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View article: Gravity-darkening Exponents for MESA Stellar Evolution Models
Gravity-darkening Exponents for MESA Stellar Evolution Models Open
In this Research Note we present new gravity-darkening exponents ( β ) for several stellar evolution models from the zero-age main sequence up to the giant phase. The models were computed using the Modules for Experiments in Stellar Astrop…
View article: SVOM GRB 250314A at z $\simeq$ 7.3: an exploding star in the era of reionization
SVOM GRB 250314A at z $\simeq$ 7.3: an exploding star in the era of reionization Open
Most long Gamma-ray bursts originate from a rare type of massive stellar explosion. Their afterglows, while rapidly fading, can be initially extremely luminous at optical/near-infrared wavelengths, making them detectable at large cosmologi…
View article: Limb-darkening coefficients for four-term and power-2 laws for the JWST mission adopting spherical PHOENIX models at high resolution
Limb-darkening coefficients for four-term and power-2 laws for the JWST mission adopting spherical PHOENIX models at high resolution Open
Aims. Modeling observations of transiting exoplanets or close binary systems by comparing the observations with theoretical light curves requires precise knowledge of the distribution of specific intensities across the stellar disk. We aim…
View article: An approach to the effects of stellar rotation on the theoretical apsidal motion constants
An approach to the effects of stellar rotation on the theoretical apsidal motion constants Open
Aims. The most reliable sources for determining absolute stellar parameters are the double-lined eclipsing binary systems. Some of these systems also show apsidal motion, characterized by the variable log k 2 . This point grants us the pos…
View article: Power-2 limb-darkening coefficients for the $uvby$, $UBVRIJHK$, SDSS $ugriz$, Gaia, Kepler, TESS, and CHEOPS photometric systems II. PHOENIX spherically symmetric stellar atmosphere models
Power-2 limb-darkening coefficients for the $uvby$, $UBVRIJHK$, SDSS $ugriz$, Gaia, Kepler, TESS, and CHEOPS photometric systems II. PHOENIX spherically symmetric stellar atmosphere models Open
Multiple parametric limb-darkening laws have been presented, and there are many available sources of theoretical limb-darkening coefficients (LDCs) calculated using stellar model atmospheres. The power-2 limb-darkening law allows a very go…
View article: Theoretical tidal evolution constants for stellar models from the pre-main sequence to the white dwarf stage
Theoretical tidal evolution constants for stellar models from the pre-main sequence to the white dwarf stage Open
Aims. One of the most reliable means of studying the stellar interior is through the apsidal motion in double line eclipsing binary systems since these systems present errors in masses, radii, and effective temperatures of only a few per c…
View article: Power-2 limb-darkening coefficients for the <i>uvby</i>, <i>UBVRIJHK</i>, SDSS <i>ugriz</i>, <i>Gaia</i>, <i>Kepler</i>, TESS, and CHEOPS photometric systems
Power-2 limb-darkening coefficients for the <i>uvby</i>, <i>UBVRIJHK</i>, SDSS <i>ugriz</i>, <i>Gaia</i>, <i>Kepler</i>, TESS, and CHEOPS photometric systems Open
Context . The phenomenon of limb-darkening is relevant to many topics in astrophysics, including the analysis of light curves of eclipsing binaries, optical interferometry, measurement of stellar diameters, line profiles of rotating stars,…
View article: Limb-darkening Coefficients for the Filter CBB
Limb-darkening Coefficients for the Filter CBB Open
The CBB filter is particularly appropriate for exoplanet differential photometry using smaller (≤1.0 m) telescopes for two primary reasons. First, the CBB filter provides far greater throughput than standard filters (i.e., 92% throughput f…
View article: Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, and TESS photometric systems
Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, and TESS photometric systems Open
Limb darkening is an important stellar phenomenon and must be accounted for in the study of stellar spectra, eclipsing binaries, transiting planetary systems, and microlensing events. The power-2 limb-darkening law provides a good match to…
View article: Exploratory scenarios for the differential nuclear and tidal evolution of TZ Fornacis
Exploratory scenarios for the differential nuclear and tidal evolution of TZ Fornacis Open
Aims. TZ Fornacis is a double-lined eclipsing binary system with similar masses (2.057 ± 0.001 and 1.958 ± 0.001 M ⊙ ) but characterized by very different radii (8.28 ± 0.22 and 3.94 ± 0.17 R ⊙ ). This similarity in terms of mass makes it …
View article: Power-2 limb-darkening coefficients for the <i>uvby, UBVRIJHK</i>, SDSS <i>ugriz, Gaia, Kepler</i>, and TESS photometric systems
Power-2 limb-darkening coefficients for the <i>uvby, UBVRIJHK</i>, SDSS <i>ugriz, Gaia, Kepler</i>, and TESS photometric systems Open
Context. Limb darkening is an important stellar phenomenon and must be accounted for in the study of stellar spectra, eclipsing binaries, transiting planetary systems, and microlensing events. The power-2 limb-darkening law provides a good…
View article: Rapidly rotating stars and their transiting planets: KELT-17b, KELT-19Ab, and KELT-21b in the <i>CHEOPS</i> and <i>TESS</i> era
Rapidly rotating stars and their transiting planets: KELT-17b, KELT-19Ab, and KELT-21b in the <i>CHEOPS</i> and <i>TESS</i> era Open
Rapidly rotating early-type main-sequence stars with transiting planets are interesting in many aspects. Unfortunately, several astrophysical effects in such systems are not well understood yet. Therefore, we performed a photometric mini-s…
View article: Is the orbit of the exoplanet WASP-43b really decaying? <i>TESS</i> and MuSCAT2 observations confirm no detection
Is the orbit of the exoplanet WASP-43b really decaying? <i>TESS</i> and MuSCAT2 observations confirm no detection Open
Up to now, WASP-12b is the only hot Jupiter confirmed to have a decaying orbit. The case of WASP-43b is still under debate. Recent studies preferred or ruled out the orbital decay scenario, but further precise transit timing observations a…
View article: High-precision photometry with Ariel
High-precision photometry with Ariel Open
View article: Analysis of apsidal motion in eclipsing binaries using TESS data
Analysis of apsidal motion in eclipsing binaries using TESS data Open
Context. The measurement of apsidal motion rates in eccentric eclipsing binaries is a unique way to gain insight into the internal structure of stars through the internal density concentration parameter, k 2 . High-quality physical paramet…
View article: Analysis of apsidal motion in eclipsing binaries using TESS data II. A test of internal stellar structure}
Analysis of apsidal motion in eclipsing binaries using TESS data II. A test of internal stellar structure} Open
We have determined the apsidal motion rate of 27 double-lined eclipsing binaries with precise physical parameters. The obtained values, corrected for their relativistic contribution, yield precise empirical parameters of the internal stell…
View article: Evaluation of dry-cured ham pastiness through rheological measurements of aqueous extracts obtained in vitro mimicking the mastication process
Evaluation of dry-cured ham pastiness through rheological measurements of aqueous extracts obtained in vitro mimicking the mastication process Open
View article: Analysis of apsidal motion in eclipsing binaries using TESS data
Analysis of apsidal motion in eclipsing binaries using TESS data Open
Context. The change in the argument of periastron of eclipsing binaries, that is, the apsidal motion caused by classical and relativistic effects, can be measured from variations in the difference between the time of minimum light of the p…
View article: Analysis of apsidal motion in eclipsing binaries using TESS data: I. A test of gravitational theories
Analysis of apsidal motion in eclipsing binaries using TESS data: I. A test of gravitational theories Open
The change in the argument of periastron of eclipsing binaries, i.e., the apsidal motion caused by classical and relativistic effects, can be measured from variations in the difference between the time of minimum light of the primary and s…
View article: Rotationally and tidally distorted compact stars A theoretical approach to the gravity-darkening exponents for white dwarfs
Rotationally and tidally distorted compact stars A theoretical approach to the gravity-darkening exponents for white dwarfs Open
To the best of our knowledge, there are no specific calculations of gravity-darkening exponents for white dwarfs in the literature. On the other hand, the number of known eclipsing binaries whose components are tidally and/or rotationally …
View article: Rotationally and tidally distorted compact stars
Rotationally and tidally distorted compact stars Open
Context. To the best of our knowledge, there are no specific calculations of gravity-darkening exponents for white dwarfs in the literature. On the other hand, the number of known eclipsing binaries whose components are tidally and/or rota…
View article: Limb and Gravity-darkening Coefficients for the Space Mission CHEOPS
Limb and Gravity-darkening Coefficients for the Space Mission CHEOPS Open
The goal of this Research Note is to provide the theoretical calculations of the limb-darkening coefficients and gravity-darkening coefficients (GDC) for the space mission CHEOPS . We use two stellar atmosphere models: ATLAS (plane-paralle…
View article: The widest broadband transmission spectrum (0.38–1.71<i>μ</i>m) of HD 189733b from ground-based chromatic Rossiter–McLaughlin observations
The widest broadband transmission spectrum (0.38–1.71<i>μ</i>m) of HD 189733b from ground-based chromatic Rossiter–McLaughlin observations Open
Multiband photometric transit observations (spectro-photometric) have been used mostly so far to retrieve broadband transmission spectra of transiting exoplanets in order to study their atmospheres. An alternative method was proposed, and …
View article: Doppler beaming factors for white dwarfs, main sequence stars, and giant stars
Doppler beaming factors for white dwarfs, main sequence stars, and giant stars Open
Context. Systematic theoretical calculations of Doppler beaming factors are scarce in the literature, particularly in the case of white dwarfs. Additionally, there are no specific calculations for the limb-darkening coefficients of 3D whit…
View article: Doppler beaming factors for white dwarfs, main sequence stars, and giant stars Limb-darkening coefficients for 3D (DA and DB) white dwarf models
Doppler beaming factors for white dwarfs, main sequence stars, and giant stars Limb-darkening coefficients for 3D (DA and DB) white dwarf models Open
We computed Doppler beaming factors for DA, DB, and DBA white dwarf models, as well as for main sequence and giant stars covering the transmission curves of the Sloan, UBVRI, HiPERCAM, Kepler, TESS, and Gaia photometric systems. The calcul…
View article: ExoTETHyS: Tools for Exoplanetary Transits around host stars
ExoTETHyS: Tools for Exoplanetary Transits around host stars Open
G. M., M. M.-L. and P.-O. L. were supported by the LabEx P2IO, the French ANR contract
\n05-BLANNT09-573739 and the European Unions Horizon 2020 Research and Innovation Programme, under Grant Agreement N 776403. G.M. also acknowledges the …
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
Context. Teegarden’s Star is the brightest and one of the nearest ultra-cool dwarfs in the solar neighbourhood. For its late spectral type (M7.0 V), the star shows relatively little activity and is a prime target for near-infrared radial v…
View article: The CARMENES search for exoplanets around M dwarfs. Two temperate Earth-mass planet candidates around Teegarden's Star
The CARMENES search for exoplanets around M dwarfs. Two temperate Earth-mass planet candidates around Teegarden's Star Open
Context. Teegarden's Star is the brightest and one of the nearest ultra-cool dwarfs in the solar neighbourhood. For its late spectral type (M7.0V), the star shows relatively little activity and is a prime target for near-infrared radial ve…
View article: A new method to compute limb-darkening coefficients for stellar atmosphere models with spherical symmetry: the space missions TESS, Kepler, CoRoT, and MOST
A new method to compute limb-darkening coefficients for stellar atmosphere models with spherical symmetry: the space missions TESS, Kepler, CoRoT, and MOST Open
\nAims. One of the biggest problems we can encounter while dealing with the limb-darkening coefficients for stellar atmospheric models with spherical symmetry is the difficulty of adjusting both the limb and the central parts simultaneousl…
View article: CARMENES: high-resolution spectra and precise radial velocities in the red and infrared
CARMENES: high-resolution spectra and precise radial velocities in the red and infrared Open
The CARMENES instrument has been operational at the 3.5 m telescope of Calar Alto Observatory since January 2016. It consists of two cross-dispersed ´echelle spectrographs covering the wavelength range from 0.52 to 1.71 µm. CARMENES is cur…