Multi-slit imaging spectroscopy technique: Catalog of intracluster planetary nebulae in the coma cluster

作者：Arnaboldi Magda^*; Gerhard Ortwin; Okamura Sadanori; Kashikawa Nobunari; Yasuda Naoki; Freeman Kenneth C

来源：Publications of the Astronomical Society of Japan, 2007, 59(2): 419-425.

• catalog
• cosmology : galaxy clusters
• ISM : planetary nebulae : general
• methods : data analysis
• techniques : image processing, spectroscopy

With a new multi-slit imaging spectroscopy (MSIS) technique pioneered at the 8.2 in 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 alpha, delta (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.

• 出版日期2007
• 单位中国科学院国家天文台