mass estimates by up to 2σ. We have previously explored a new gas dynamics model that incorporated sub-Keplerian gas velocities that could in principle explain the discrepancy in the stellar and gas dynamics mass estimate. In this paper, we extend this gas dynamical model to also include non-trivial disk heights, which may also resolve the mass discrepancy independent of sub-Keplerian velocity components. By combining the existing velocity measurements and the EHT mass estimate, we place constraints on the gas disk inclination and sub-Kelplerian fraction. These constraints require the parsec-scale ionized gas disk be misaligned with the milli-arcsecond radio jet by at least 11 • , and more typically 27 • . Modifications to the gas dynamics model either by introducing sub-Keplerian velocities or thick disks produces further misalignment with the radio jet. If the jet is produced in a Blandford-Znajek-type process, the angular momentum of the black hole is decoupled with the angular momentum of the large scale gas feeding M87*.

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The Megamaser Cosmology Project. XI. A Geometric Distance to CGCG 074-064

Cited by 26 publications

References 41 publications

A general relativistic mass-to-distance ratio for a set of megamaser AGN black holes

A general relativistic mass-to-distance ratio for a set of megamaser AGN black holes

A restless supermassive black hole in the galaxy J0437+2456

Reconciling EHT and Gas Dynamics Measurements in M87: Is the Jet Misaligned at Parsec Scales?

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