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Measuring the Hubble Constant with Miras

1. In Huang et al. 2018 we used observations of NGC 4258, the water megamaser host galaxy to identify a sample of Miras and calibrate their absolute luminosity using the geometric megmaser distance. 

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2. In Huang et al. 2019 we followed up with observations of Miras in the host galaxy of Type Ia Supernova 2005df, NGC 1559, to obtain a fiducial SN Ia luminosity and a 5.5% measurement of the Hubble constant. 

Calibrating the M-sigma Relation
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I am also working on calibrating the supermassive black hole mass and bulge stellar velocity dispersion relation using archival STIS data and MUSE IFU.

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