The MAVERIC Survey: Still No Evidence for Accreting Intermediate-mass Black Holes in Globular Clusters

Evangelia Tremou; Jay Strader; Laura Chomiuk; Laura Shishkovsky; Thomas J. MacCarone; James C.A. Miller-Jones; Vlad Tudor; Craig O. Heinke; Gregory R. Sivakoff; Anil C. Seth; Eva Noyola

doi:10.3847/1538-4357/aac9b9

The MAVERIC Survey: Still No Evidence for Accreting Intermediate-mass Black Holes in Globular Clusters

Evangelia Tremou, Jay Strader, Laura Chomiuk, Laura Shishkovsky, Thomas J. MacCarone, James C.A. Miller-Jones, Vlad Tudor, Craig O. Heinke, Gregory R. Sivakoff, Anil C. Seth, Eva Noyola

Physics

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81 Scopus citations

Abstract

We present the results of an ultradeep, comprehensive radio continuum survey for the accretion signatures of intermediate-mass black holes (IMBHs) in globular clusters (GCs). The sample, imaged with the Karl G. Jansky Very Large Array and the Australia Telescope Compact Array, comprises 50 Galactic GCs. No compelling evidence for an IMBH is found in any cluster in our sample. In order to achieve the highest sensitivity to low-level emission, we also present the results of an overall stack of our sample as well as various subsamples, also finding nondetections. These results strengthen the idea that IMBHs with masses 1000M _o are rare or absent in GCs.

Original language	English
Article number	16
Journal	Astrophysical Journal
Volume	862
Issue number	1
DOIs	https://doi.org/10.3847/1538-4357/aac9b9
State	Published - Jul 20 2018

Keywords

black hole physics
globular clusters: general
radio continuum: general

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10.3847/1538-4357/aac9b9

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title = "The MAVERIC Survey: Still No Evidence for Accreting Intermediate-mass Black Holes in Globular Clusters",

abstract = "We present the results of an ultradeep, comprehensive radio continuum survey for the accretion signatures of intermediate-mass black holes (IMBHs) in globular clusters (GCs). The sample, imaged with the Karl G. Jansky Very Large Array and the Australia Telescope Compact Array, comprises 50 Galactic GCs. No compelling evidence for an IMBH is found in any cluster in our sample. In order to achieve the highest sensitivity to low-level emission, we also present the results of an overall stack of our sample as well as various subsamples, also finding nondetections. These results strengthen the idea that IMBHs with masses 1000M o are rare or absent in GCs.",

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T2 - Still No Evidence for Accreting Intermediate-mass Black Holes in Globular Clusters

AU - Tremou, Evangelia

AU - Strader, Jay

AU - Chomiuk, Laura

AU - Shishkovsky, Laura

AU - MacCarone, Thomas J.

AU - Miller-Jones, James C.A.

AU - Tudor, Vlad

AU - Heinke, Craig O.

AU - Sivakoff, Gregory R.

AU - Seth, Anil C.

AU - Noyola, Eva

PY - 2018/7/20

Y1 - 2018/7/20

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AB - We present the results of an ultradeep, comprehensive radio continuum survey for the accretion signatures of intermediate-mass black holes (IMBHs) in globular clusters (GCs). The sample, imaged with the Karl G. Jansky Very Large Array and the Australia Telescope Compact Array, comprises 50 Galactic GCs. No compelling evidence for an IMBH is found in any cluster in our sample. In order to achieve the highest sensitivity to low-level emission, we also present the results of an overall stack of our sample as well as various subsamples, also finding nondetections. These results strengthen the idea that IMBHs with masses 1000M o are rare or absent in GCs.

KW - black hole physics

KW - globular clusters: general

KW - radio continuum: general

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The MAVERIC Survey: Still No Evidence for Accreting Intermediate-mass Black Holes in Globular Clusters

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Keywords

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