Jun Yokogawa

Jun Yokogawa's home

last revised on 2003/03/24

News: Final(maybe) paper

Review of the Discrete X-Ray Sources in the Small Magellanic Cloud - will appear in PASJ. [astro-ph/0302163] [pdf with high-resolution images]
Recent Activities

I am teaching physics and chemistry at juku (supplementary school for high-school students).
Besides juku, I will teach physics at a private high school and a public high school from next April. I am being a little bit nervous about this new job.
Previous Activities

Ph.D. thesis is now available at this page.
Final report (poster presentation in Japanese) is here.
New transient pulsar in the Scutum Arm Region [go]: appeared in PASJ.
Spectroscopy and imaging study of SNRs in the SMC [go]: appeared in PASJ.
Chandra observations of diffuse X-rays in the Galactic center region: [astro-ph/0202010] [go]
SMC Pulsar papers: [XTE J0054-720] [SMC X-2] [AX J0049-732] [AX J0049.5-7323] [AX J0057.4-7325] [AX J0051.6-7311] [AX J0058-7203] [AX J0051-733] [AX J0049-729]
"SNR Twins" in the LMC, DEM L316 [go]: appeared in PASJ.
An ASCA study of the source populations in the SMC [go]: appeard in ApJS!
Detection of a pulsed soft excess from a bright pulsar in the SMC [go]: appeared in ApJ.
Detection of an unpulsed soft component from a bright pulsar in the SMC [go]: appeared in PASJ.
Discovery of a 1550-s pulsator in our Galaxy [go]: appeared in ApJL.
Deep observations of two SNRs in our Galaxy [go]: appeared in PASJ.

[Members] [Home of our lab.] [Home of 98ers]
[Previous works] [Refereed journals] [Proceedings etc.]

Previous works: X-ray studies on...

The Magellanic Clouds

(Pulsars, SNRs, Source classification, Population...)

SNRs and compact objects in our Galaxy

(Thermal and non-thermal emission, Chemical abundances, Pulsars...)

Wolf-Rayet stars

(Collision of winds, Chemical abundances on stellar surfaces...)

Publications: refereed journals

The Magellanic Clouds

Review of Discrete X-Ray Sources in the Small Magellanic Cloud: Summary of the ASCA Results and Implication on the Recent Star Forming Activity: High-resolution images are included in [pdf] below.; [astro-ph/0302163] [pdf (with high-res images)]; J. Yokogawa, K. Imanishi, M. Tsujimoto, K. Koyama, and M. Nishiuchi; 2003, PASJ

Centrally Peaked X-Ray Supernova Remnants in the Small Magellanic Cloud Studied with ASCA and ROSAT: [ADS] [html] [ps.gz] [pdf] [astro-ph/0201169] [ps.gz (with high-res images)] [pdf (with high-res images)]; J. Yokogawa, K. Imanishi, K. Koyama, M. Nishiuchi, and N. Mizuno; 2002, PASJ 54, 53

A 168-s X-Ray Pulsar in the SMC Observed with ASCA: [ADS] [html] [ps.gz] [pdf]; J. Yokogawa, K. Torii, T. Kohmura, and K. Koyama; 2001, PASJ 53, L9

ASCA Identification of SMC X-2 with the 2.37-s Pulsar Discovered by RXTE: [ADS] [html] [ps.gz] [pdf]; J. Yokogawa, K. Torii, T. Kohmura, and K. Koyama; 2001, PASJ 53, 227

ASCA Observations of the Twin Supernova Remnants in the Large Magellanic Cloud, DEM L316: [ADS] [html] [ps.gz] [pdf]; M. Nishiuchi, J. Yokogawa, K. Koyama, and J. P. Hughes; 2001, PASJ 53, 99

Discovery of a 9-s X-Ray Pulsar, AX J0049-732, in the Small Magellanic Cloud: [ADS] [astro-ph/0012342]; M. Ueno, J. Yokogawa, K. Imanishi, and K. Koyama; 2000, PASJ 52, L63

Discovery of the Slowest X-Ray Pulsar in the SMC, AX J0049.5-7323, with ASCA: [ADS] [astro-ph/0011260]; J. Yokogawa, K. Imanishi, M. Ueno, and K. Koyama; 2000, PASJ 52, L73

Discovery of 101-s Pulsations from AX J0057.4-7325 in the SMC with ASCA: [ADS] [astro-ph/0011049]; J. Yokogawa, K. Torii, T. Kohmura, K. Imanishi, and K. Koyama; 2000, PASJ 52, L53

Discovery of 172-s Pulsations from a Be/X-ray Binary Candidate AX J0051.6-7311 in the SMC with ASCA: [ADS] [astro-ph/0009104]; J. Yokogawa, K. Torii, K. Imanishi, and K. Koyama; 2000, PASJ 52, L37

ASCA Observation of the New Transient X-ray Pulsar XTE J0111.2-7317 in the Small Magellanic Cloud: [ADS] [html] [ps] [pdf]; J. Yokogawa, B. Paul, M. Ozaki, F. Nagase, D. Chakrabarty, and T. Takeshima; 2000, ApJ 539, 191

A Study of the Populations of X-ray Sources in the Small Magellanic Cloud with ASCA: [ADS] [html] [ps] [pdf]; J. Yokogawa, K. Imanishi, M. Tsujimoto, M. Nishiuchi, K. Koyama, F. Nagase, and R.H.D. Corbet; 2000, ApJS 128, 491

Broad-Band X-Ray Study of a Transient Pulsar RX J0059.2-7138: [ADS] [astro-ph/0003126]; M. Kohno, J. Yokogawa, and K. Koyama; 2000, PASJ 52, 299

Discovery of an X-Ray Pulsar in the SMC: AX J0058-7203: [ADS] [astro-ph/9910505]; M. Tsujimoto, K. Imanishi, J. Yokogawa, and K. Koyama; 1999, PASJ 51, L21

ASCA Discovery of a Be X-Ray Pulsar in the SMC: AX J0051-733: [ADS] [astro-ph/9910463]; K. Imanishi, J. Yokogawa, M. Tsujimoto, and K. Koyama; 1999, PASJ 51, L15

Discovery of a New X-ray Pulsar, AX J0049-729, in the Small Magellanic Cloud with ASCA: [ADS] [ps.gz]; J. Yokogawa, K. Imanishi, M. Tsujimoto, M. Kohno, and K. Koyama; 1999, PASJ 51, 547

X-ray Population Study in the Small Magellanic Cloud with ASCA: ApJS version is strongly recommended.; [ps.gz]; J. Yokogawa; 1999, Master thesis, Kyoto University

AX J0049.4-7323: [IAUC]; M. Ueno, J. Yokogawa, K. Imanishi, and K. Koyama; 2000, IAU Circ. 7442

AX J0057.4-7325 AND SMC X-2: [IAUC]; K. Torii, T. Kohmura, J. Yokogawa, and K. Koyama; 2000, IAU Circ. 7441

AX J0051.6-7311: [IAUC]; K. Torii, J. Yokogawa, K. Imanishi, and K. Koyama; 2000, IAU Circ. 7428

AX J0043-737: [IAUC]; J. Yokogawa, and K. Koyama; 2000, IAU Circ. 7361

XTE J0111.2-7317: [IAUC]; D. Chakrabarty, T. Takeshima, M. Ozaki, B. Paul, and J. Yokogawa; 1998, IAU Circ. 7062

AX J0049-732: [IAUC]; K. Imanishi, J. Yokogawa, and K. Koyama; 1998, IAU Circ. 7040

AX J0105-722: [IAUC]; J. Yokogawa, and K. Koyama; 1998, IAU Circ. 7028

AX J0103-722 = 1SAX J0103.2-7209: [IAUC]; J. Yokogawa, and K. Koyama; 1998, IAU Circ. 7009

AX J0051-733 and AX J0058-720: [IAUC]; J. Yokogawa, and K. Koyama; 1998, IAU Circ. 6853

AX J0049-729: [IAUC]; J. Yokogawa, and K. Koyama; 1998, IAU Circ. 6835

SNRs and compact objects in our Galaxy

Discovery of a Transient X-Ray Pulsar, AX J1841.0-0536, in the Scutum Arm Region with ASCA: [ADS] [html] [ps.gz] [pdf]; A. Bamba, J. Yokogawa, M. Ueno, K. Koyama, and S. Yamauchi; 2001, PASJ 53, 1179

Discovery of a new pulsating X-ray source with a 1549.1 second period, AX J183220-0840: [ADS] [html] [ps] [pdf]; M. Sugizaki, K. Kinugasa, K. Matsuzaki, Y. Terada, S. Yamauchi, and J. Yokogawa; 2000, ApJ 534, L181

Deep X-ray Observations of Supernova Remnants G359.1-0.5 and G359.0-0.9 with ASCA: [ADS] [astro-ph/0003057]; A. Bamba, J. Yokogawa, M. Sakano, and K. Koyama; 2000, PASJ 52, 259

X-ray Detection from Shell-like SNR G359.1-0.5: [ADS]; J. Yokogawa, M. Sakano, K. Koyama, and S. Yamauchi; 2000, Advances in Space Research, 25, 571

Non Thermal X-ray from Galactic Supernova Remnants: [ADS]; H. Tomida, K. Koyama, J. Yokogawa, and S. Yamauchi; 2000, Advances in Space Research, 25, 695

ASCA Observations of the Supernova Remnant G156.2+5.7: Ginga observation is added to PASJ version.; [ADS]; S. Yamauchi, J. Yokogawa, H. Tomida, K. Koyama, and K. Tamura; 2000, Advances in Space Research, 25, 567

ASCA Observations of the Supernova Remnant G156.2+5.7: [ADS]; S. Yamauchi, K. Koyama, H. Tomida, J. Yokogawa, and K. Tamura; 1999, PASJ 51, 13

Wolf-Rayet Stars

X-ray Evidence for Wind-Wind Collision in the Wolf-Rayet Binary V444 Cygni: [ADS] [html] [ps] [pdf]; Y. Maeda, K. Koyama, J. Yokogawa, and S. Skinner; 1999, ApJ 510, 967

Misc.

Mass Estimation of Cold Matters in the Galactic Center Region Using Bright Hard X-ray Sources: [ADS]; M. Sakano, K. Koyama, M. Nishiuchi, J. Yokogawa, and Y. Maeda; 1999, Advances in Space Research, 23, 969

Publications: proceedings etc.

The Magellanic Clouds

ASCA X-ray Survey of the Magellanic Clouds: Implications on the Past Activities in the Galaxies: [ps.gz]; J. Yokogawa, K. Imanishi, M. Tsujimoto, M. Nishiuchi, and K. Koyama; 1999, proc. of Japanese-German Workshop on AGN and the X-ray Background (ISAS, Japan, November 1-3, 1999), 212

Star Formation History in the Magellanic Clouds: X-ray Observations of Stellar Remnants: [ps.gz]; J. Yokogawa, K. Imanishi, M. Tsujimoto, M. Nishiuchi, and K. Koyama; 1999, proc. of "Star Formation 1999" Symposium (Nagoya University, Japan, June 21-25, 1999), 52

X-ray Survey of the Magellanic Clouds with ASCA: Source Classification and Population: [ADS] [ps.gz]; J. Yokogawa, K. Imanishi, M. Tsujimoto, M. Nishiuchi, and K. Koyama; 1999, Astronomische Nachrichten 320, 360

High Energy Phenomena in the Magellanic Clouds (Discrete Sources) (Japanese): [ps.gz]; J. Yokogawa, K. Imanishi, M. Tsujimoto, M. Nishiuchi, and K. Koyama; 1999, proc. of the Magellanic Clouds Conference (National Astronomical Observatory, Japan, February 22-25, 1999)

Cosmic-ray Acceleration in the Small Magellanic Cloud (Japanese): [ps.gz]; J. Yokogawa, K. Imanishi, M. Tsujimoto, and K. Koyama; 1998, proc. of Neutron Star Workshop (University of Tokyo, Japan, December 24-26, 1998)

Cosmic-ray Acceleration in the Small Magellanic Cloud (Japanese): [ps.gz]; J. Yokogawa, K. Imanishi, M. Tsujimoto, and K. Koyama; 1998, proc. of High Energy Astrophysics Workshop (Yamanashi, Japan, December 10-12, 1998)

"Pulsar Rush" in the Small Magellanic Cloud --- Treasure Hunting of "98ers": [ps.gz]; J. Yokogawa, K. Imanishi, M. Tsujimoto, and K. Koyama; 1999, proc. of Japanese-German Workshop on High Energy Astrophysics (Kyoto, Japan, October 19-21, 1998)

SNRs and compact objects in our Galaxy

Diffuse X-rays in the Galactic center region -- The zoo of iron line clumps, non-thermal filaments and hot plasmas --: [astro-ph/0202010]; A. Bamba, H. Murakami, A. Senda, S. Takagi, J. Yokogawa, and K. Koyama; proc. of the Symposium "New Visions of the X-ray Universe in the XMM-Newton and Chandra era", Noordwijk-NL, November 2001

X-ray Detection from the Shell-like Radio SNR G359.1-0.5 (Japanese): [ps.gz]; J. Yokogawa, M. Sakano, K. Koyama, and S. Yamauchi; 1998, proc. of High Energy Astrophysics Workshop (Saitama, Japan, December 17-20, 1997); "Genshikaku Kenkyu" 42, 123

Wolf-Rayet Stars

X-ray Evidence for Wind-Wind Collision in the Wolf-Rayet Binary System V444 Cygni: [ps.gz]; J. Yokogawa, K. Koyama, Y. Maeda, and S. Skinner; 1999, 193rd IAU Symposium "Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies" (Puerto Vallarta, Mexico, November 2-7, 1998)

Send your requests, comments, etc. to
Jun Yokogawa (jun@cr.scphys.kyoto-u.ac.jp).
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