English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The light curve parameters of the normal type Ia SN2011fe are derived fromthe rich archive of the AAVSO. This leads, together with the TRGB distancemodulus of (m-M) = 29.39 +/- 0.05 of the parent galaxy M101, to maximummagnitudes of the unreddened SN of M_B = -19.45 +/- 0.08, M_V = -19.46 +/-0.08, and M_I = -19.25 +/- 0.06 (for the standard decline rate of Delta m_15 =1.1). When these values are inserted into the Hubble line defined by 62 SNe Iawith 3000 < v < 20,000 km/s - and considering also four other SNe Ia with TRGBdistances - one obtains a large-scale value of the Hubble constant of H_0 =64.3 +/- 1.9 +/- 3.2. This value can be much improved in the future by usingonly TRGB distances of SNe Ia.

The supernova Ia 2011fe in M101, its tip of the red-giant branch (TRGB) distance, and the value of H_0