Science Context 2028

LISA and late-time cosmology in 2028

Filling the gap

NGC 1277 contains the most massive black holes known. Credit: NASA/ESA/A. C. Fabian/R. C. van den Bosch (MPIA)

Galaxy - NGC 1277

By 2028 our understanding of the way cosmological structures formed will have been dramatically improved. And LISA will fill the gap.

Improvements will have been made by high-redshift observations of quasi-stellar objects (QSOs) and protogalaxies from missions like the JWST, EUCLID and the Wide-Field Infrared Survey Telescope (WFIRST), and by the Atacama Large Millimeter/submillimeter Array (ALMA) on the ground.

These observations may well have constrained the supermassive black hole mass spectrum from a few times 1010 solar masses, or even higher, down to around 107 solar masses, but probably not into the main LISA range of 104 – 106 solar masses.

LISA observations will fill this gap and also provide a check on selection effects and other systematics of the electromagnetic observations. By measuring the mass and spins of massive black holes as a function of redshift out to z = 20 or so, LISA will greatly improve models of how ultra-massive black holes grow so quickly, and what roles accretion and mergers play in the growth of all massive black holes. LISA observations of mergers of 104 – 105 solar mass Black holes out to z = 20 can provide a strict test of the amount of growth by merger expected in these models.



no content specific images

no content specific videoclips found

no content specific sounds

No Scientific Papers

no content specific publications

No news attached to this article