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A multi-planetary system orbiting the early-M dwarf TOI-1238
Nagel, E.; Amado, P. J.; Caballero, J. A. +53 more
Context. The number of super-Earth and Earth-mass planet discoveries has increased significantly in the last two decades thanks to the Doppler radial velocity and planetary transit observing techniques. Either technique can detect planet candidates on its own, but the power of a combined photometric and spectroscopic analysis is unique for an insi…
Morphokinematic modelling of the point-symmetric Cat's Eye, NGC 6543: Ring-like remnants of a precessing jet
Steffen, Wolfgang; Koning, Nico; Clairmont, Ryan
The planetary nebula known as the Cat's Eye Nebula (NGC 6543) has a complex, point-symmetric morphology that cannot be fully explained by the current theory of planetary nebula formation, the interacting stellar winds model. In order to reveal the 3D structure of the Cat's Eye Nebula, we created a detailed 3D morphokinematic model of this nebula u…
Is Terzan 5 the remnant of a building block of the Galactic bulge? Evidence from APOGEE
Cohen, Roger E.; Bizyaev, Dmitry; Pan, Kaike +16 more
It has been proposed that the globular cluster-like system Terzan 5 is the surviving remnant of a primordial building block of the Milky Way bulge, mainly due to the age/metallicity spread and the distribution of its stars in the α-Fe plane. We employ Sloan Digital Sky Survey data from the Apache Point Observatory Galactic Evolution Experiment to …
Identification of SRGt 062340.2-265751 as a bright, strongly variable, novalike cataclysmic variable
Maitra, Chandreyee; Wilms, Jörn; Buckley, David A. H. +10 more
We report the identification and follow-up of the transient SRGt 062340.2-265751 detected with both instruments on board the Spektrum-Roentgen-Gamma mission. Optical spectroscopy of the G = 12.5 counterpart firmly classifies the object as a novalike cataclysmic variable (CV) at a distance of 495 pc. A highly significant TESS period of 3.941 h, ten…
Pitch Angle Distribution of MeV Electrons in the Magnetosphere of Jupiter
Witasse, O.; Kollmann, P.; Nénon, Q. +3 more
The magnetosphere of Jupiter harbors the most extreme fluxes of MeV electrons in the solar system and therefore provides a testbed of choice to understand the origin, transport, acceleration, and loss of energetic electrons in planetary magnetospheres. Along this objective, the Pitch Angle Distribution (PAD) of energetic electrons may reveal signa…
3D-DASH: The Widest Near-infrared Hubble Space Telescope Survey
van Dokkum, Pieter G.; Franx, Marijn; Muzzin, Adam +15 more
The 3D-Drift And SHift (3D-DASH) program is a Hubble Space Telescope (HST) WFC3 F160W imaging and G141 grism survey of the equatorial COSMOS field. 3D-DASH extends the legacy of HST near-infrared imaging and spectroscopy to degree-scale swaths of the sky, enabling the identification and study of distant galaxies (z > 2) that are rare or in shor…
The complex globular cluster system of the S0 galaxy NGC 4382 in the outskirts of the Virgo Cluster
Cortesi, Arianna; Chies-Santos, Ana L.; Mendes de Oliveira, Claudia +10 more
NGC 4382 is a merger-remnant galaxy that has been classified as morphological type E2, S0, and even Sa. In this work, we performed a photometric and spectroscopic analysis of the globular cluster (GC) system of this peculiar galaxy in order to provide additional information about its history. We used a combination of photometric data in different …
The lively accretion disc in NGC 2992 - II. The 2019/2021 X-ray monitoring campaigns
Bianchi, S.; De Marco, B.; Matt, G. +8 more
We report on the short- and long-term X-ray properties of the bright nearby Seyfert 2 galaxy NGC 2992, which was extensively observed with Swift, XMM-Newton, and NuSTAR. Swift targeted the source more than 100 times between 2019 and 2021 in the context of two monitoring campaigns. Both time-averaged and time-resolved analyses are performed, and we…
Kiloparsec-scale Imaging of the CO(1-0)-traced Cold Molecular Gas Reservoir in a z 3.4 Submillimeter Galaxy
van der Werf, Paul; Walter, Fabian; Narayanan, Desika +9 more
We present a high-resolution study of the cold molecular gas as traced by CO(1-0) in the unlensed z ~ 3.4 submillimeter galaxy SMM J13120+4242, using multiconfiguration observations with the Karl G. Jansky Very Large Array (JVLA). The gas reservoir, imaged on 0.″39 (~3 kpc) scales, is resolved into two components separated by ~11 kpc with a total …
Li Distribution, Kinematics, and Detailed Abundance Analysis among Very Metal-poor Stars in the Galactic Halo from the HESP-GOMPA Survey
Beers, Timothy C.; Sivarani, Thirupathi; Pandey, Jeewan C. +3 more
We present a study on the detailed elemental abundances of newly identified, bright, very metal-poor stars with the detection of lithium, initially observed as part of the SDSS/MARVELS pre-survey. These stars were selected for high-resolution spectroscopic follow-up as part of the HESP-GOMPA survey. In this work, we discuss the Li abundances detec…