A 85 kpc Hα tail behind 2MASX J11443212+2006238 in A1367^⋆

¹ Università degli Studi di Milano-Bicocca, Piazza della Scienza 3, 20126 Milano, Italy
e-mail: giuseppe.gavazzi@mib.infn.it
² Optical and Infrared Astronomy Division, National Astronomical Observatory of Japan, Mitaka, 181-8588 Tokyo, Japan
e-mail: yagi.masafumi@nao.ac.jp
³ Graduate School of Science and Engineering, Hosei University, 3-7-2, Kajinocho, Koganei, 184-8584 Tokyo, Japan
⁴ Subaru Telescope, National Astronomical Observatory of Japan, National Institutes of Natural Sciences, 650 A’ohoku Place, Hilo, HI 96720, USA

Received: 14 June 2017
Accepted: 26 August 2017

Abstract

We report the detection of an Hα trail of 85 kpc projected length behind galaxy 2MASX J11443212+2006238 in the nearby cluster of galaxies Abell 1367. This galaxy was discovered to possess an extended component in earlier, deeper Hα observations carried out with the Subaru telescope. However, lying at the border of the Subaru field, the extended Hα tail was cut out, preventing the determination of its full extent. We fully map this extent here, albeit the shallower exposure.