HSC-XD 52: An X-Ray detected AGN in a low-mass Galaxy at z ∼ 0.56

Goni Halevi; Andy Goulding; Jenny Greene; Jean Coupon; Anneya Golob; Stephen Gwyn; Sean D. Johnson; Thibaud Moutard; Marcin Sawicki; Hyewon Suh; Yoshiki Toba

doi:10.3847/2041-8213/ab4b4f

HSC-XD 52: An X-Ray detected AGN in a low-mass Galaxy at z ∼ 0.56

Goni Halevi, Andy Goulding, Jenny Greene, Jean Coupon, Anneya Golob, Stephen Gwyn, Sean D. Johnson, Thibaud Moutard, Marcin Sawicki, Hyewon Suh, Yoshiki Toba

Astrophysical Sciences

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8 Scopus citations

Abstract

The properties of low-mass galaxies hosting central black holes provide clues about the formation and evolution of the progenitors of supermassive black holes. In this Letter, we present HSC-XD 52, a spectroscopically confirmed low-mass active galactic nucleus (AGN) at an intermediate redshift of z ∼ 0.56. We detect this object as a very luminous X-ray source coincident with a galaxy observed by the Hyper Suprime-Cam (HSC) as part of a broader search for low-mass AGN. We constrain its stellar mass through spectral energy distribution modeling to be LMC-like at M _∗ ≈ 3 10⁹ M _o&dot;, placing it in the dwarf regime. We estimate a central black hole mass of M _BH ∼ 10⁶ M _o&dot;. With an average X-ray luminosity of, HSC-XD 52 is among the most luminous X-ray selected AGN in dwarf galaxies. The spectroscopic and photometric properties of HSC-XD 52 indicate that it is an intermediate-redshift counterpart to local low-mass AGN.

Original language	English (US)
Article number	L3
Journal	Astrophysical Journal Letters
Volume	885
Issue number	1
DOIs	https://doi.org/10.3847/2041-8213/ab4b4f
State	Published - Nov 1 2019

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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title = "HSC-XD 52: An X-Ray detected AGN in a low-mass Galaxy at z ∼ 0.56",

abstract = "The properties of low-mass galaxies hosting central black holes provide clues about the formation and evolution of the progenitors of supermassive black holes. In this Letter, we present HSC-XD 52, a spectroscopically confirmed low-mass active galactic nucleus (AGN) at an intermediate redshift of z ∼ 0.56. We detect this object as a very luminous X-ray source coincident with a galaxy observed by the Hyper Suprime-Cam (HSC) as part of a broader search for low-mass AGN. We constrain its stellar mass through spectral energy distribution modeling to be LMC-like at M ∗ ≈ 3 109 M o&dot;, placing it in the dwarf regime. We estimate a central black hole mass of M BH ∼ 106 M o&dot;. With an average X-ray luminosity of, HSC-XD 52 is among the most luminous X-ray selected AGN in dwarf galaxies. The spectroscopic and photometric properties of HSC-XD 52 indicate that it is an intermediate-redshift counterpart to local low-mass AGN.",

author = "Goni Halevi and Andy Goulding and Jenny Greene and Jean Coupon and Anneya Golob and Stephen Gwyn and Johnson, {Sean D.} and Thibaud Moutard and Marcin Sawicki and Hyewon Suh and Yoshiki Toba",

year = "2019",

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doi = "10.3847/2041-8213/ab4b4f",

language = "English (US)",

volume = "885",

journal = "Astrophysical Journal Letters",

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TY - JOUR

T1 - HSC-XD 52

T2 - An X-Ray detected AGN in a low-mass Galaxy at z ∼ 0.56

AU - Halevi, Goni

AU - Goulding, Andy

AU - Greene, Jenny

AU - Coupon, Jean

AU - Golob, Anneya

AU - Gwyn, Stephen

AU - Johnson, Sean D.

AU - Moutard, Thibaud

AU - Sawicki, Marcin

AU - Suh, Hyewon

AU - Toba, Yoshiki

PY - 2019/11/1

Y1 - 2019/11/1

N2 - The properties of low-mass galaxies hosting central black holes provide clues about the formation and evolution of the progenitors of supermassive black holes. In this Letter, we present HSC-XD 52, a spectroscopically confirmed low-mass active galactic nucleus (AGN) at an intermediate redshift of z ∼ 0.56. We detect this object as a very luminous X-ray source coincident with a galaxy observed by the Hyper Suprime-Cam (HSC) as part of a broader search for low-mass AGN. We constrain its stellar mass through spectral energy distribution modeling to be LMC-like at M ∗ ≈ 3 109 M o&dot;, placing it in the dwarf regime. We estimate a central black hole mass of M BH ∼ 106 M o&dot;. With an average X-ray luminosity of, HSC-XD 52 is among the most luminous X-ray selected AGN in dwarf galaxies. The spectroscopic and photometric properties of HSC-XD 52 indicate that it is an intermediate-redshift counterpart to local low-mass AGN.

AB - The properties of low-mass galaxies hosting central black holes provide clues about the formation and evolution of the progenitors of supermassive black holes. In this Letter, we present HSC-XD 52, a spectroscopically confirmed low-mass active galactic nucleus (AGN) at an intermediate redshift of z ∼ 0.56. We detect this object as a very luminous X-ray source coincident with a galaxy observed by the Hyper Suprime-Cam (HSC) as part of a broader search for low-mass AGN. We constrain its stellar mass through spectral energy distribution modeling to be LMC-like at M ∗ ≈ 3 109 M o&dot;, placing it in the dwarf regime. We estimate a central black hole mass of M BH ∼ 106 M o&dot;. With an average X-ray luminosity of, HSC-XD 52 is among the most luminous X-ray selected AGN in dwarf galaxies. The spectroscopic and photometric properties of HSC-XD 52 indicate that it is an intermediate-redshift counterpart to local low-mass AGN.

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DO - 10.3847/2041-8213/ab4b4f

M3 - Article

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SN - 2041-8205

VL - 885

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

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ER -

HSC-XD 52: An X-Ray detected AGN in a low-mass Galaxy at z ∼ 0.56

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