36 citations · 128 across the 20 of their papers we have counts for
21 papers
Interstellar extinction of classical Cepheids from neighboring stars I. Methodology and application to 16 Galactic Cepheids
Wilma Kiviaho, Pierre Kervella, Mika Juvela +21
Galactic Cepheid variable stars are fundamental calibrators of the cosmic distance scale through their Period-Luminosity (PL) relation. The high-precision parallaxes expected from…
GIARPS simultaneous optical and infrared high-spectral-resolution observations of Cepheids I. Limb darkening from cross-correlated radial velocities
N. Nardetto, R. S. Rathour, M. C. Bailleul +17
The Baade-Wesselink method, while theoretically applicable for calibrating the distance scale via Cepheids, is not currently employed in the cosmic distance ladder. There are vario…
Multi-chromatic observations of classical Cepheids using the CHARA Array interferometer: Surface brightness-colour relation, projection factor, and limb-darkening
M. C. Bailleul, N. Nardetto, D. Mourard +28
The Baade-Wesselink (BW) method compares the linear and angular variations of Cepheids to derive their distance. This method is limited, however, by the projection factor, which re…
Pulsation periods reveal tension between theoretical and empirical radii for classical Cepheids in eclipsing binary systems
O. Ziółkowska, R. Smolec, R. Singh Rathour +1
Context. With their precisely determined physical parameters, classical Cepheids in eclipsing binary systems are often used to constrain stellar evolution and pulsation theories. T…
Toward a Comprehensive Grid of Cepheid Models with MESA. IV. Modest Effects of Rotation on Blue Loops
R. Smolec, R. Singh Rathour, V. Hocdé
Evolutionary tracks for stars, with metallicities of , , and , including rotation, are computed with Modules for Experiments in Stellar Astrophy…
V446 Cephei: a Cep pulsator in a multiple system
A. Moharana, J. Southworth, K. Pavlovski +7
Cep stars in eclipsing binary (EB) systems give us an opportunity to put observational constraints on their structure and stellar parameters. We present a comprehensive analysi…
Toward a Comprehensive Grid of Cepheid Models with MESA. III. Evolutionary and Pulsation Relations for Models with Core and Envelope Overshooting
R. Smolec, O. Ziółkowska, R. Singh Rathour +2
Evolutionary tracks for 2-8M models, covering a [Fe/H]=1.0 () to [Fe/H]=+0.2 () metallicity range are computed with Modules for Experiments in Stellar…
Reconstruction of Cepheid Radial Velocity Curves from the shape of the V-band Light Curves
V. Hocdé, P. Moskalik, N. Nardetto +17
This paper aims to develop the first method to reconstruct the shape of the RV curves of short-period fundamental-mode Cepheids, based exclusively on their pulsation period and the…
Toward a Comprehensive Grid of Cepheid Models with MESA II. Impact of Physical and Numerical Assumptions on Elemental Abundances
O. Ziółkowska, R. Smolec, A. Thoul +2
Modern tools for modeling stellar evolution, such as MESA (Modules for Experiments in Stellar Astrophysics), offer state-of-the-art implementations of stellar theories. However, th…
Non-evolutionary effects on period change in Magellanic Cepheids II. Empirical constraints on non-linear period changes
Rajeev Singh Rathour, Radosław Smolec, Gergely Hajdu +5
Classical Cepheids are not only excellent standard candles, but also invaluable tools to test stellar evolution and pulsation theories. Rates of their pulsation period change, quan…
Non-evolutionary effects on period change in Magellanic Cepheids
R. S. Rathour, R. Smolec, G. Hajdu +5
Classical Cepheids are a cornerstone class of pulsators, fundamental to testing stellar evolution and pulsation theories. Their secular period changes, characterized through …
Toward a Comprehensive Grid of Cepheid Models with MESA I. Uncertainties of the Evolutionary Tracks of Intermediate-Mass Stars
Oliwia Ziółkowska, Radosław Smolec, Anne Thoul +3
Helium-burning stars, in particular Cepheids, are especially difficult to model, as the choice of free parameters can greatly impact the shape of the blue loops - the part of the e…
Non-evolutionary effects on period change in Magellanic Cepheids I. New binary systems revealed from Light Travel Time Effect
Rajeev Singh Rathour, Gergely Hajdu, Radosław Smolec +5
Period change studies give a window to probe into the evolution and dynamics of Cepheids. While evolutionary period changes have been well studied both observationally and theoreti…
Pulsation modelling of the Cepheid Y Ophiuchi with RSP/MESA. Impact of the circumstellar envelope and a high projection factor on Baade-Wesselink method
V. Hocdé, R. Smolec, P. Moskalik +2
Y~Ophiuchi (Y~Oph) is a classical Cepheid reported to be as dim as a Cepheid of about half its pulsation period, and exhibits a low radial velocity and light-curves amplitude. Our…
Precise Fourier parameters of Cepheid Radial Velocity Curves
V. Hocdé, P. Moskalik, N. A. Gorynya +3
The primary goal of this paper is to derive precise Fourier parameters of the radial velocity (RV) curves for fundamental and first-overtone Galactic Cepheids. For each star, we ca…
Metallicity estimation of MW, SMC and LMC classical Cepheids from the shape of the - and -band light curves
V. Hocdé, R. Smolec, P. Moskalik +2
Estimating metallicity of classical Cepheids is of prime importance for studying metallicity effect on stellar evolution, chemical evolution of galaxies, and ultimately its impact…
Frequency analysis of OGLE-IV photometry for classical Cepheids in Galactic fields: non-radial modes and modulations
R. S. Rathour, R. Smolec, H. Netzel
We analyse photometry of 2000 Galactic Cepheids available in the OGLE Collection of Variable Stars. We analyse both Galactic disk and Galactic bulge fields; stars classified…
Discovery and timing of three millisecond pulsars in radio and gamma-rays with the GMRT and Fermi-LAT
B. Bhattacharyya, J. Roy, T. J. Johnson +14
We performed deep observations to search for radio pulsations in the directions of 375 unassociated Fermi Large Area Telescope (LAT) gamma-ray sources using the Giant Metrewave Rad…
Spectroscopic study of CEMP-(s & r/s) stars- Revisiting classification criteria and formation scenarios, highlighting i-process nucleosynthesis
Partha Pratim Goswami, Rajeev Singh Rathour, Aruna Goswami
We have derived the stellar atmospheric parameters, the effective temperature T, the microturbulent velocity , the surface gravity log g, and the metallicity [Fe/H] for…
Asteroseismology of the heartbeat star KIC 5006817
J. Merc, Cs. Kalup, R. S. Rathour +2
This paper summarizes the project work on asteroseismology at the ERASMUS+ GATE 2020 Summer school on space satellite data. The aim was to do a global asteroseismic analysis of KIC…
Characterizing the companion AGBs using surface chemical composition of barium stars
J. Shejeelammal, Aruna Goswami, Partha Pratim Goswami +2
Barium stars are one of the important probes to understand the origin and evolution of slow neutron-capture process elements in the Galaxy. These are extrinsic stars, where the obs…