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View article: QUIJOTE scientific results XIX. New constraints on the synchrotron spectral index using a semi-blind component separation method
QUIJOTE scientific results XIX. New constraints on the synchrotron spectral index using a semi-blind component separation method Open
We introduce a novel approach to estimate the spectral index, $β_s$, of polarised synchrotron emission, combining the moment expansion of CMB foregrounds and the constrained-ILC method. We reconstruct the maps of the first two synchrotron …
View article: Consumo de Suplementos Alimentares entre praticantes de atividade física, dos 18 aos 30 anos, em um município do noroeste paulista
Consumo de Suplementos Alimentares entre praticantes de atividade física, dos 18 aos 30 anos, em um município do noroeste paulista Open
A busca pela superação, boa performance, estética e estilo de vida traz caminhos que divergem dos que garantem uma ingestão alimentar adequada, levando à procura por suplementos que podem oferecer “melhor e mais rápido” resultado. O consum…
View article: TOI-283 b: A transiting mini-Neptune in a 17.6-day orbit discovered with TESS and ESPRESSO
TOI-283 b: A transiting mini-Neptune in a 17.6-day orbit discovered with TESS and ESPRESSO Open
Super-Earths and mini-Neptunes are missing from our Solar System, yet they appear to be the most abundant planetary types in our Galaxy. A detailed characterization of key planets within this population is important for understanding the f…
View article: TOI-283 b: A transiting mini-Neptune in a 17.6-day orbit discovered with TESS and ESPRESSO
TOI-283 b: A transiting mini-Neptune in a 17.6-day orbit discovered with TESS and ESPRESSO Open
Context . Super-Earths and mini-Neptunes are missing from our Solar System, yet they appear to be the most abundant planetary types in our Galaxy. A detailed characterization of key planets within this population is important for understan…
View article: Spectral Properties of Anomalous Microwave Emission in 144 Galactic Clouds
Spectral Properties of Anomalous Microwave Emission in 144 Galactic Clouds Open
Anomalous Microwave Emission (AME) is a diffuse microwave component thought to arise from spinning dust grains, yet remains poorly understood. We analyze AME in 144 Galactic clouds by combining low-frequency maps from S-PASS (2.3 GHz), C-B…
View article: Mapping the Milky Way with Gaia BP/RP Spectra. III. The First Medium-resolution Follow-up Spectroscopy of Metal-poor Stars<sup>*</sup>
Mapping the Milky Way with Gaia BP/RP Spectra. III. The First Medium-resolution Follow-up Spectroscopy of Metal-poor Stars<sup>*</sup> Open
The Gaia BP/RP spectra provide an excellent opportunity to search for extremely metal-poor (EMP; [M/H] ≤ –3.0) stars. In this study, we assess the potential of our Gaia BP/RP-based candidate catalog, vetting newly identified EMP candidates…
View article: NIRPS and TESS reveal a peculiar system around the M dwarf TOI-756: A transiting sub-Neptune and a cold eccentric giant
NIRPS and TESS reveal a peculiar system around the M dwarf TOI-756: A transiting sub-Neptune and a cold eccentric giant Open
Context . The Near InfraRed Planet Searcher (NIRPS) joined HARPS on the 3.6-m ESO telescope at La Silla Observatory in April 2023, dedicating part of its Guaranteed Time Observations (GTO) program to the radial velocity follow-up of TESS p…
View article: Two warm Earth-sized exoplanets and an Earth-sized candidate in the M5V-M6V binary system TOI-2267
Two warm Earth-sized exoplanets and an Earth-sized candidate in the M5V-M6V binary system TOI-2267 Open
We report the discovery of two warm exoplanets orbiting the cool binary system TOI-2267, composed of the M5 (TOI-2267A) and M6 (TOI-2267B) stars, whose angular separation is 0.384 arcsec, corresponding to a projected distance of only about…
View article: Two warm Earth-sized exoplanets and an Earth-sized candidate in the M5V-M6V binary system TOI-2267
Two warm Earth-sized exoplanets and an Earth-sized candidate in the M5V-M6V binary system TOI-2267 Open
We report two warm Earth-sized exoplanets orbiting the close binary TOI-2267 (M5+M6, separation ~8 au). Data from TESS and ground-based facilities confirm the planets, but we cannot determine which star they orbit. The planets have radii o…
View article: A comprehensive study on radial velocity signals using ESPRESSO: Pushing precision to the 10 cm/s level
A comprehensive study on radial velocity signals using ESPRESSO: Pushing precision to the 10 cm/s level Open
Aims . We analyse ESPRESSO data for the stars HD 10700 ( τ Ceti), HD 20794 ( e Eridani), HD 102365, and HD 304636 acquired via its Guaranteed Time Observations (GTO) programme. We characterise the stars’ radial velocity (RV) signals down t…
View article: Hydride ion continuum hides absorption signatures in the NIRPS near-infrared transmission spectrum of the ultra-hot gas giant WASP-189b
Hydride ion continuum hides absorption signatures in the NIRPS near-infrared transmission spectrum of the ultra-hot gas giant WASP-189b Open
Context . Ultra-hot Jupiters showcase one-of-a-kind extreme atmospheric conditions, including the dissociation of molecules into atomic species, ionisation, and significant day-to-night temperature contrasts. The proximity to their host st…
View article: Diving into the planetary system of Proxima with NIRPS
Diving into the planetary system of Proxima with NIRPS Open
We obtained 420 high-resolution spectra of Proxima, over 159 nights, using the Near Infra Red Planet Searcher (NIRPS). We derived 149 nightly binned radial velocity measurements with a standard deviation of 1.69 ms −1 and a median uncertai…
View article: NIRPS detection of delayed atmospheric escape from the warm and misaligned Saturn-mass exoplanet WASP-69 b
NIRPS detection of delayed atmospheric escape from the warm and misaligned Saturn-mass exoplanet WASP-69 b Open
Context . Near-infrared high-resolution échelle spectrographs unlock access to fundamental properties of exoplanets, from their atmospheric escape and composition to their orbital architecture, which can all be studied simultaneously from …
View article: Mapping the Milky Way with Gaia Bp/Rp spectra
Mapping the Milky Way with Gaia Bp/Rp spectra Open
Context . Due to their nearly constant absolute magnitudes and old ages, blue horizontal branch (BHB) stars are frequently used as standard candles to study the kinematics and structures of our galaxy. The number of identified BHB stars ha…
View article: A comprehensive study on radial velocity signals using ESPRESSO: Pushing precision to the 10 cm/s level
A comprehensive study on radial velocity signals using ESPRESSO: Pushing precision to the 10 cm/s level Open
We analyse ESPRESSO data for the stars HD10700, HD20794, HD102365, and HD304636 acquired via its Guaranteed Time Observations (GTO) programme. We characterise the stars' radial velocity (RV) signals down to a precision of 10 cm/s on timesc…
View article: The ExoLife Finder (ELF) telescope project — a cutting-edge hybrid interferometer telescope explicitly designed for the high-contrast direct detection of exoplanets.
The ExoLife Finder (ELF) telescope project — a cutting-edge hybrid interferometer telescope explicitly designed for the high-contrast direct detection of exoplanets. Open
The ExoLife Finder (ELF) is a groundbreaking ground-based facility that will transform exoplanet research through direct imaging and characterisation of terrestrial exoplanets. Our mission is to identify biomarkers within their atmospheres…
View article: NIRPS joining HARPS at ESO 3.6 m
NIRPS joining HARPS at ESO 3.6 m Open
Context . The Near-InfraRed Planet Searcher (NIRPS) is a high-resolution, high-stability near-infrared (NIR) spectrograph equipped with an adaptive optics (AO) system. Installed on the ESO 3.6-m telescope at La Silla Observatory, Chile, it…
View article: Detection of Methane in the Closest Extreme Metal-poor T Dwarf WISEA J181006.18−101000.5*
Detection of Methane in the Closest Extreme Metal-poor T Dwarf WISEA J181006.18−101000.5* Open
WISEA J181006.18−101000.5 (WISE1810) is the nearest metal-poor ultracool dwarf to the Sun. It has a low effective temperature and has been classified as an extreme early-T subdwarf. However, methane, the characteristic molecule of the spec…
View article: Euclid Quick Data Release (Q1) Ultracool dwarfs in the Euclid Deep Field North
Euclid Quick Data Release (Q1) Ultracool dwarfs in the Euclid Deep Field North Open
Ultracool dwarfs (UCDs) encompass the lowest mass stars and brown dwarfs, defining the stellar substellar boundary. They have significant potential for advancing the understanding of substellar physics; however, these objects are challengi…
View article: Mapping the Milky Way with Gaia Bp/Rp spectra
Mapping the Milky Way with Gaia Bp/Rp spectra Open
Context. Gaia Bp/Rp spectrophotometry for over two hundred million stars has been publicly released as part of Gaia Data Release 3 (DR3). These data have great potential for mapping metallicity across the Milky Way. Several recent studies …
View article: HADES RV Programme with HARPS-N at TNG
HADES RV Programme with HARPS-N at TNG Open
The low masses of M dwarfs create attractive opportunities for exoplanet radial-velocity (RV) detections. These stars, however, exhibit strong stellar activity that may attenuate or mimic planetary signals. We present a velocimetric analys…
View article: Detection of binary companions below the diffraction limit with lucky imaging
Detection of binary companions below the diffraction limit with lucky imaging Open
We provide a technique for resolving intermediate-separation binaries stars with medium-sized telescopes (i.e. diameter less than or equal to 2.5 m) at wavelengths around 825 nm in the super-resolution range (i.e. below the limit defined b…
View article: Creating ground-based telescopes for imaging interferometry: SELF and ELF
Creating ground-based telescopes for imaging interferometry: SELF and ELF Open
View article: Optical constraints on the coldest metal-poor population
Optical constraints on the coldest metal-poor population Open
The coldest metal-poor population made of T and Y dwarfs are archaeological tracers of our Galaxy because they are very old and have kept the pristine material. The optical properties of these objects are important to characterise their at…
View article: A sub-Earth-mass planet orbiting Barnard’s star
A sub-Earth-mass planet orbiting Barnard’s star Open
A sub-Earth-mass planet orbiting Barnard’s star, designated as Barnard b, has recently been announced. At almost the same time, the first photometric data of Barnard’s star by the Transit Exoplanet Survey Satellite (TESS) was released in S…
View article: Mapping the Milky Way with Gaia Bp/Rp spectra I: Systematic flux corrections and atmospheric parameters for 68 million stars
Mapping the Milky Way with Gaia Bp/Rp spectra I: Systematic flux corrections and atmospheric parameters for 68 million stars Open
Gaia Bp/Rp spectra for over two hundred million stars have great potential for mapping metallicity across the Milky Way. We aim to construct an alternative catalog of atmospheric parameters from Gaia Bp/Rp spectra by fitting them with synt…
View article: Revisiting the multi-planetary system of the nearby star HD 20794
Revisiting the multi-planetary system of the nearby star HD 20794 Open
Context. Close-by Earth analogs and super-Earths are of primary importance because they will be preferential targets for the next generation of direct imaging instruments. Bright and close-by G-to-M type stars are preferential targets in r…
View article: A sub-Earth-mass planet orbiting Barnard’s star
A sub-Earth-mass planet orbiting Barnard’s star Open
Context. ESPRESSO guaranteed time observations (GTOs) at the 8.2m VLT telescope were performed to look for Earth-like exoplanets in the habitable zone of nearby stars. Barnard’s star is a primary target within the ESPRESSO GTO as it is the…
View article: A sub-Earth-mass planet orbiting Barnard's star: No evidence of transits in TESS photometry
A sub-Earth-mass planet orbiting Barnard's star: No evidence of transits in TESS photometry Open
A sub-Earth-mass planet orbiting Barnard's star, designated as Barnard b, has been recently announced. At almost the same time, the first photometric data of Barnard's star by the Transit Exoplanet Survey Satellite (TESS) was released in S…
View article: KISS: instrument description and performance
KISS: instrument description and performance Open
Kinetic inductance detectors (KIDs) have been proven as reliable systems for astrophysical observations, especially in the millimetre range. Their compact size enables to optimally fill the focal plane, thus boosting sensitivity. The KISS …