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Open cluster dissolution rate and the initial cluster mass function in the solar neighbourhood: Modelling the age and mass distributions of clusters observed by Gaia
Moitinho, André; Moreira, Sandro; Almeida, Duarte
Context. The dissolution rate of open clusters (OCs) and the integration of their stars into the Milky Way's field population have been explored using their age distribution. With the advent of the Gaia mission, there is an exceptional opportunity to revisit and enhance studies covering these aspects of OCs with ages and masses from high-quality d…
Unveiling dust, molecular gas, and high star-formation efficiency in extremely UV bright star-forming galaxies at z ∼ 2.1–3.6
Pérez-Fournon, I.; Schaerer, D.; Marques-Chaves, R. +4 more
We analysed the Atacama Large Millimetre/submillimetre Array (ALMA) far-infrared (FIR), 1.3 mm, dust continuum and CO emission of 12 starburst galaxies at z ∼ 2.1 ‑ 3.6 selected for their extreme brightness in the rest-frame UV, with absolute magnitudes of ‑23.4 to ‑24.7. We also analysed their Very Large Telescope (VLT) High Acuity Wide field K-b…
Calibration of Complementary Metal-oxide-semiconductor Sensor–based Photometry to a Few-millimagnitude Precision: The Case of the Mini-SiTian Array
Huang, Yang; Liu, Jifeng; Beers, Timothy C. +14 more
We present a pioneering achievement in the high-precision photometric calibration of CMOS-based photometry, by application of the Gaia Blue Photometer or Red Photometer (XP) spectra–based synthetic photometry method to the mini-SiTian array (MST) photometry. Through 79 repeated observations of the f02 field on the night, we find good internal cons…
Mapping the Milky Way with Gaia Bp/Rp spectra: I. Systematic flux corrections and atmospheric parameters for 68 million stars
Zhao, Gang; Chen, Yuqin; Aguado, David S. +8 more
Context. Gaia Bp/Rp spectrophotometry for over two hundred million stars has been publicly released as part of Gaia Data Release 3 (DR3). These data have great potential for mapping metallicity across the Milky Way. Several recent studies have analyzed this data set to derive atmospheric parameters and identify new metal-poor stars. In addition, s…
VLTI/GRAVITY enables the determination of the first dynamical masses of a classical Be + stripped and bloated pre-subdwarf binary
Rivinius, Th.; Baade, D.; Shenar, T. +7 more
Context. HR 6819 is the first post-mass transfer binary system composed of a classical Be star and a bloated pre-subdwarf stripped star directly confirmed by interferometry. While the Be star is already spun up to near-critical rotation and possesses a self-ejected viscous Keplerian disk, the stripped star is found in a short-lived evolutionary st…
A closer look at LTT 9779b:The ESPRESSO endeavour to pierce the atmospheric veil
Palle, E.; López-Morales, M.; Jenkins, J. S. +9 more
Context. The proliferation of exoplanet discoveries, particularly within such exotic environments as the Neptune desert, challenges our understanding of planetary atmospheres undergoing intense irradiation. The unexpected discovery of LTT 9779 b, an ultra-hot Neptune deep within this desert offers a prime opportunity for in-depth atmospheric studi…
PSR J1231–1411 Revisited: Pulse Profile Analysis of X-Ray Observation
Tao, Lian; Feng, Hua; Zhang, Shu +14 more
One of the primary goals of Neutron Star Interior Composition Explorer (NICER)-like X-ray missions is to impose stringent constraints on the neutron star equation of state by precisely measuring their masses and radii. NICER has recently expanded the data set of inferred mass–radius relations for neutron stars, including four rotation-powered mill…
A new look at the extragalactic very high energy sky: Searching for TeV-emitting candidates among the X-ray-bright, non-Fermi-detected blazar population
Marchesi, Stefano; Iuliano, Antonio; Prandini, Elisa +8 more
We present the results of a multiwavelength study of blazars selected from the fifth ROMABZCAT catalog. We selected from this sample a subsample of 2435 objects that have at least one counterpart in one of the three main archival X-ray catalogs, namely the fourth release of the XMM-Newton Survey Science Catalogue, the second release of the Chandra…
Segue 2 Recently Collided with the Cetus-Palca Stream: New Opportunities to Constrain Dark Matter in an Ultra-faint Dwarf
Conroy, Charlie; Price-Whelan, Adrian M.; Bonaca, Ana +7 more
Stellar streams in the Milky Way are promising detectors of low-mass dark matter (DM) subhalos predicted by ΛCDM. Passing subhalos induce perturbations in streams that indicate the presence of the subhalos. Understanding how known DM-dominated satellites impact streams is a crucial step toward using stream perturbations to constrain the properties…
The VMC Survey - LI. Classifying extragalactic sources using a probabilistic random forest supervised machine learning algorithm
Maitra, Chandreyee; Aird, James; de Grijs, Richard +10 more
We used a supervised machine learning algorithm (probabilistic random forest) to classify