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Converging on the Cepheid Metallicity Dependence: Implications of Non-Standard Gaia Parallax Recalibration on Distance Measures
Louise Breuval, Gagandeep S. Anand, Richard I. Anderson +20
By comparing Cepheid brightnesses with geometric distance measures including Gaia EDR3 parallaxes, most recent analyses conclude metal-rich Cepheids are brighter, quantified as $γ\…
An Improved Calibration of the Wavelength Dependence of Metallicity on the Cepheid Leavitt law
Louise Breuval, Adam G. Riess, Pierre Kervella +2
The Cepheid period-luminosity (PL) relation (or Leavitt law) has served as the first rung of the most widely used extragalactic distance ladder and is central to the determination…
Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey: I. HARPS-N@TNG spectroscopy of 47 Classical Cepheid and 1 BL Her variables
V. Ripepi, G. Catanzaro, R. Molinaro +11
Classical Cepheids (DCEPs) are the most important primary indicators of the extragalactic distance scale. Establishing the dependence on metallicity of their period--luminosity and…
A Synoptic View of the Magellanic Clouds: VMC, Gaia, and Beyond
Maria-Rosa L. Cioni, Martino Romaniello, Richard I. Anderson
The year 2019 marked the quincentenary of the arrival in the southern hemisphere of Ferdinand Magellan, the namesake of the Magellanic Clouds, our nearest example of dwarf galaxies…
First metallicity determination from Near-Infrared spectra for five obscured Cepheids discovered in the inner Disk
L. Inno, M. A. Urbaneja, N. Matsunaga +9
We report the discovery from our IRSF/SIRIUS Near-Infrared (NIR) variability survey of five new classical Cepheids located in the inner Galactic Disk, at longitude $l\simeq -40^{\c…
Detailed chemical composition of classical Cepheids in the LMC cluster NGC 1866 and in the field of the SMC
B. Lemasle, M. A. T. Groenewegen, E. K. Grebel +11
Context: Cepheids are excellent tracers of young stellar populations. They play a crucial role in astrophysics as standard candles. The chemistry of classical Cepheids in the Milky…