(a) A Type la supernova is seen to occur in the central bulge of a spiral galaxy. At its peak, the total apparent magnitude of the bulge plus the supernova is V= 13.68. Pre-explosion images reveal the bulge alone to have a magnitude V = 14.21. Assuming that all Type Ia supernova have peak absolute visual magnitudes of My = -19.30, calculate the distance to this galaxy, assuming there is no extinction in the direction of the supernova. (b) Estimate the observed wavelength of the Hẞ line (rest-frame wavelength 486.1 nm) in this galaxy. Assume the Hubble constant has the value 67.4 kms ¹Mpc-¹
(a) A Type la supernova is seen to occur in the central bulge of a spiral galaxy. At its peak, the total apparent magnitude of the bulge plus the supernova is V= 13.68. Pre-explosion images reveal the bulge alone to have a magnitude V = 14.21. Assuming that all Type Ia supernova have peak absolute visual magnitudes of My = -19.30, calculate the distance to this galaxy, assuming there is no extinction in the direction of the supernova. (b) Estimate the observed wavelength of the Hẞ line (rest-frame wavelength 486.1 nm) in this galaxy. Assume the Hubble constant has the value 67.4 kms ¹Mpc-¹
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(a) A Type la supernova is seen to occur in the central bulge of a spiral galaxy. At its peak,
the total apparent magnitude of the bulge plus the supernova is V= 13.68. Pre-explosion
images reveal the bulge alone to have a magnitude V= 14.21. Assuming that all Type Ia
supernova have peak absolute visual magnitudes of My = -19.30, calculate the distance
to this galaxy, assuming there is no extinction in the direction of the supernova.
(b) Estimate the observed wavelength of the Hẞ line (rest-frame wavelength 486.1 nm) in
this galaxy. Assume the Hubble constant has the value 67.4 kms ¹Mpc-¹.
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