Weighing the IMBH candidate CO-0.40-0.22* in the Galactic Centre

A. Ballone; M. Mapelli; M. Pasquato

doi:10.1093/MNRAS/STY2139

Weighing the IMBH candidate CO-0.40-0.22* in the Galactic Centre

A. Ballone, M. Mapelli, M. Pasquato

Research output: Contribution to journal › Article › peer-review

Abstract

The high velocity gradient observed in the compact cloud CO-0.40-0.22, at a projected distance of 60 pc from the centre of the Milky Way, has led its discoverers to identify the closeby mm continuum emitter, CO-0.40-0.22*, with an intermediate mass black hole (IMBH) candidate. We describe the interaction between CO-0.40-0.22 and the IMBH, by means of a simple analytical model and of hydrodynamical simulations. Through such calculation, we obtain a lower limit to the mass of CO-0.40-0.22* of few 10⁴×M_⊙. This result tends to exclude the formation of such massive black hole in the proximity of the Galactic Centre. On the other hand, CO-0.40-0.22* might have been brought to such distances in cosmological time-scales, if it was born in a dark matter halo or globular cluster around the Milky Way.

Original language	English (US)
Pages (from-to)	4684-4692
Number of pages	9
Journal	Monthly Notices of the Royal Astronomical Society
Volume	480
Issue number	4
DOIs	https://doi.org/10.1093/MNRAS/STY2139
State	Published - 2018

Keywords

Black hole physics
Galaxy: centre
ISM: clouds

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/MNRAS/STY2139

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title = "Weighing the IMBH candidate CO-0.40-0.22* in the Galactic Centre",

abstract = "The high velocity gradient observed in the compact cloud CO-0.40-0.22, at a projected distance of 60 pc from the centre of the Milky Way, has led its discoverers to identify the closeby mm continuum emitter, CO-0.40-0.22*, with an intermediate mass black hole (IMBH) candidate. We describe the interaction between CO-0.40-0.22 and the IMBH, by means of a simple analytical model and of hydrodynamical simulations. Through such calculation, we obtain a lower limit to the mass of CO-0.40-0.22* of few 104×M⊙. This result tends to exclude the formation of such massive black hole in the proximity of the Galactic Centre. On the other hand, CO-0.40-0.22* might have been brought to such distances in cosmological time-scales, if it was born in a dark matter halo or globular cluster around the Milky Way.",

keywords = "Black hole physics, Galaxy: centre, ISM: clouds",

author = "A. Ballone and M. Mapelli and M. Pasquato",

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year = "2018",

doi = "10.1093/MNRAS/STY2139",

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AU - Ballone, A.

AU - Mapelli, M.

AU - Pasquato, M.

PY - 2018

Y1 - 2018

N2 - The high velocity gradient observed in the compact cloud CO-0.40-0.22, at a projected distance of 60 pc from the centre of the Milky Way, has led its discoverers to identify the closeby mm continuum emitter, CO-0.40-0.22*, with an intermediate mass black hole (IMBH) candidate. We describe the interaction between CO-0.40-0.22 and the IMBH, by means of a simple analytical model and of hydrodynamical simulations. Through such calculation, we obtain a lower limit to the mass of CO-0.40-0.22* of few 104×M⊙. This result tends to exclude the formation of such massive black hole in the proximity of the Galactic Centre. On the other hand, CO-0.40-0.22* might have been brought to such distances in cosmological time-scales, if it was born in a dark matter halo or globular cluster around the Milky Way.

AB - The high velocity gradient observed in the compact cloud CO-0.40-0.22, at a projected distance of 60 pc from the centre of the Milky Way, has led its discoverers to identify the closeby mm continuum emitter, CO-0.40-0.22*, with an intermediate mass black hole (IMBH) candidate. We describe the interaction between CO-0.40-0.22 and the IMBH, by means of a simple analytical model and of hydrodynamical simulations. Through such calculation, we obtain a lower limit to the mass of CO-0.40-0.22* of few 104×M⊙. This result tends to exclude the formation of such massive black hole in the proximity of the Galactic Centre. On the other hand, CO-0.40-0.22* might have been brought to such distances in cosmological time-scales, if it was born in a dark matter halo or globular cluster around the Milky Way.

KW - Black hole physics

KW - Galaxy: centre

KW - ISM: clouds

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Weighing the IMBH candidate CO-0.40-0.22* in the Galactic Centre

Abstract

Keywords

ASJC Scopus subject areas

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