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View article: New theoretical predictions on Type II Cepheids: towards a self consistent Pop. II distance scale
New theoretical predictions on Type II Cepheids: towards a self consistent Pop. II distance scale Open
Type II Cepheids are pulsating stars that can be used as standard candles for old stellar populations due to their characteristic Period-Luminosity and Period-Luminosity-Colour relations. They are traditionally divided in 3 sub-classes, na…
View article: Spatial Age Distribution of Classical Cepheids in Spiral Galaxies: The Cases of M31 and M33
Spatial Age Distribution of Classical Cepheids in Spiral Galaxies: The Cases of M31 and M33 Open
Classical Cepheids can be used as age indicators due to well-established period–age and period–age–color relations. G. De Somma et al. refined these relations by including a metallicity term and different mass–luminosity assumptions. In th…
View article: Spatial Age Distribution of Classical Cepheids in Spiral Galaxies: The Cases of M31 and M33
Spatial Age Distribution of Classical Cepheids in Spiral Galaxies: The Cases of M31 and M33 Open
Classical Cepheids can be used as age indicators due to well-established period-age and period-age-color relations. \citet{Desomma2021} refined these relations by including a metallicity term and different Mass-Luminosity assumptions. In t…
View article: Ultra-long-period Cepheids as Standard Candles from Gaia to Rubin-LSST
Ultra-long-period Cepheids as Standard Candles from Gaia to Rubin-LSST Open
An analysis of the properties of ultra-long-period Cepheids (ULPs) could significantly contribute to understanding the Hubble constant tension, e.g., the current discrepancy between determinations based on local distance indicators and tho…
View article: Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey
Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey Open
Context. Classical Cepheids (DCEPs) are crucial for calibrating the extragalactic distance ladder, ultimately enabling the determination of the Hubble constant through the period-luminosity ( PL ) and period-Wesenheit ( PW ) relations that…
View article: Light-curve Recovery with Rubin-LSST. II. Unveiling the Darkness of the Galactic Bulge (VESTALE) with RR Lyrae
Light-curve Recovery with Rubin-LSST. II. Unveiling the Darkness of the Galactic Bulge (VESTALE) with RR Lyrae Open
This work is part of VESTALE, a project initiated within the Legacy Survey of Space and Time (LSST) Cadence Strategy Optimization Process. Its goal is to explore the potential of Rubin-LSST observations aimed at the Galactic bulge (hencefo…
View article: The YMCA (Yes, Magellanic Clouds Again) survey: probing the outer regions of the Magellanic system with VST
The YMCA (Yes, Magellanic Clouds Again) survey: probing the outer regions of the Magellanic system with VST Open
The Magellanic Clouds (MCs) are the Milky Way's most massive dwarf satellites. As they also represent the closest pair of galaxies in an ongoing tidal interaction, while simultaneously infalling into the Milky Way halo, they provide a uniq…
View article: Synergies between Roman Galactic Plane Survey and other major surveys
Synergies between Roman Galactic Plane Survey and other major surveys Open
Nancy Grace Roman Space Telescope will revolutionize our understanding of the Galactic Bulge with its Galactic Bulge Time Domain survey. At the same time, Rubin Observatories's Legacy Survey of Space and Time (LSST) will monitor billions o…
View article: Light curve's recovery with Rubin-LSST: II. UnVEiling the darknesS of The gAlactic buLgE (VESTALE) with RR Lyrae
Light curve's recovery with Rubin-LSST: II. UnVEiling the darknesS of The gAlactic buLgE (VESTALE) with RR Lyrae Open
This work is part of VESTALE, a project initiated within the Rubin-LSST Cadence Strategy Optimization Process . Its goal is to explore the potential of Rubin-LSST observations aimed at the Galaxy's bulge (Bulge) for studying RR Lyrae stars…
View article: Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey: VI: Radial abundance gradients of 29 chemical species in the Milky Way Disk
Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey: VI: Radial abundance gradients of 29 chemical species in the Milky Way Disk Open
Classical Cepheids (DCEPs) are crucial for calibrating the extragalactic distance ladder, ultimately enabling the determination of the Hubble constant through the PL and PW relations they exhibit. Hence it's vital to understand how the PL …
View article: The Hertzsprung progression of classical Cepheids in the <i>Gaia</i> era
The Hertzsprung progression of classical Cepheids in the <i>Gaia</i> era Open
A new fine grid of non-linear convective pulsation models for the so-called ‘bump Cepheids’ is presented to investigate the Hertzprung progression (HP) phenomenon shown by their light and radial pulsation velocity curves. The period corres…
View article: The Hertzsprung progression of Classical Cepheids in the Gaia era
The Hertzsprung progression of Classical Cepheids in the Gaia era Open
A new fine grid of nonlinear convective pulsation models for the so-called "bump Cepheids" is presented to investigate the Hertzprung progression (HP) phenomenon shown by their light and radial pulsation velocity curves. The period corresp…
View article: Classical Cepheid pulsation properties in the Rubin-LSST filters
Classical Cepheid pulsation properties in the Rubin-LSST filters Open
Homogeneous multiwavelength observations of classical Cepheids from the forthcoming Rubin-LSST have the potential to significantly contribute to our understanding of the evolutionary and pulsation properties of these pulsating stars. Updat…
View article: Classical Cepheid Pulsation properties in the Rubin-LSST filters
Classical Cepheid Pulsation properties in the Rubin-LSST filters Open
Homogeneous multi-wavelength observations of classical Cepheids from the forthcoming Rubin-LSST have the potential to significantly contribute to our understanding of the evolutionary and pulsation properties of these pulsating stars. Upda…
View article: Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey
Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey Open
Context. The highly debated effect of metallicity on the absolute magnitudes of classical Cepheid variables needs to be properly quantified for determining accurate and precise distances based on their Leavitt Law. Aims. Our goal is to obt…
View article: Cepheid Metallicity in the Leavitt Law (C-MetaLL) Survey. V. New multiband (grizJHKs) Cepheid light curves and period-luminosity relations
Cepheid Metallicity in the Leavitt Law (C-MetaLL) Survey. V. New multiband (grizJHKs) Cepheid light curves and period-luminosity relations Open
We present homogeneous multiband (grizJHKs) time-series observations of 78 Cepheids including 49 fundamental mode variables and 29 first-overtone mode variables. These observations were collected simultaneously using the ROS2 and REMIR ins…
View article: First spectroscopic investigation of anomalous Cepheid variables
First spectroscopic investigation of anomalous Cepheid variables Open
Context. Anomalous Cepheids (ACEPs) are intermediate-mass metal-poor pulsators that are mostly discovered in dwarf galaxies of the Local Group. However, recent Galactic surveys, including the Gaia Data Release 3, found a few hundred ACEPs …
View article: Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey
Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey Open
Context. Classical Cepheids (DCEPs) play a fundamental role in the calibration of the extragalactic distance ladder, which eventually leads to the determination of the Hubble constant ( H 0 ) thanks to the period–luminosity (PL) and period…
View article: First spectroscopic investigation of Anomalous Cepheid variables
First spectroscopic investigation of Anomalous Cepheid variables Open
Anomalous Cepheids (ACEPs) are intermediate mass metal-poor pulsators mostly discovered in dwarf galaxies of the Local Group. However, recent Galactic surveys, including the Gaia DR3, found a few hundreds of ACEPs in the Milky Way. Their o…
View article: Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey: IV. The metallicity dependence of Cepheid Period-Luminosity relations
Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey: IV. The metallicity dependence of Cepheid Period-Luminosity relations Open
Classical Cepheids (DCEPs) play a fundamental role in the calibration of the extra-galactic distance ladder which eventually leads to the determination of the Hubble constant($H_0$) thanks to the period-luminosity ($PL$) and period-Wesenhe…
View article: Rubin Observatory LSST Transients and Variable Stars Roadmap
Rubin Observatory LSST Transients and Variable Stars Roadmap Open
The Vera C. Rubin Legacy Survey of Space and Time (LSST) holds the potential to revolutionize time domain astrophysics, reaching completely unexplored areas of the Universe and mapping variability time scales from minutes to a decade. To p…
View article: <i>Gaia</i>Data Release 3
<i>Gaia</i>Data Release 3 Open
Context. Gaia has been in operations since 2014, and two full data releases (DR) have been delivered so far: DR1 in 2016 and DR2 in 2018. The third Gaia data release expands from the early data release (EDR3) in 2020, which contained the f…
View article: Light-curve Recovery with the Vera Rubin Observatory’s LSST. I. Pulsating Stars in Local Group Dwarf Galaxies
Light-curve Recovery with the Vera Rubin Observatory’s LSST. I. Pulsating Stars in Local Group Dwarf Galaxies Open
This investigation is mainly focused on the LSST Survey Strategy Optimization process, a bottom-up approach that turned out to be quite effective in involving the scientific community in the definition of the LSST observing strategy. We ar…
View article: <i>Gaia</i>Data Release 3
<i>Gaia</i>Data Release 3 Open
Context. RR Lyrae stars are excellent tracers of the oldest stars (ages ≳ 9–10 Gyr) and standard candles for measuring the distance to stellar systems that are mainly composed of an old stellar population. The Gaia Third Data Release (DR3)…
View article: An Updated Metal-dependent Theoretical Scenario for Classical Cepheids
An Updated Metal-dependent Theoretical Scenario for Classical Cepheids Open
To properly quantify the possible residual systematic errors affecting the classical Cepheid distance scale, a detailed theoretical scenario is recommended. By extending the set of nonlinear, convective pulsation models published for Z = 0…
View article: Rubin Observatory LSST Transients and Variable Stars Roadmap
Rubin Observatory LSST Transients and Variable Stars Roadmap Open
The Vera C. Rubin Legacy Survey of Space and Time holds the potential to revolutionize time domain astrophysics, reaching completely unexplored areas of the Universe and mapping variability time scales from minutes to a decade. To prepare …
View article: KMHK 1762: Another star cluster in the Large Magellanic Cloud age gap
KMHK 1762: Another star cluster in the Large Magellanic Cloud age gap Open
Context. The star cluster (SC) age distribution of the Large Magellanic Cloud (LMC) exhibits a gap from ∼4 to 10 Gyr ago, with an almost total absence of SCs. Within this age gap, only two confirmed SCs have been identified hitherto. Nonet…
View article: New Theoretical Period–Luminosity–Metallicity Relations for RR Lyrae in the Rubin-LSST Filters
New Theoretical Period–Luminosity–Metallicity Relations for RR Lyrae in the Rubin-LSST Filters Open
The revolutionary power of future Rubin-LSST observations will allow us to significantly improve the physics of pulsating stars, including RR Lyrae. In this context, an updated theoretical scenario predicting all the relevant pulsation obs…
View article: <i>Gaia</i>Data Release 3
<i>Gaia</i>Data Release 3 Open
Context. Cepheids are pulsating stars that play a crucial role in several astrophysical contexts. Among the different types, the Classical Cepheids are fundamental tools for the calibration of the extragalactic distance ladder. They are al…