Luminosities of High-Redshift Objects in an Accelerating Universe
| dc.creator | Enstrom, Daniel | |
| dc.creator | Fredriksson, Sverker | |
| dc.creator | Hansson, Johan | |
| dc.date | 1999-04-20 | |
| dc.date.accessioned | 2026-07-07T02:31:18Z | |
| dc.date.available | 2026-07-07T02:31:18Z | |
| dc.description | The results from the Supernova Cosmology Project indicate a relation between cosmic distance and redshift that corresponds to an accelerating Universe, and, as a consequence, the presence of an energy component with negative pressure. This necessitates a re-evaluation of such astrophysical luminosities that have been derived through conventional redshift analyses of, e.g., gamma-ray bursts and quasars. We have calculated corrected luminosity distances within two scenarios; the standard one with a non-zero cosmological constant, and the more recently proposed ``quintessence'', with a slowly evolving energy-density component. We find luminosity corrections from +30 to -40 per cent for redshifts with $z=0 - 10$. This finding implicates that the SCP data do not, by themselves, require a revision of the current, rather qualitative modeling of gamma-ray bursts and quasar properties. | |
| dc.description | RevTeX, 4 pages, 2 postscript figures, submitted to PRL | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9904262 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9904262 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/14107 | |
| dc.subject | Astrophysics | |
| dc.title | Luminosities of High-Redshift Objects in an Accelerating Universe | |
| dc.type | text |