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Gliese 12 b, a temperate Earth-sized planet at 12 parsecs discovered with TESS and CHEOPS
Vanderburg, Andrew; López-Morales, Mercedes; Latham, David W. +33 more
We report on the discovery of Gliese 12 b, the nearest transiting temperate, Earth-sized planet found to date. Gliese 12 is a bright (V = 12.6 mag, K = 7.8 mag) metal-poor M4V star only 12.162 ± 0.005 pc away from the Solar system with one of the lowest stellar activity levels known for M-dwarfs. A planet candidate was detected by TESS based on on…
First Constraints on the Interstellar Medium Conditions of a Low-mass, Highly Obscured z = 4.27 Main-sequence Galaxy
Murphy, Eric; McKinney, Jed; Whitaker, Katherine E. +4 more
We present the molecular gas content and interstellar medium conditions of MACS J0717_Az9, a strong gravitationally lensed z = 4.273, M * ≃ 2 × 109 M ⊙ star-forming galaxy with an unusually high (∼80%) obscured star formation fraction. We detect CO (4–3) in two independent lensed images, as well as [N II] 205 &micr…
Exploring the high-density reflection model for the soft excess in RBS 1124
Stern, D.; Fabian, A. C.; Hardcastle, M. J. +13 more
'Bare' active galactic nuclei (AGN) are a subclass of Type 1 AGN that show little or no intrinsic absorption. They offer an unobscured view of the central regions of the AGN and therefore serve as ideal targets to study the relativistic reflection features originating from the innermost regions of the accretion disc. We present a detailed broad-ba…
The galactic acceleration scale is imprinted on globular cluster systems of early-type galaxies of most masses and on red and blue globular cluster subpopulations
Hilker, Michael; Richtler, Tom; Renaud, Florent +3 more
Context. Globular clusters (GCs) carry information about the formation histories and gravitational fields of their host galaxies. It was found before that the radial profiles of the volume number density of GCs in GC systems (GCSs) follow broken power laws, while the breaks occur approximately at the a0 radii. These are the radii at whi…
Searching for globular clusters in the inner halo of the Circinus galaxy
Minniti, D.; Gómez, M.; Obasi, C. +3 more
In this study, we search for globular clusters (GCs) in the inner halo of the Circinus galaxy using a combination of observational data. Our data set includes observations from the VISTA Variables in the Vía Láctea Extended Survey (VVVX), optical data from Gaia Release 3 (DR3), and observations from the Dark Energy Camera (DECam). These multiple d…
The radio to GeV picture of PSR B1259-63 during the 2021 periastron passage
van Soelen, B.; Chernyakova, M.; Malyshev, D. +3 more
PSR B1259-63 is a gamma-ray binary system with a radio pulsar orbiting an O9.5Ve star, LS 2883, with a period of ${\sim} 3.4$ yr. Close to the periastron the system is detected at all wavelengths, from radio to the TeV energies. The emission in this time period is believed to originate from the interaction of LS 2883 and pulsar's outflows. The obs…
A Broad Set of Solar and Cosmochemical Data Indicates High C-N-O Abundances for the Solar System
Lunine, Jonathan I.; Glein, Christopher R.; Truong, Ngoc
We examine the role of refractory organics as a major C carrier in the outer protosolar nebula and its implications for the compositions of large Kuiper Belt objects (KBOs) and CI chondrites. By utilizing Rosetta measurements of refractory organics in comet 67P/Churyumov–Gerasimenko, we show that they would make up a large fraction of the protosol…
Observational bias and young massive cluster characterization - II. Can Gaia accurately observe young clusters and associations?
Naylor, Tim; Buckner, Anne S. M.; Rieder, Steven +2 more
Observations of clusters suffer from issues such as completeness, projection effects, resolving individual stars, and extinction. As such, how accurate measurements and conclusions are likely to be? Here, we take cluster simulations (Westerlund2- and Orion-type), synthetically observe them to obtain luminosities, accounting for extinction, and the…
Mind the gap between A2061 and A2067: Unveiling new diffuse, large-scale radio emission
Brunetti, G.; Balboni, M.; Venturi, T. +11 more
Aims. The clusters Abell 2061 and Abell 2067 in the Corona Borealis supercluster have been studied at different radio frequencies and are both known to host diffuse radio emission. The aim of this work is to investigate the radio emission between them, whose presence is suggested by low-resolution observations. Methods. We analysed deep LOw Freque…
Magnetically Aligned Striations in the L914 Filamentary Cloud
Fang, Min; Gong, Yan; Chen, Xuepeng +6 more
We present CO(J = 1–0) multiline observations toward the L914 dark cloud in the vicinity of the Cygnus X region, using the 13.7 m millimeter telescope of the Purple Mountain Observatory. The CO observations reveal in the L914 cloud a long filament with an angular length of ∼3.°6, corresponding to approximately 50 pc at the measured distance of ∼ 7…