Search Publications
The Hubble/STIS near-ultraviolet transmission spectrum of HD 189733 b
France, K.; Fossati, L.; Cubillos, P. E. +5 more
The benchmark hot Jupiter HD 189733 b has been a key target, used to lay out the foundations of comparative planetology for giant exo-planets. As such, HD 189733 b has been extensively studied across the electromagnetic spectrum. Here we report the observation and analysis of three transit light curves of HD 189733 b obtained with Hubble/STIS in t…
Molecules in the peculiar age-defying source IRAS 19312+1950
Zhang, Yong; Zhang, Jiang-Shui; Nakashima, Jun-ichi +5 more
Context. IRAS 19312+1950 is an isolated infrared source that exhibits a characteristic quasi-point-symmetric morphology in the near-and mid-infrared images and is also very bright in molecular radio lines. Because of its unique observational characteristics, various observational studies have been conducted and several hypotheses have been propose…
Supermassive black hole wake or bulgeless edge-on galaxy?
Trujillo, Ignacio; Montes, Mireia; Sánchez Almeida, Jorge
A recent paper reported the serendipitous discovery of a thin linear object interpreted as the trail of star-forming regions left behind by a runaway supermassive black hole (SMBH) kicked out from the center of a galaxy. Despite the undeniable interest in the idea, the actual physical interpretation is not devoid of difficulty. The wake of a SMBH …
Imaging and spectroscopic observations of extreme-ultraviolet brightenings using EUI and SPICE on board Solar Orbiter
Peter, H.; Chitta, L. P.; Solanki, S. K. +16 more
Context. The smallest extreme-ultraviolet (EUV) brightening events that were detected so far, called campfires, have recently been uncovered by the High Resolution EUV telescope (HRIEUV), which is part of the Extreme Ultraviolet Imager (EUI) on board Solar Orbiter. HRIEUV has a broad bandpass centered at 17.4 nm that is domin…
The GAPS programme at TNG. XLIV. Projected rotational velocities of 273 exoplanet-host stars observed with HARPS-N
Scandariato, G.; Poretti, E.; Rainer, M. +25 more
Context. The leading spectrographs used for exoplanets' search and characterization offer online data reduction softwares (DRS) that yield, as an ancillary result, the full-width at half-maximum (FWHM) of the cross-correlation function (CCF) that is used to estimate the radial velocity of the host star. The FWHM also contains information on the st…
The first massive compact companion in a wide orbit around a hot subdwarf star
Geier, S.; Heber, U.; Marsh, T. R. +5 more
We report the discovery of the first hot subdwarf B (sdB) star with a massive compact companion in a wide (P = 892.5 ± 60.2 d) binary system. It was discovered based on an astrometric binary solution provided by the Gaia mission Data Release 3. We performed detailed analyses of the spectral energy distribution (SED) as well as spectroscopic follow…
The miniJPAS and J-NEP surveys: Identification and characterization of the Lyα emitter population and the Lyα luminosity function at redshift 2.05 < z < 3.75
Hernán-Caballero, A.; Mendes de Oliveira, C.; Vázquez Ramió, H. +27 more
We present the Lyman-α (Lyα) luminosity function (LF) at 2.05 < z < 3.75, estimated from a sample of 67 Lyα-emitter (LAE) candidates in the Javalambre Physics of the Accelerating Universe Astronomical Survey (J-PAS) pathfinder surveys: miniJPAS and J-NEP. These two surveys cover a total effective area of ∼1.14 deg2 with 54 narrow …
Galactic ArchaeoLogIcaL ExcavatiOns (GALILEO). II. t-SNE portrait of local fossil relics and structures
Beers, Timothy C.; Minniti, Dante; Chiappini, Cristina +7 more
Based on high-quality Apache Point Observatory Galactic Evolution Experiment (APOGEE) DR17 and Gaia DR3 data for 1742 red giants stars within 5 kpc of the Sun and not rotating with the Galactic disk (Vϕ < 100 km s−1), we used the nonlinear technique of unsupervised analysis t-Distributed Stochastic Neighbor Embedding (t-SN…
An extreme-ultraviolet wave associated with the possible expansion of sheared arcades
Yang, Shuhong; Zhang, Liang; Chen, Yao +4 more
Context. Solar extreme-ultraviolet (EUV) waves are propagating disturbances in the corona, and they are usually accompanied with various solar eruptions, from large-scale coronal mass ejections to small-scale coronal jets.
Aims: Generally, it is believed that EUV waves are driven by the rapid expansion of coronal loops overlying the erupting …
Chemo-dynamical tagging in the outskirts: The origins of stellar substructures in the Magellanic Clouds
Monachesi, Antonela; Choi, Yumi; Majewski, Steven R. +12 more
We present the first detailed chemical analysis from APOGEE-2S observations of stars in six regions of recently discovered substructures in the outskirts of the Magellanic Clouds extending to 20° from the Large Magellanic Cloud (LMC) center. We also present, for the first time, the metallicity and α-abundance radial gradients of the LMC and the Sm…