Determination of the wavelength dependence of interstellar polarization in the near-infrared

• Project/Area Number: 21540240
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Astronomy
• Research Institution: Kyoto University
• Principal Investigator: NAGATA Tetsuya 京都大学, 大学院・理学研究科, 教授 (80208016)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2009: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 光学赤外線天文学 / 星間偏光 / 星間減光 / 星間物質 / 銀河系 / 星間磁場 / 星間塵 / 波長依存性

Research Abstract

In the near-infrared wavelengths, polarization measurements with high accuracies have been achieved for astronomical objects in a variety of regions(toward the Galactic center, Galactic plane, and star forming regions), which in turn constrains the dust components in the interstellar medium quite strongly. Also, we have made new findings about the magnetic field in the star forming regions, plus new findings about the spatial distributions, x-ray emission, variable star properties and their ages, in these observations.

Research Products

• [Journal Article] Complex Scattered Radiation Fields and Multiple Magnetic Fields in the Protostellar Cluster in NGC 2264 (2011)
  • Author(s): Kwon, J., 他12名(Nakamura, F. 7番目)
  • Journal Title: The Astrophysical Journal Volume: Vol.741 Issue: 1 Pages: 35-35
  • DOI: 10.1088/0004-637x/741/1/35
  • Peer Reviewed
• [Journal Article] Three classical Cepheid variable stars in the nuclear bulge of the Milky Way (2011)
  • Author(s): Matsunaga, Noriyuki ; Nagata, Tetsuya
  • Journal Title: Nature Volume: 477, 7363 Issue: 7363 Pages: 188-190
  • DOI: 10.1038/nature10359
  • Peer Reviewed
• [Journal Article] Near-infrared-imaging Polarimetry Toward Serpens South : Revealing the Importance of the Magnetic Field (2011)
  • Author(s): Sugitani, K., Nakamura, F., 他10名
  • Journal Title: The Astrophysical Journal Volume: Vol.734 Issue: 1 Pages: 63-63
  • DOI: 10.1088/0004-637x/734/1/63
  • Peer Reviewed
• [Journal Article] Magnetic Field Configuration at the Galactic Center Investigated by Wide-field Near-infrared Polarimetry : Transition from a Toroidal to a Poloidal Magnetic Field (2010)
  • Author(s): Nishiyama, Shogo ; Nagata, Tetsuya
  • Journal Title: The Astrophysical Journal Letters Pages: 23-27
• [Journal Article] Near-infrared Imaging Polarimetry of the Serpens Cloud Core : Magnetic Field Structure, Outflows, and Inflows in a Cluster Forming Clump (2010)
  • Author(s): Sugitani, K., Nakamura, F., Tamura, M., Watanabe, M., Kandori, R., Nishiyama, S., Kusakabe, N., Hashimoto, J., Nagata, T., Sato, S.
  • Journal Title: The Astrophysical Journal Volume: 716 Pages: 299-3140
  • Peer Reviewed
• [Journal Article] Magnetic Field Configuration at the Galactic Center Investigated by Wide-field Near-infrared Polarimetry : Transition from a Toroidal to a Poloidal Magnetic Field (2010)
  • Author(s): Nishiyama, S., Hatano, H., Tamura, M., Matsunaga, N., Yoshikawa, T., Suenaga, T., Hough, J.H., Sugitani, K., Nagayama, T., Kato, D., Nagata, T.
  • Journal Title: The Astrophysical Journal Letters Volume: 722
  • Peer Reviewed
• [Journal Article] Interstellar Extinction Law Toward the Galactic Center III : J, H, KS Bands in the 2MASS and the MKO Systems (2009)
  • Author(s): Nishiyama, Shogo ; Nagata, Tetsuya
  • Journal Title: The Astrophysical Journal Volume: Volume 696, Issue 2 Issue: 2 Pages: 1407-1417
  • DOI: 10.1088/0004-637x/696/2/1407
  • Peer Reviewed
• [Journal Article] Near-Infrared Polarimetry of Flares from Sgr A^* with Subaru/CIAO (2009)
  • Author(s): Nishiyama, S. ; Tamura, M. ; Hatano, H. ; Nagata, T. ; Kudo, T. ; Ishii.M. ; Schodel, R. ;
  • Journal Title: The Astrophysical Journal Letters 702
  • Peer Reviewed
• [Journal Article] Near-Infrared Counterparts to Chandra X-Ray Sources Toward the Galactic Center. I. Statistics and a Catalog of Candidates (2009)
  • Author(s): Mauerhan, J.C. ; Muno, M.P. ; Morris, M.R. ; Bauer, F.E. ; Nishiyama, S. ; Nagata, T.
  • Journal Title: The Astrophysical Journal 703 Pages: 30-41
  • Peer Reviewed
• [Journal Article] A near-infrared survey of Miras and the distance to the Galactic Centre (2009)
  • Author(s): Matsunaga, N. ; Kawadu, T. ; Nishiyama, S. ; Nagayama, T. ; Hatano, H. ; Tamura, M. ; Glass, I. S.
  • Journal Title: Monthly Notices of the Royal Astronomical Society 399 Pages: 1709-1729
  • Peer Reviewed
• [Presentation] 偏光観測を用いた銀河系中心におけるYSO探査 (2011)
  • Author(s): 義川達人, ほか
  • Organizer: 日本天文学会2011年春季年
  • Place of Presentation: 筑波大学
  • Year and Date: 2011-03-17
• [Presentation] 偏光観測を用いた銀河系中心におけるYSO探査 (2011)
  • Author(s): 義川達人, ほか
  • Organizer: 日本天文学会2011年春季年会
  • Place of Presentation: 筑波大学
  • Year and Date: 2011-03-17
• [Presentation] 近赤外線偏光観測による銀河系中心部の磁場構造の研究 (2009)
  • Author(s): 西山正吾, ほか
  • Organizer: 日本天文学会2009年秋季年会
  • Place of Presentation: 山口大学
  • Year and Date: 2009-09-14
• [Remarks] 報道関連銀河系中心部での近赤外線によるセファイド変光星の発見は、京都新聞(2011年8月25日26面)、日本経済新聞(8月25日夕刊14面)および毎日新聞(8月29日4面)に掲載されるとともに、フジテレビ、さまざまなウェブサイトでも取り上げられた。ホームページ
  • URL: http://www.kusastro.kyoto-u.ac.jp/~nagata/Gcpol_lambda/index.htm
• [Remarks]
  • URL: http://www.kusastro.kyoto-u/ac.jp/~nagata/Gcpollambda/index.htm
• [Remarks]
  • URL: http://www.kusastro.kyoto-u.ac.jp/~nagata/Gcpol_lambda/index.htm
• [Remarks]
  • URL: http://www.kusastro.kyoto-u.ac.jp/~nagata/Gcpollambda/index.htm