Figure: Pseudo-color GALEX ultraviolet image of the galaxy IC 3418 falling into the Virgo cluster. Notice the young star-forming clumps in its 55,000 light-years-long trail, as the galaxy moves towards the top-right area. Zooming into one of the blobs, marked by the arrow, the colour optical image from CFHT shows the bright Blue Supergiant star in the middle of the inset image in the top-left area. The optical spectrum from the same star (bottom-right area), which was obtained by Subaru Telescope's Faint Object Camera and Spectrograph (FOCAS), shows only one bright red emission line (H-alpha) due to the stellar wind and none of the other usual signs of star-forming regions. (Credit: NAOJ, CFHT, GALEX, Y. Ohyama & A. Hota)
- The research paper entitled "Discovery of a Possibly Single Blue Supergiant Star in the Intra-Cluster Region of Virgo Cluster of Galaxies" on which this article is based was published in the Astrophysical Journal Letters, Volume 767, No. 2.
- Three other galaxies similar to IC 3418 were discovered earlier by the Hubble Space Telescope, Subaru Telescope and GALEX. Refer to the following links for more information:
- Hubble Sees 'Comet Galaxy' Being Ripped Apart By Galaxy Cluster
(Hubble Space Telescope)
- Galaxy Ramming Through Space Creates Fireballs (Subaru Telescope)
- Astronomers Discover Star-Studded Galaxy Tail (GALEX)
This research was partially supported by the following:
- National Science Council of Taiwan (grant to Dr. Ohyama)
- National Centre for Radio Astrophysics of Tata Institute of Fundamental Research (NCRA-TIFR) and Inter-University Centre for Astronomy and Astrophysics (IUCAA), both in India (for Visiting Astronomer position to Dr. Hota).