Yasuhiro

Research Interests:

• Multi-Wavelength Extragalactic Astronomy
• Observational Cosmology
• Formation and Evolution of Galaxies
• Clusters of Galaxies
• Active Galactic Nuclei

Publications:

Refereed Publications

• �侻cattered X-rays in Obscured Active Galactic Nuclei and Their Implications for Geometrical Structure and Evolution�� Noguchi K., Terasawa Y., Ishino Y., Hashimoto Y., et al. 2010 ApJ, 711, 144
  
• �憕hotometric survey of the very small near-Earth asteroids with the SALT telescope . I. Lightcurves and periods for 14 objects�� Kwiatkowski T., �� Hashimoto Y., Kniazev A., Loaring N. et al. 2010 A&A, 509, 94
  
• �𡤜iscovery of the first symbiotic star in NGC6822�� Kniazev A., Vaisanen P., Whitelock P., �� Hashimoto Y., et al. 2009 MNRAS, 395, 1121
  
• �𥟡bservational detection of eight mutual eclipses and occultations between the satellites of Uranus�� Christou A. A., Lewis F., Roche P., Hashimoto Y., et al. 2009 A&A, 497, 589
  
• �憕hotometry of asteroid 2006 RH120 during its short visit to a geocentric orbit�� Kwiatkowski T., Kryszczynska A., Polinska M., �� Hashimoto Y., et al. 2009 A&A, 495, 967
  
• �𦯷n extreme EXO: a type 2 QSO at z = 1.87�� Del Moro A., Watson M.G., Mateos S., Akiyama M., Hashimoto Y., et al. 2009 A&A, 493, 445
• �𡤜etermining the extragalactic extinction law with SALT�� Frinkelman I., Brosch N., Kniazev A., �� Hashimoto Y., et al. 2008 MNRAS, 390, 969
• �𦯷lignment of Galaxies and Clusters�� Hashimoto Y., Henry J.P., Boehringer H. 2008 MNRAS, 390, 1562
• �嚹he metallicity extremes of the Sagittarius dSph using SALT spectrophotometry of PNe�� Kniazev A., Zijlstra A., Grebel E.K., �� Hashimoto Y., et al. 2008 MNRAS, 388, 1667
• �𦯷daptive optics imaging and optical spectroscopy of a major merger in a luminous infrared galaxy�� Vaisanen P., Mattila S., Kniazev A., �� Hashimoto Y., et al. 2008 MNRAS, 384, 886
• �嚹he polar ring galaxy AM1934-563 revisited�� Brosch N., Kniazev A., ��, Hashimoto Y., et al. 2007 MNRAS, 382, 1809
• �嚹he XMM-Newton Serendipitous Survey�� Barcons X., Carrera F.J., Ceballos M.T., �� Fabian A.C., Guillout P., Hashimoto Y., Hasinger G., et al. 2007 A&A, 476, 1191
• �𦔒nfluence of cluster environments on cluster morphology�� Hashimoto Y., Henry J.P., Boehringer H. 2007 MNRAS, 380, 835
• �侻UZAKU Observations of Active Galactic Nuclei Detected in the SWIFT/BAT Survey: Discovery of New Type of Buried Supermassive Black Holes�� Ueda Y., Eguchi S., Terasawa Y., Mushotzky R., Tueller J., Markwardt C., Gehrels N., Hashimoto Y., et al. 2007 ApJ, 664, L79
• �𦒄omparison between X-ray morphology and optical characteristics of clusters of galax- ies�� Hashimoto Y., Henry J.P., Boehringer H., Hasinger G. 2007 A&A, 468, 25
• �晉obust quantitative measures of cluster X-ray morphology, and comparisons between cluster characteristics�� Hashimoto Y., Boehringer H., Henry J.P., Hasinger G., Szokoly G. 2007 A&A, 467, 485
• �鑥ew cluster candidates in the extended XMM Lockman Hole field�� Finoguenov A., Streblyanska A., Hasinger G., Hashimoto Y., Szokoly G. 2005 ASR, 36, 710
• �嚹he Galaxy Populations of Double Cluster RX J1053.7+5735 at z=1.13�� Hashimoto Y., Henry J.P., Hasinger G., Szokoly G., Schmidt M., 2005 A&A, 439, 29
• �𦯷bundance Constraints and Direct Redshift Measurement of the Diffuse X-ray Emission from a Distant Cluster of Galaxies�� Hashimoto Y., Barcons X., Boehringer H., Fabian A.C., Hasinger G, Mainieri V., Brunner H. 2004 A&A, 417, 819
• �𤤴MM-Newton Observation of a Distant X-ray Selected Cluster of Galaxies at z=1.26 with Possible Cluster Interaction�� Hashimoto, Y., Hasinger, G., Arnaud, M., Rosati, P., et al. 2002 A&A, 381, 841
• �𤤴MM-Newton Observation of the Lockman Hole�� Hasinger, G., Altieri, B., Arnaud, M., Barcons, X., Bergeron, J., Brunner, H., Dadina, M., Dennerl, K., Ferrando, P., Finoguenov, A., Griffiths R.E., Hashimoto, Y., Jansen, F.A., Lumb, D.H., Mason, K.O., Mateos, S., McMahon, R.G., Miyaji, T., Paerelss, F., Page, M.J., Ptak, A.F., Sasseen, T.P., Schartel, N., Szokoly, G.P., Tr �� mper, J., Turner, M., Warwick, R.S., & Watson, M.G. 2001 A&A, 365, L45 u
• �𥟡n the Nature of AX J2049.6+2939 and AX J2050.0+2914�� Miyata, E., Ohta, K., Torii, K., Takeshima, T., Tsunemi, H., Hasegawa,T., Hashimoto, Y. 2001 ApJ, 550, 1023
• �嚹he Effect of Environment on Galaxy Interactions�� Hashimoto,Y. & Oemler,A. 2000 ApJ, 530, 652
• �𦚵oose Groups of Galaxies in the Las Campanas Redshift Survey�� Tucker,D.L., Oemler,A., Hashimoto,Y., Shectman,S.A., Kirshner,R.P., Lin,H., Landy,S.D., Schechter,P.L., & Allam, S. S. 2000 ApJS, 130, 237
• �侻tar Formation in Las Campanas Compact Groups�� Allam, S.S., Tucker,D.L., Lin,H. & Hashimoto,Y. 1999 ApJ, 522, L89
• �嚹he Concentration-Density Relation of Galaxies in the Las Campanas Redshift Survey�� Hashimoto,Y., & Oemler,A. 1999 ApJ, 510, 609
• �嚹he Influence of Environment on Star Formation Rates of Galaxies�� Hashimoto,Y., Oemler,A., Lin,H., & Tucker,D.L. 1998 ApJ, 499, 589
• �嚹he Environment of E+A Galaxies�� Zabludoff,A.I, Zaritsky,D., Lin,H., Tucker,D.L., Hashimoto,Y., Shectman,S.A.,Oemler,A., & Kirshner,R.P. 1996 ApJ, 466, 104
  

Proceedings & Abstracts

• �憕hotometric Survey of the Smallest Near-Earth Asteroids with the SALT Telescope�� Kwiatkowski T. Kryszczynska A., Polinska M., �� Hashimoto Y., et al. Proceeding of �𦯷steroids, Comets, Meteors 2008, 2008 Baltimore, USA
• �嚹he image quality of the Southern African Large Telescope�� O�稆onoghue D., Atad-Ettedgui E., Balona L., Bigelow B., �� Hashimoto Y., et al. Proceeding of �侻PIE conference 7018, 2008 Marseille, France
• �𥟡ptical and X-ray Morphologies of Galaxy Clusters, and comparisons with various cluster characteristics�� Hashimoto Y., Boehringer H., Henry J.P., Hasinger G. Proceeding of �嚹he first Subaru International Conference: Panoramatic Views of Galaxy Formation and Evolution, 2007 Hayama, Japan��
• �晉obust Objective Measures of Cluster X-ray Morphology�� Hashimoto Y., Boehringer H., Henry J.P., Hasinger G., Szokoly G. Proceeding of �嚹he Extreme Universe in the Suzaku Era 2007, 2007 Kyoto, Japan��
• �𢜛orphology of clusters of galaxies and its application�� Hashimoto Y., Boehringer H., Henry J.P., Hasinger G., Szokoly G. Proceeding of �𦔒AU Symposium No. 235, 2006 Prague��
• �𤤴-ray Abundance Constraints and Direct Redshift Measurement of a High redshift Cluster of Galaxies in the Lockman Hole �� Hashimoto, Y., Fabian, A., Barcons, H., Hasinger, G. et al. Proceeding of ��35th COSPAR Scientific Assembly, 2004 Paris��
• �𤤴MM-Newton Observation of a Distant X-ray Selected Cluster of Galaxies at z=1.26 with Possible Cluster Interaction�� Hashimoto, Y. & Hasinger, G. 2001 Proceeding of �鑥EW CENTURY OF X-RAY ASTRONOMY�� Astronomical Society of Pacific
• �嚹he XMM-Newton Deep Survey of the Lockman Hole�� Griffiths, R.E., Miyaji, T., Hasinger, G., Hashimoto, Y., Szokoly, G., Turner, M.J.L.T., Warwick,R.S., Watson, M.G., Paerels, F., Mason, K., Page, M.J., Trumper, J., Dennerl, K., Jansen, F., Lumb, D., Schartel, N., Bergeron, J., Rosati, P., Ferrando, P., Dadina, M., Sasseen, T., Barcons, X., McMahon, R. 2000 American Astronomical Society, HEAD meeting #32, #26.17
• �諪nvironmental Influence on Star Formation of Galaxies in the Las Campanas Redshift Sur- vey�� Hashimoto,Y., & Oemler,A. 1998, Proceeding of IAU Symp. 186, �𦒈alaxy Interactions at Low and High Redshift��, ed. D.B. Sanders (Dordrecht: Kluwer)
• �𦒈roups of Galaxies in the Las Campanas Redshift Survey�� Tucker, D.L., Hashimoto,Y. et. al 1998, Proceeding of Potsdam Cosmology Workshop, �𦚵arge Scale Structure-Tracks and Traces��, eds. V.M. Muller et al. (Singapore: World Scientific)
• �諪vidence for an Environmental Dependence of the E/S0 Ridgeline�� Stoughton,C., Annis,J., Tucker,D.L., Hashimoto,Y., McKay, T.A., & Smith, J.A. 1998 BAAS, 192, 51.03
• �憕roperties of Galaxies in the LCRS�� Hashimoto,Y., & Oemler,A. 1997 BAAS, 191, 63.01
• �嚹he Concentration-Density Relation of Galaxies�� Hashimoto,Y., & Oemler,A. 1997 BAAS, 190, 03.01
• �𦔒nfluence of Environments on Star Formation Properties of Galaxies�� Hashimoto,Y., & Oemler,A. 1996 BAAS, 189, 80.01