No evidence for intermediate-mass black holes in globular clusters: Strong constraints from the JVLA
With a goal of searching for accreting intermediate-mass black holes (IMBHs), we report the results of ultra-deep Jansky Very Large Array radio continuum observations of the cores of three Galactic globular clusters: M15, M19, and M22. We reach rms noise levels of 1.5–2.1 μJy beam−1 at an average f...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
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Institute of Physics Publishing Ltd.
2012
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/43068 |
| _version_ | 1848756588568903680 |
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| author | Strader, J. Chomiuk, L. Maccarone, T. Miller-Jones, James Seth, A. Heinke, C Sivakoff, G. |
| author_facet | Strader, J. Chomiuk, L. Maccarone, T. Miller-Jones, James Seth, A. Heinke, C Sivakoff, G. |
| author_sort | Strader, J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | With a goal of searching for accreting intermediate-mass black holes (IMBHs), we report the results of ultra-deep Jansky Very Large Array radio continuum observations of the cores of three Galactic globular clusters: M15, M19, and M22. We reach rms noise levels of 1.5–2.1 μJy beam−1 at an average frequency of 6 GHz. No sources are observed at the center of any of the clusters. For a conservative set of assumptions about the properties of the accretion, we set 3σ upper limits on IMBHs from 360 to 980 M☉ . These limits are among the most stringent obtained for any globular cluster. They add to a growing body of work that suggests either (1) IMBHs >~ 1000 M☉ are rare in globular clusters or (2) when present, IMBHs accrete in an extraordinarily inefficient manner. |
| first_indexed | 2025-11-14T09:14:35Z |
| format | Journal Article |
| id | curtin-20.500.11937-43068 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:14:35Z |
| publishDate | 2012 |
| publisher | Institute of Physics Publishing Ltd. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-430682023-02-22T06:24:24Z No evidence for intermediate-mass black holes in globular clusters: Strong constraints from the JVLA Strader, J. Chomiuk, L. Maccarone, T. Miller-Jones, James Seth, A. Heinke, C Sivakoff, G. general-radio continuum: general black hole physics-globular clusters With a goal of searching for accreting intermediate-mass black holes (IMBHs), we report the results of ultra-deep Jansky Very Large Array radio continuum observations of the cores of three Galactic globular clusters: M15, M19, and M22. We reach rms noise levels of 1.5–2.1 μJy beam−1 at an average frequency of 6 GHz. No sources are observed at the center of any of the clusters. For a conservative set of assumptions about the properties of the accretion, we set 3σ upper limits on IMBHs from 360 to 980 M☉ . These limits are among the most stringent obtained for any globular cluster. They add to a growing body of work that suggests either (1) IMBHs >~ 1000 M☉ are rare in globular clusters or (2) when present, IMBHs accrete in an extraordinarily inefficient manner. 2012 Journal Article http://hdl.handle.net/20.500.11937/43068 10.1088/2041-8205/750/2/L27 Institute of Physics Publishing Ltd. unknown |
| spellingShingle | general-radio continuum: general black hole physics-globular clusters Strader, J. Chomiuk, L. Maccarone, T. Miller-Jones, James Seth, A. Heinke, C Sivakoff, G. No evidence for intermediate-mass black holes in globular clusters: Strong constraints from the JVLA |
| title | No evidence for intermediate-mass black holes in globular clusters: Strong constraints from the JVLA |
| title_full | No evidence for intermediate-mass black holes in globular clusters: Strong constraints from the JVLA |
| title_fullStr | No evidence for intermediate-mass black holes in globular clusters: Strong constraints from the JVLA |
| title_full_unstemmed | No evidence for intermediate-mass black holes in globular clusters: Strong constraints from the JVLA |
| title_short | No evidence for intermediate-mass black holes in globular clusters: Strong constraints from the JVLA |
| title_sort | no evidence for intermediate-mass black holes in globular clusters: strong constraints from the jvla |
| topic | general-radio continuum: general black hole physics-globular clusters |
| url | http://hdl.handle.net/20.500.11937/43068 |