AAS Meeting #194 - Chicago, Illinois, May/June 1999
Session 39. Results from the HST Key Project on the Extragalactic Distance Scale
Topical, Oral, Tuesday, June 1, 1999, 8:30-10:00am, 10:45am-12:30pm, 2:30-4:00pm, International Ballroom South

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[39.07] Supernovae and Extragalactic Distance Scale

B. P. Schmidt (Research School of Astronomy and Astrophysics (MSSSO))

Supernovae (SN) have emerged over the past decade as powerful tools for measuring extragalactic distances. Type Ia SN provide relative distances as good as 6 been used to map the global expansion to z=1.2. Model Calculations for Type II and Type Ia SN have been used to measure distances to objects which are independent of all other rungs in the Cosmic Distance Ladder. Independent distances can also be extracted from angular size measurements of radio shells for SN which exhibit circumstellar interaction. I will review these methods which use SN to measure the H0, synthesizing the efforts of many groups with the following aims: To estimate the allowed values of H0 from supernovae; To discuss possible sources of systematic error; and to suggest future research which might better refine our measurements of the Hubble Constant.

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