Low-luminosity x-ray active galactic nuclei in S0 galaxies NGC 3065 and NGC 4203

Naoko Iyomoto; Kazuo Makishima; Kyoko Matsushita; Yasushi Fukazawa; Makoto Tashiro; Takaya Ohashi

doi:10.1086/305974

Low-luminosity x-ray active galactic nuclei in S0 galaxies NGC 3065 and NGC 4203

Naoko Iyomoto, Kazuo Makishima, Kyoko Matsushita, Yasushi Fukazawa, Makoto Tashiro, Takaya Ohashi

研究成果: ジャーナルへの寄稿 › 学術誌 › 査読

22 被引用数 (Scopus)

抄録

We present ASCA X-ray results on two S0 galaxies, NGC 3065 and NGC 4203. In both galaxies, we detected hard X-ray emission from a pointlike source at the nucleus. A single power-law model having a photon index of ∼ 1.8 well described the spectra of these sources, while thin thermal emission, which is common in S0 galaxies, was not detected. The 2-10 keV luminosities of these nuclear sources (2.2 × 10⁴¹ and 1.5 × 10⁴⁰ ergs s^-1) are 1-2 orders of magnitude higher than those expected as an assembly of low-mass X-ray binaries in these galaxies. Our results strongly suggest that NGC 3065 and NGC 4203 host low-luminosity active galactic nuclei.

本文言語	英語
ページ（範囲）	168-173
ページ数	6
ジャーナル	Astrophysical Journal
巻	503
号	1 PART I
DOI	https://doi.org/10.1086/305974
出版ステータス	出版済み - 1998
外部発表	はい

!!!All Science Journal Classification (ASJC) codes

天文学と天体物理学
宇宙惑星科学

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title = "Low-luminosity x-ray active galactic nuclei in S0 galaxies NGC 3065 and NGC 4203",

abstract = "We present ASCA X-ray results on two S0 galaxies, NGC 3065 and NGC 4203. In both galaxies, we detected hard X-ray emission from a pointlike source at the nucleus. A single power-law model having a photon index of ∼ 1.8 well described the spectra of these sources, while thin thermal emission, which is common in S0 galaxies, was not detected. The 2-10 keV luminosities of these nuclear sources (2.2 × 1041 and 1.5 × 1040 ergs s-1) are 1-2 orders of magnitude higher than those expected as an assembly of low-mass X-ray binaries in these galaxies. Our results strongly suggest that NGC 3065 and NGC 4203 host low-luminosity active galactic nuclei.",

author = "Naoko Iyomoto and Kazuo Makishima and Kyoko Matsushita and Yasushi Fukazawa and Makoto Tashiro and Takaya Ohashi",

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doi = "10.1086/305974",

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volume = "503",

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journal = "Astrophysical Journal",

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T1 - Low-luminosity x-ray active galactic nuclei in S0 galaxies NGC 3065 and NGC 4203

AU - Iyomoto, Naoko

AU - Makishima, Kazuo

AU - Matsushita, Kyoko

AU - Fukazawa, Yasushi

AU - Tashiro, Makoto

AU - Ohashi, Takaya

PY - 1998

Y1 - 1998

N2 - We present ASCA X-ray results on two S0 galaxies, NGC 3065 and NGC 4203. In both galaxies, we detected hard X-ray emission from a pointlike source at the nucleus. A single power-law model having a photon index of ∼ 1.8 well described the spectra of these sources, while thin thermal emission, which is common in S0 galaxies, was not detected. The 2-10 keV luminosities of these nuclear sources (2.2 × 1041 and 1.5 × 1040 ergs s-1) are 1-2 orders of magnitude higher than those expected as an assembly of low-mass X-ray binaries in these galaxies. Our results strongly suggest that NGC 3065 and NGC 4203 host low-luminosity active galactic nuclei.

AB - We present ASCA X-ray results on two S0 galaxies, NGC 3065 and NGC 4203. In both galaxies, we detected hard X-ray emission from a pointlike source at the nucleus. A single power-law model having a photon index of ∼ 1.8 well described the spectra of these sources, while thin thermal emission, which is common in S0 galaxies, was not detected. The 2-10 keV luminosities of these nuclear sources (2.2 × 1041 and 1.5 × 1040 ergs s-1) are 1-2 orders of magnitude higher than those expected as an assembly of low-mass X-ray binaries in these galaxies. Our results strongly suggest that NGC 3065 and NGC 4203 host low-luminosity active galactic nuclei.

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Low-luminosity x-ray active galactic nuclei in S0 galaxies NGC 3065 and NGC 4203

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!!!All Science Journal Classification (ASJC) codes

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