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Updated Proper Motion of the Neutron Star in the Supernova Remnant Cassiopeia A
Holland-Ashford, Tyler; Slane, Patrick; Long, Xi
In this paper, we present updated estimates of the velocity of the neutron star (NS) in the supernova remnant Cassiopeia A using over two decades of Chandra observations. We use two methods: (1) recording the NS positions from dozens of Chandra observations, including the astrometric uncertainty estimates on the data points, but not correcting the…
CEERS Key Paper. IX. Identifying Galaxy Mergers in CEERS NIRCam Images Using Random Forests and Convolutional Neural Networks
Papovich, Casey; Yang, Guang; Finkelstein, Steven L. +32 more
A crucial yet challenging task in galaxy evolution studies is the identification of distant merging galaxies, a task that suffers from a variety of issues ranging from telescope sensitivities and limitations to the inherently chaotic morphologies of young galaxies. In this paper, we use random forests and convolutional neural networks to identify …
Optical- and UV-continuum Morphologies of Compact Radio Source Hosts
Worrall, D. M.; Morganti, R.; O'Dea, C. P. +6 more
We present the first systematic search for UV signatures from radio source-driven active galactic nuclei (AGN) feedback in Compact Steep Spectrum (CSS) radio galaxies. Owing to their characteristic sub-galactic jets (1–20 kpc projected linear sizes), CSS hosts are excellent laboratories for probing galaxy scale feedback via jet-triggered star form…
Study of X-ray emission from the S147 nebula with SRG/eROSITA: X-ray imaging, spectral characterization, and a multiwavelength picture
Khabibullin, Ildar; Churazov, Eugene; Sasaki, Manami +11 more
Simeis 147 (S147, G180.0-01.7, "Spaghetti nebula") is a supernova remnant (SNR) extensively studied across the entire electromagnetic spectrum, from radio to giga-electronvolt γ-rays, except in X-rays. Here, we report the first detection of significant X-ray emission from the entire SNR using data of the extended ROentgen Survey Imaging Telescope …
Searching for low-mass companions at small separations in transition disks with aperture masking interferometry
Garufi, A.; Sitko, M. L.; Johnstone, D. +9 more
Context. Transition disks have large central cavities that have been resolved by imaging surveys during recent years. Cavities and other substructures in circumstellar disks are often interpreted as signposts to massive companions. Detecting companions at small angular separations is challenging with coronagraphic imaging observations.
Aims: …
The Impact of Cometary "Impacts" on the Chemistry, Climate, and Spectra of Hot Jupiter Atmospheres
Walsh, C.; Sainsbury-Martinez, F.
Impacts from icy and rocky bodies have helped shape the composition of Solar System objects; for example, the Earth–Moon system, or the recent impact of comet Shoemaker–Levy 9 with Jupiter. It is likely that such impacts also shape the composition of exoplanetary systems. Here, we investigate how cometary impacts might affect the atmospheric compo…
Radiative and mechanical energies in galaxies. I. Contributions of molecular shocks and PDRs in 3C 326 N
Godard, B.; Guillard, P.; Pineau des Forêts, G. +1 more
Context. Atomic and molecular lines emitted from galaxies are fundamental tracers of the medium responsible for the emission and contain valuable information regarding the energy budget and the strength of the different feedback mechanisms.
Aims: The goal of this work is to provide a new framework for the interpretation of atomic and molecula…
The physical properties of T Pyx as measured by MUSE. I. The geometrical distribution of the ejecta and the distance to the remnant
Della Valle, M.; Pasquini, L.; Molaro, P. +8 more
Context. T Pyx is one of the most enigmatic recurrent novae, and it has been proposed as a potential Galactic type-Ia supernova progenitor.
Aims: Using spatially resolved data obtained with MUSE, we characterized the geometrical distribution of the material expelled in previous outbursts surrounding the white dwarf progenitor.
Methods: W…
The Baade-Wesselink projection factor of RR Lyrae stars. Calibration from OHP/SOPHIE spectroscopy and Gaia DR3 parallaxes
Mérand, Antoine; Breuval, Louise; Gieren, Wolfgang +10 more
Context. The application of the parallax-of-pulsation (PoP) technique to determine the distances of pulsating stars implies the use of a scaling parameter, namely the projection factor (p-factor), which is required to transform disc-integrated radial velocities (RVs) into photospheric expansion velocities. The value of this parameter is poorly kno…
A theoretical framework for BL Her stars. II. New period-luminosity relations in Gaia passbands
Marconi, Marcella; Ripepi, Vincenzo; Joyce, Meridith +6 more
Context. In the era of the Hubble tension, it is crucial to obtain a precise calibration of the period-luminosity (PL) relations of classical pulsators. Type II Cepheids (T2Cs; often exhibiting negligible or weak metallicity dependence on PL relations) used in combination with RR Lyraes and the tip of the red giant branch may prove useful as an al…