Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...236....9t&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 236, no. 1, Sept. 1990, p. 9-14. Research supported by SNSF.
Astronomy and Astrophysics
Astrophysics
60
Astrometry, Red Shift, Supernova Remnants, Supernovae, All Sky Photography, Astronomical Photometry, Cosmology, Hubble Diagram, Velocity Measurement
Scientific paper
An all-sky sample of 35 SNe Ia beyond 1000 km/sec and with well determined m(B)max are used to establish a Hubble diagram. With M(B)max = -19.79 + or - 0.12 from SNe Ia that occurred in the Virgo cluster (r = 21.9 Mpc), the diagram yields H0 = 46 + or - 10 (external error) km/sec Mpc. This value is independent of any adopted recession velocity of the Virgo cluster; it applies at an effective distance of about 2500 km/sec and therefore must be close to the global value. The scatter about the Hubble line is small, limiting the streaming velocities of field galaxies to about 500 km/sec over typical scales of 80 Mpc, and the luminosity scatter of SNe Ia to 0.25 mag or less. SNe Ia are therefore exceptionally good standard candles.
Leibundgut Bruno
Tammann Gustav A.
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