Search Publications
Missions
Journals
Publication Years
Chemical Diagnostics to Unveil Environments Enriched by First Stars
Cupani, Guido; D'Odorico, Valentina; Becker, George D. +2 more
Unveiling the chemical fingerprints of the first (Population III, hereafter Pop III) stars is crucial for indirectly studying their properties and probing their massive nature. In particular, very massive Pop III stars explode as energetic pair-instability supernovae (PISNe), allowing their chemical products to escape in the diffuse medium around …
Planetary perturbers: flaring star-planet interactions in Kepler and TESS
Ilin, Ekaterina; Alvarado-Gómez, Julián D.; Poppenhäger, Katja +2 more
In many star-planet systems discovered so far, the innermost planet orbits within only a few stellar radii. In these systems, planets could become in situ probes of the extended stellar magnetic field. Because they disturb the field as they move, they are expected to trigger flares in the corona. Potential differences to the energies and morpholog…
Transient fading X-ray emission detected during the optical rise of a tidal disruption event
Liu, Z.; Merloni, A.; Rau, A. +9 more
We report on the SRG/eROSITA detection of ultra-soft ($kT=47^{+5}_{-5}$ eV) X-ray emission (LX =$2.5^{+0.6}_{-0.5} \times 10^{43}$ erg s-1) from the tidal disruption event (TDE) candidate AT 2022dsb ~14 d before peak optical brightness. As the optical luminosity increases after the eROSITA detection, then the 0.2-2 keV observ…
Dracula's Chivito: Discovery of a Large Edge-on Protoplanetary Disk with Pan-STARRS
Drake, Jeremy J.; Bayyari, Ammar; Russell, Ray W. +6 more
We report the serendipitous discovery of a large edge-on protoplanetary disk in Pan-STARRS (PS1) images. PS1 has five broadband filters designated as g P1, r P1, i P1, z P1, and y P1 with mean wavelengths 4866, 6215, 7545, 8679, and 9633 Å, respectively. The disk's apparent size in the PS1 ima…
AMICO-COSMOS galaxy cluster and group catalogue up to z = 2: Sample properties and X-ray counterparts
Finoguenov, A.; Castignani, G.; Moscardini, L. +2 more
Aims: We present the results of a new galaxy cluster search in the COSMOS field obtained using the Adaptive Matched Identifier of Clustered Objects (AMICO). Our aim was to produce a new cluster and group catalogue up to z = 2 by performing an innovative application of AMICO with respect to previous successful applications to wide-field survey…
Improved modelling of SEP event onset within the WSA-Enlil-SEPMOD framework
Richardson, Ian G.; Auster, Hans-Ulrich; Palmerio, Erika +14 more
Multi-spacecraft observations of solar energetic particle (SEP) events not only enable a deeper understanding and development of particle acceleration and transport theories but also provide important constraints for model validation efforts. However, because of computational limitations, a given physics-based SEP model is usually best suited to c…
JWST/NIRCam Imaging of Young Stellar Objects. II. Deep Constraints on Giant Planets and a Planet Candidate Outside of the Spiral Disk Around SAO 206462
Dong, Ruobing; Wolff, Schuyler G.; Johnstone, Doug +17 more
We present JWST/NIRCam F187N, F200W, F405N, and F410M direct imaging data of the disk surrounding SAO 206462. Previous images show a very structured disk, with a pair of spiral arms thought to be launched by one or more external perturbers. The spiral features are visible in three of the four filters, with the nondetection in F410M due to the larg…
The Next Step in Galaxy Cluster Strong Lensing: Modeling the Surface Brightness of Multiply Imaged Sources
Acebron, Ana; Nonino, Mario; Grillo, Claudio +12 more
Overcoming both modeling and computational challenges, we present, for the first time, the extended surface-brightness distribution model of a strongly lensed source in a complex galaxy-cluster-scale system. We exploit the high-resolution Hubble Space Telescope (HST) imaging and extensive Multi Unit Spectroscopic Explorer spectroscopy to build an …
The EBLM Project XII. An eccentric, long-period eclipsing binary with a companion near the hydrogen-burning limit
Trifonov, Trifon; Henning, Thomas; Triaud, Amaury H. M. J. +17 more
In the hunt for Earth-like exoplanets, it is crucial to have reliable host star parameters, as they have a direct impact on the accuracy and precision of the inferred parameters for any discovered exoplanet. For stars with masses between 0.35 and 0.5 M⊙, an unexplained radius inflation is observed relative to typical stellar models. How…
Gaia FGK benchmark stars: Fundamental Teff and log g of the third version
Casamiquela, L.; Creevey, O. L.; Soubiran, C. +8 more
Context. Large spectroscopic surveys devoted to the study of the Milky Way, including Gaia, use automated pipelines to determine the atmospheric parameters of millions of stars. The Gaia FGK benchmark stars are reference stars with Teff and log 𝑔 derived through fundamental relations, independently of spectroscopy, to be used as anchors…