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Survey of Intracluster Planetary Nebulae in the Virgo Cluster

Research Project

Project/Area Number 13640231
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Astronomy
Research InstitutionThe University of Tokyo

Principal Investigator

OKAMURA Sadanori  The University of Tokyo, Graduate School of Science, Professor, 大学院・理学系研究科, 教授 (20114423)

Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2002: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2001: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsCluster of Galaxies / Stars in intracluster space / Planetary nebulae / おとめ座銀河団
Research Abstract

In spring, 2001, we observed with Subaru telescope the area for one field of view of Suprime-cam, which is located in the core region of the Virgo cluster. We took broad-band V (15 min. exp.) and R (12 min. exp.) images in addition to narrow-band O[III]λ5007Å and Hαλ6563Å images. The results obtained in the present study are summarized in the following.
This was the first study to use the two emmission lines for the search of planetary nebulae. We defined the appropriate selection criteria for intracluster planetary nebulae (ICPNe) candidates based on the (O[III]-Hα) versus (O[III]-(V+R)) two-color diagram.
Using the newly setablished criteria, we found 38 secure ICPNe candidates in the 27'× 24' field in the cluster core region. Projected sky distibution of the 38 candidates is highly non-uniform, indicating possible association with M86-M84 subcluster. The fraction of diffuse intracluster light with respect to the light from galaxies was estimated to be 〜10%, and the baryonic fraction of the total mass including dark matter was calculated to be 〜20% in the observed field.
During the course of this study, we serendipitously found a compact HII region, which is far away from NGC 4388 and almost isolated from any galaxay. It is a small HII region powered by only a few OB stars. This is the first discovery of a star forming site so far away from a galaxy. Similar objects, if found in future, would have a significant impact on the formation process of galaxies.
Another seredipitous discovery was the extremely extended emission line regions around NGC 4388 in the deep Hα image. It is the largest of its kind with the size of 35kpc.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] S.Okamura et al.(20 authors): "Candidates for Intracluster Planetary Nebulae in the Virgo Cluster based on the Suprirme-Cam Narrow-Band Imaging in O [III] and Hα"Publ.Astron.Soc.Japan. 54. 883-889 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Arnaboldi et al.(20 authors including S.Okamura): "Narrow band imaging in O [III] and Hα to search for ICPNe in the Virgo cluster"Astrophysical Journal. 125. 514-524 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] O.Gerhard et al.(4 authors including S.Okamura): "Isolated Star Formation : A Compact HII Region in the Virgo Cluster"Astrophysical Journal (Letters). 580. L121-L124 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Yoshida et al.(20 authors including S.Okamura): "Discovery of Extremely Extended Ionized Gas around the Seyfert 2 Galaxy NGC 4388"Astrophysical Journal. 567. 118-129 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] S.Miyazaki et al.(15 authors including S.Okamura): "Subaru Prime Focus Camera -Suprime-Cam -"Publ.Astron.Soc.Japan. 54. 833-853 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Arnaboldi et al.: "Narrow band imaging in O[III]and H α to search for ICPNe in the Virgo cluster"Astrophysical Journal. 125. 514-524 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] O. Gerhard et al.: "Isolated Star Formation : A Compact HII Region in the Virgo Cluster"Astrophysical Journal (Letters). 580. L121-L124 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Yoshida et al.: "Discovery of Extremely Extended Ionized Gas around the Seyfert 2 Galaxy NGC 4388"Astrophysical Journal. 567. 118-129 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Okamura, S. et al.: "Candidates for Intracluster Planetary Nebulae in the Virgo Cluster based on the Suprirme-Cam Narrow-Band Imaging in O [III] and H α"Publ. Astron. Soc.. 54 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] S. Miyazaki et al.: "Subaru Prime Focus Camera - Suprime-Cam -"Publ. Astron. Soc.. 54 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] S.Okamura et al.(20 authors): "Candidates for Intracluster Planetary Nebulae in the Virgo Cluster based on the Suprirme-Cam Narrow-Band Imaging in O [III] and Hα"Publ. Astron. Soc. Japan. 54. 883-889 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Arnaboldi et al.(20 authors including S.Okamura): "Narrow band imaging in O[III] and Hα to search for ICPNe in the Virgo cluster"Astrophysical Journal. 125. 514-524 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] O.Gerhard et al.(4 authors including S.Okamura): "Isolated Star Formation : A Compact HII Region in the Virgo Cluster"Astrophysical Journal (Letters). 580. L121-L124 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Yoshida et al.(20 authors including S.Okamura): "Discovery of Extremely Extended lonized Gas around the Seyfert 2 Galaxy NGC 4388"Astrophysical Journal. 567. 118-129 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.Miyazaki et al.(15 authors including S.Okamura): "Subaru Prime Focus Camera -Suprime-Cam -"Publ. Astron. Soc. Japan. 54. 833-853 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Blanton, et al. (69 authors including S. Okamura): "The Luminosity Function of Galaxies in SDSS Commissioning Data"The Astronomical Journal. 121. 2358-2380 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Ouchi, et al. (13 authors including S. Okamura): "Clustering Properties of Galaxies at z4 in the Subaru/XMM Deep Survey Field"The Astrophysical Journal Letters. 558. L83-L86 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Shimasaku, et al. ( 17authors including S. Okamura): "Statistical Properties of Bright Galaxies in the SDSS Photometric System"The Astrophysical Journal. 122. 1238-1250 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] B.Mobasher, et al. (13 authors including S.Okamura): "A Photometric and Spectroscopic Study of Dwarf and Giant Galaxies in the Coma Cluster-II. Spectroscopic Observations"The Astrophysical Journal Suppl.. 137. 279-296 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] B.Poggianti, et al. (13 authors including S.Okamura): "A Photometric and Spectroscopic Study of Dwarf and Giant Galaxies in the Coma Cluster-III. Spectral Ages and Metallicities"The Astrophysical Journal. 562. 689-712 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Yoshida, et al. ( 20 authors including S.Okamura): "Discovery of Extremely Extended Ionized Gas around the Seyfert 2 Galaxy NGC 4388"The Astrophysical Journal. (in press). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] 岡村定矩 編著: "天文学への招待"朝倉書房. 212 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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