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Evidence for chromium hydride in the atmosphere of hot Jupiter WASP-31b
Chubb, Katy L.; Braam, Marrick; van der Tak, Floris F. S. +1 more
Context. The characterisation of exoplanet atmospheres has shown a wide diversity of compositions. Hot Jupiters have the appropriate temperatures to host metallic compounds, which should be detectable through transmission spectroscopy.
Aims: We aim to detect exotic species in the transmission spectra of hot Jupiters, specifically WASP-31b, by…
AU-scale radio imaging of the wind collision region in the brightest and most luminous non-thermal colliding wind binary Apep
Callingham, J. R.; Marcote, B.; De Becker, M. +5 more
The recently discovered colliding-wind binary (CWB) Apep has been shown to emit luminously from radio to X-rays, with the emission driven by a binary composed of two Wolf-Rayet (WR) stars of one carbon-sequence (WC8) and one nitrogen-sequence (WN4-6b). Mid-infrared imaging revealed a giant spiral dust plume that is reminiscent of a pinwheel nebula…
TRAO Survey of the Nearby Filamentary Molecular Clouds, the Universal Nursery of Stars (TRAO FUNS). II. Filaments and Dense Cores in IC 5146
Caselli, Paola; Kwon, Woojin; Soam, Archana +13 more
We present the results on the physical properties of filaments and dense cores in IC 5146, as a part of the TRAO FUNS project. We carried out on-the-fly mapping observations using the Taeduk Radio Astronomy Observatory (TRAO) 14 m telescope covering about 1 square degree of the area of IC 5146 using various molecular lines. We identified 14 filame…
PENELLOPE. II. CVSO 104: A pre-main sequence close binary with an optical companion in Ori OB1
Ábrahám, P.; Kóspál, Á.; Siwak, M. +14 more
We present the results of our study of the close pre-main sequence spectroscopic binary CVSO 104 in Ori OB1, based on data obtained within the PENELLOPE legacy program. We derive, for the first time, the orbital elements of the system and the stellar parameters of the two components. The system is composed of two early M-type stars and has an orbi…
Observational Evidence for Enhanced Black Hole Accretion in Giant Elliptical Galaxies
McNamara, Brian R.; Hickox, Ryan C.; Kara, Erin +5 more
We present a study of the relationship between black hole accretion rate (BHAR) and star formation rate (SFR) in a sample of giant elliptical galaxies. These galaxies, which live at the centers of galaxy groups and clusters, have star formation and black hole activity that is primarily fueled by gas condensing out of the hot intracluster medium. F…
Weak-lensing mass reconstruction using sparsity and a Gaussian random field
Starck, J. -L.; Peel, A.; Jeffrey, N. +2 more
Aims: We introduce a novel approach to reconstructing dark matter mass maps from weak gravitational lensing measurements. The cornerstone of the proposed method lies in a new modelling of the matter density field in the Universe as a mixture of two components: (1) a sparsity-based component that captures the non-Gaussian structure of the fiel…
A Broadband View on Microquasar MAXI J1820+070 during the 2018 Outburst
Tramacere, A.; Fiocchi, M.; Ubertini, P. +5 more
The microquasar MAXI J1820+070 went into outburst from 2018 mid-March until mid-July, with several faint rebrightenings afterward. With a peak flux of approximately 4 Crab in the 20-50 keV energy range, the source was monitored across the electromagnetic spectrum with detections from radio to hard X-ray frequencies. Using these multiwavelength obs…
Reconciling galaxy cluster shapes, measured by theorists versus observers
Massey, Richard; Rhodes, Jason; Jauzac, Mathilde +4 more
If properly calibrated, the shapes of galaxy clusters can be used to investigate many physical processes: from feedback and quenching of star formation, to the nature of dark matter. Theorists frequently measure shapes using moments of inertia of simulated particles'. We instead create mock (optical, X-ray, strong-, and weak-lensing) observations …
TOI-942b: A Prograde Neptune in a 60 Myr Old Multi-transiting System
Latham, David W.; Quinn, Samuel N.; Zhou, George +8 more
Mapping the orbital obliquity distribution of young planets is one avenue toward understanding mechanisms that sculpt the architectures of planetary systems. TOI-942 is a young field star, with an age of ~60 Myr, hosting a planetary system consisting of two transiting Neptune-sized planets in 4.3 and 10.1 day period orbits. We observed the spectro…
Discovery of a Highly Neutronized Ejecta Clump in the Type Ia Supernova Remnant 3C 397
Petre, Robert; Sato, Toshiki; Yamaguchi, Hiroya +7 more
The supernova remnant (SNR) 3C 397 is thought to originate from a Type Ia supernova (SN Ia) explosion of a near-Chandrasekhar-mass (MCh) progenitor, based on the enhanced abundances of Mn and Ni revealed by previous X-ray study with Suzaku. Here we report follow-up XMM-Newton observations of this SNR, conducted with the aim of investiga…