EXTRAGALACTIC SETI: THE TULLY-FISHER RELATION AS A PROBE OF DYSONIAN ASTROENGINEERING IN DISK GALAXIES

• Published in: The Astrophysical journal Vol. 810; no. 1; pp. 23 - 12
• Main Authors: Zackrisson, Erik, Calissendorff, Per, Asadi, Saghar, Nyholm, Anders
• Format: Journal Article
• Language: English
• Published: United Kingdom The American Astronomical Society 01.09.2015
• Subjects: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; Disk galaxies; Extraterrestrial environments; extraterrestrial intelligence; GALAXIES; galaxies: spiral; galaxies: stellar content; Infrared; INFRARED SPECTRA; infrared: galaxies; INTERGALACTIC SPACE; LUMINOSITY; Optical properties; Stands; UNIVERSE

ABSTRACT If advanced extraterrestrial civilizations choose to construct vast numbers of Dyson spheres to harvest radiation energy, this could affect the characteristics of their host galaxies. Potential signatures of such astroengineering projects include reduced optical luminosity, boosted infrared...