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

被引：8

作者：

Halevi, Goni ^{[1
]}

Goulding, Andy ^{[1
]}

Greene, Jenny ^{[1
]}

Coupon, Jean ^{[2
]}

Golob, Anneya ^{[3
]}

Gwyn, Stephen ^{[4
]}

Johnson, Sean D. ^{[1
,5
]}

Moutard, Thibaud ^{[3
]}

Sawicki, Marcin ^{[3
,4
]}

Suh, Hyewon ^{[6
]}

Toba, Yoshiki ^{[7
,8
,9
]}

机构：

[1] Princeton Univ, Dept Astrophys Sci, 4 Ivy Lane, Princeton, NJ 08544 USA

[2] Univ Geneva, Dept Astron, Ch Ecogia 16, CH-1290 Versoix, Switzerland

[3] St Marys Univ, Inst Computat Astrophys, Dept Phys & Astron, Halifax, NS, Canada

[4] NRC Herzberg Astron & Astrophys, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada

[5] Observ Carnegie Inst Sci, 813 Santa Barbara St, Pasadena, CA 91101 USA

[6] Natl Astron Observ Japan, Subaru Telescope, 650 North Aohoku Pl, Hilo, HI 96720 USA

[7] Kyoto Univ, Dept Astron, Sakyo Ku, Kitashirakawa Oiwake Cho, Kyoto 6068502, Japan

[8] Acad Sinica, Inst Astron & Astrophys, 11F Astron Math Bldg,AS-NTU 1,Sect 4,Roosevelt Rd, Taipei 10617, Taiwan

[9] Ehime Univ, Res Ctr Space & Cosm Evolut, 2-5 Bunkyo Cho, Matsuyama, Ehime 7908577, Japan

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2019年 / 885卷 / 01期

基金：

日本科学技术振兴机构; 日本学术振兴会; 美国国家科学基金会;

关键词：

ACTIVE GALACTIC NUCLEI; BLACK-HOLES; SEYFERT-1; GALAXY; EMISSION; STELLAR; VIEW;

D O I：

10.3847/2041-8213/ab4b4f

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 similar to 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 Ma(*) approximate to 3 x 10(9) Me-circle dot, placing it in the dwarf regime. We estimate a central black hole mass of M-BH similar to 10(6) Me-circle dot. With an average X-ray luminosity of L-X approximate to 3.5 x 10(43) erg s(-1), 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.

引用

页数：6

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