Search Publications
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…
AGN feedback in the Local Universe: Multiphase outflow of the Seyfert galaxy NGC 5506
Vallini, Livia; Alonso-Herrero, Almudena; Ricci, Claudio +21 more
We present new optical GTC/MEGARA seeing-limited (0.9″) integral-field observations of NGC 5506, together with ALMA observations of the CO(3 − 2) transition at a 0.2″ (∼25 pc) resolution. NGC 5506 is a luminous (bolometric luminosity of ∼1044 erg s−1) nearby (26 Mpc) Seyfert galaxy, part of the Galaxy Activity, Torus, and Out…
The Green Monster Hiding in Front of Cas A: JWST Reveals a Dense and Dusty Circumstellar Structure Pockmarked by Ejecta Interactions
Temim, Tea; Rest, Armin; Blair, William P. +27 more
JWST observations of the young Galactic supernova remnant Cassiopeia A revealed an unexpected structure seen as a green emission feature in colored composite MIRI F1130W and F1280W images—hence dubbed the Green Monster—that stretches across the central parts of the remnant in projection. Combining the kinematic information from NIRSpec and the MIR…
X-Ray and Multiwavelength Polarization of Mrk 501 from 2022 to 2023
Kaaret, Philip; Wu, Kinwah; Enoto, Teruaki +143 more
We present multiwavelength polarization measurements of the luminous blazar Mrk 501 over a 14 month period. The 2–8 keV X-ray polarization was measured with the Imaging X-ray Polarimetry Explorer (IXPE) with six 100 ks observations spanning from 2022 March to 2023 April. Each IXPE observation was accompanied by simultaneous X-ray data from NuSTAR,…