Journal Article

Multi-Slit Imaging Spectroscopy Technique: Catalog of Intracluster Planetary Nebulae in the Coma Cluster

Magda Arnaboldi, Ortwin Gerhard, Sadanori Okamura, Nobunari Kashikawa, Naoki Yasuda and Kenneth C. Freeman

in Publications of the Astronomical Society of Japan

Published on behalf of Astronomical Society of Japan

Volume 59, issue 2, pages 419-425
Published in print April 2007 | ISSN: 0004-6264
Published online April 2007 | e-ISSN: 2053-051X | DOI: http://dx.doi.org/10.1093/pasj/59.2.419
Multi-Slit Imaging Spectroscopy Technique: Catalog of Intracluster Planetary Nebulae in the Coma Cluster

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  • Astronomy and Astrophysics
  • Astronomical Instrumentation, Methods, and Techniques
  • Interstellar Medium

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With a new multi-slit imaging spectroscopy (MSIS) technique pioneered at the 8.2 m Subaru telescope and the Faint Object Camera and Spectrograph, we detect and measure the line-of-sight velocities of 40 intracluster planetary nebula candidates associated with the diffuse intracluster population of stars in the Coma cluster core, at nearly 100 Mpc distance. We describe the method for extracting the single two-dimensional spectra from the MSIS image, discuss the criteria for the identification of the emission line objects, and describe the procedure to compute their [math] (J2000) coordinates. We present the catalog of the intracluster planetary nebula candidates, their spatial location in the surveyed field, and their distribution in the velocity–magnitude plane. Finally, we comment on possible population effects and the use of these planetary nebulae to confirm the distance to the Coma cluster.

Keywords: catalogs; cosmology: galaxy clusters; planetary nebulae: general; methods: data analysis; techniques: image processing, spectroscopy

Journal Article.  5196 words.  Illustrated.

Subjects: Astronomy and Astrophysics ; Astronomical Instrumentation, Methods, and Techniques ; Interstellar Medium

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