Jun Yokogawa's home
last revised on 2003/03/24

News: Final(maybe) paper

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

[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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