Discovery of a new X-ray burst/millisecond accreting pulsar, HETE J1900.1-2455

Motoko Suzuki; Nobuyuki Kawai; Toru Tamagawa; Atsumasa Yoshida; Yujin E. Nakagawa; Kaoru Tanaka; Yuji Shirasaki; Masaru Matsuoka; George R. Ricker; Roland Vanderspek; Nat Butler; Donald Q. Lamb; Carlo Graziani; Graziella Pizzichini; Rie Sato; Makoto Arimoto; Jun'ichi Kotoku; Miki Maetou; Makoto Yamauchi

Discovery of a new X-ray burst/millisecond accreting pulsar, HETE J1900.1-2455

Motoko Suzuki^*, Nobuyuki Kawai, Toru Tamagawa, Atsumasa Yoshida, Yujin E. Nakagawa, Kaoru Tanaka, Yuji Shirasaki, Masaru Matsuoka, George R. Ricker, Roland Vanderspek, Nat Butler, Donald Q. Lamb, Carlo Graziani, Graziella Pizzichini, Rie Sato, Makoto Arimoto, Jun'ichi Kotoku, Miki Maetou, Makoto Yamauchi

^*Corresponding author for this work

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

8 Citations (Scopus)

Abstract

A class of low-mass X-ray binary sources is known to be both X-ray burst sources and millisecond pulsars at the same time. A new source of this class was discovered by High Energy Transient Explorer 2 (HETE-2) on 2005 June 14 as a source of type-I X-ray bursts, which was named HETE J1900.1-2455. Five X-ray bursts from HETE J1900.1-2455 were observed during the summer of 2005. A time-resolved spectral analysis of these bursts has revealed that their spectra are consistent with the blackbody radiation throughout the bursts. The bursts show an indication of radius expansion. The bolometric flux remained almost constant during the photospheric radius expansion, while blackbody temperature dropped during the same period. Assuming that the flux reached the Eddington limit on a standard 1.4 solar-mass neutron star with a helium atmosphere, we estimate the distance to the source to be ∼ 4 kpc.

Original language	English
Pages (from-to)	263-268
Number of pages	6
Journal	Publications of the Astronomical Society of Japan
Volume	59
Issue number	1
Publication status	Published - 2007
Externally published	Yes

Keywords

Stars: neutron
Stars: pulsars: individual (HETE J1900.1-2455)
X-rays: bursts

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Cite this

Suzuki, M., Kawai, N., Tamagawa, T., Yoshida, A., Nakagawa, Y. E., Tanaka, K., Shirasaki, Y., Matsuoka, M., Ricker, G. R., Vanderspek, R., Butler, N., Lamb, D. Q., Graziani, C., Pizzichini, G., Sato, R., Arimoto, M., Kotoku, J., Maetou, M., & Yamauchi, M. (2007). Discovery of a new X-ray burst/millisecond accreting pulsar, HETE J1900.1-2455. Publications of the Astronomical Society of Japan, 59(1), 263-268.

Suzuki, M, Kawai, N, Tamagawa, T, Yoshida, A, Nakagawa, YE, Tanaka, K, Shirasaki, Y, Matsuoka, M, Ricker, GR, Vanderspek, R, Butler, N, Lamb, DQ, Graziani, C, Pizzichini, G, Sato, R, Arimoto, M, Kotoku, J, Maetou, M & Yamauchi, M 2007, 'Discovery of a new X-ray burst/millisecond accreting pulsar, HETE J1900.1-2455', Publications of the Astronomical Society of Japan, vol. 59, no. 1, pp. 263-268.

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title = "Discovery of a new X-ray burst/millisecond accreting pulsar, HETE J1900.1-2455",

abstract = "A class of low-mass X-ray binary sources is known to be both X-ray burst sources and millisecond pulsars at the same time. A new source of this class was discovered by High Energy Transient Explorer 2 (HETE-2) on 2005 June 14 as a source of type-I X-ray bursts, which was named HETE J1900.1-2455. Five X-ray bursts from HETE J1900.1-2455 were observed during the summer of 2005. A time-resolved spectral analysis of these bursts has revealed that their spectra are consistent with the blackbody radiation throughout the bursts. The bursts show an indication of radius expansion. The bolometric flux remained almost constant during the photospheric radius expansion, while blackbody temperature dropped during the same period. Assuming that the flux reached the Eddington limit on a standard 1.4 solar-mass neutron star with a helium atmosphere, we estimate the distance to the source to be ∼ 4 kpc.",

keywords = "Stars: neutron, Stars: pulsars: individual (HETE J1900.1-2455), X-rays: bursts",

author = "Motoko Suzuki and Nobuyuki Kawai and Toru Tamagawa and Atsumasa Yoshida and Nakagawa, {Yujin E.} and Kaoru Tanaka and Yuji Shirasaki and Masaru Matsuoka and Ricker, {George R.} and Roland Vanderspek and Nat Butler and Lamb, {Donald Q.} and Carlo Graziani and Graziella Pizzichini and Rie Sato and Makoto Arimoto and Jun'ichi Kotoku and Miki Maetou and Makoto Yamauchi",

year = "2007",

language = "English",

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pages = "263--268",

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T1 - Discovery of a new X-ray burst/millisecond accreting pulsar, HETE J1900.1-2455

AU - Suzuki, Motoko

AU - Kawai, Nobuyuki

AU - Tamagawa, Toru

AU - Yoshida, Atsumasa

AU - Nakagawa, Yujin E.

AU - Tanaka, Kaoru

AU - Shirasaki, Yuji

AU - Matsuoka, Masaru

AU - Ricker, George R.

AU - Vanderspek, Roland

AU - Butler, Nat

AU - Lamb, Donald Q.

AU - Graziani, Carlo

AU - Pizzichini, Graziella

AU - Sato, Rie

AU - Arimoto, Makoto

AU - Kotoku, Jun'ichi

AU - Maetou, Miki

AU - Yamauchi, Makoto

PY - 2007

Y1 - 2007

N2 - A class of low-mass X-ray binary sources is known to be both X-ray burst sources and millisecond pulsars at the same time. A new source of this class was discovered by High Energy Transient Explorer 2 (HETE-2) on 2005 June 14 as a source of type-I X-ray bursts, which was named HETE J1900.1-2455. Five X-ray bursts from HETE J1900.1-2455 were observed during the summer of 2005. A time-resolved spectral analysis of these bursts has revealed that their spectra are consistent with the blackbody radiation throughout the bursts. The bursts show an indication of radius expansion. The bolometric flux remained almost constant during the photospheric radius expansion, while blackbody temperature dropped during the same period. Assuming that the flux reached the Eddington limit on a standard 1.4 solar-mass neutron star with a helium atmosphere, we estimate the distance to the source to be ∼ 4 kpc.

AB - A class of low-mass X-ray binary sources is known to be both X-ray burst sources and millisecond pulsars at the same time. A new source of this class was discovered by High Energy Transient Explorer 2 (HETE-2) on 2005 June 14 as a source of type-I X-ray bursts, which was named HETE J1900.1-2455. Five X-ray bursts from HETE J1900.1-2455 were observed during the summer of 2005. A time-resolved spectral analysis of these bursts has revealed that their spectra are consistent with the blackbody radiation throughout the bursts. The bursts show an indication of radius expansion. The bolometric flux remained almost constant during the photospheric radius expansion, while blackbody temperature dropped during the same period. Assuming that the flux reached the Eddington limit on a standard 1.4 solar-mass neutron star with a helium atmosphere, we estimate the distance to the source to be ∼ 4 kpc.

KW - Stars: neutron

KW - Stars: pulsars: individual (HETE J1900.1-2455)

KW - X-rays: bursts

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Discovery of a new X-ray burst/millisecond accreting pulsar, HETE J1900.1-2455

Abstract

Keywords

ASJC Scopus subject areas

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