Since the expansion of the universe was first established by Edwin Hubble and Georges
Lemaître about a century ago, the Hubble constant H_0 H 0 which measures its rate has …

We present an improved determination of the Hubble constant from Hubble Space
Telescope (HST) observations of 70 long-period Cepheids in the Large Magellanic Cloud …

We present year-long, near-infrared Hubble Space Telescope (HST) WFC3 observations
used to search for Mira variables in NGC 1559, the host galaxy of the Type Ia supernova (SN …

We present a calibration of the tip of the red giant branch (TRGB) in the Large Magellanic
Cloud (LMC) on the Hubble Space Telescope (HST)/ACS F814W system. We use archival …

ABSTRACT A key event in the history of the Milky Way is the formation of the bar. This event
affects the subsequent structural and dynamical evolution of the entire Galaxy. When the bar …

The number of known periodic variables has grown rapidly in recent years. Thanks to its
large field of view and faint limiting magnitude, the Zwicky Transient Facility (ZTF) offers a …

The separation of oxygen-and carbon-rich asymptotic giant branch sources is crucial for
their accurate use as local and cosmological distance and age/metallicity indicators. We …

Gaia DR3 parallaxes are used to calibrate preliminary period–luminosity relations of O-rich
Mira variables in the 2MASS J, H, and Ks bands using a probabilistic model accounting for …

The properties of the Milky Way's nuclear stellar disc give crucial information on the epoch of
bar formation. Mira variables are promising bright candidates to study the nuclear stellar …

The giant spiral galaxy M101 is host to the nearest recent Type Ia supernova (SN 2011fe)
and thus has been extensively monitored in the near-infrared to study the late-time light …