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Model-independent reconstruction of UV luminosity function and reionization epoch
Hazra, Dhiraj Kumar; Adak, Debabrata; Mitra, Sourav +1 more
We conduct a first comprehensive study of the Luminosity Function (LF) using a non-parametric approach. We use Gaussian Process to fit available luminosity data between redshifts z ∼ 2-8. Our free-form LF in the non-parametric approach rules out the conventional Schechter function model to describe the abundance-magnitude relation at redshifts z=3…
Structure and large-scale environment of galaxy pairs in the S-PLUS DR4
Schoenell, W.; Kanaan, A.; Ribeiro, T. +8 more
In this paper, we use photometric data from the Southern Photometric Local Universe Survey Data Release 4 survey to identify isolated galaxy pairs and analyse their characteristics and properties. Our results align with previous spectroscopic studies, particularly in luminosity function parameters, suggesting a consistent trait among galaxy system…
Predicting astrometric microlensing events from Gaia Data Release 3
Su, Jie; Wang, Jiancheng; Zhang, Yigong +2 more
Currently, astrometric microlensing is the only tool that can directly measure the mass of a single star; it can also help us to detect compact objects such as isolated neutron stars and black holes. The number of microlensing events that are being predicted and reported is increasing. In this paper, potential lens stars are selected from three ty…
VVVX survey dusts off a new intermediate-age star cluster in the Milky Way disk
Minniti, D.; Saito, R. K.; Fernández-Trincado, J. G. +5 more
Context. In the last decade, many new star clusters have been discovered in heavily obscured regions of the Milky Way bulge and disk.
Aims: Our primary long-term objective is to seek out additional star clusters in the poorly studied regions of the Milky Way, where detections pose significant challenges. The aim of this pursuit is to finalize…
Weak equivalence principle and nonrelativistic limit of general dispersion relations
Hohmann, Manuel; Pfeifer, Christian; Wagner, Fabian
We study the weak equivalence principle in the context of modified dispersion relations, a prevalent approach to quantum gravity phenomenology. We find that generic modified dispersion relations violate the weak equivalence principle. The acceleration in general depends on the mass of the test body, unless the Hamiltonian is either 2-homogeneous i…
J0011+3217: A peculiar radio galaxy with a one-sided secondary lobe and misaligned giant primary lobes
Hardcastle, Martin J.; Pal, Sabyasachi; Kumari, Shobha +1 more
From the LOFAR Two-metre Sky Survey second data release (LoTSS DR2) at 144 MHz, we identified a peculiar radio galaxy, J0011+3217. It has a large, one-sided diffuse secondary wing that stretches up to 0.85 Mpc (roughly 85% of the size of the primary lobe). The linear size of the primary lobe of the galaxy is 0.99 Mpc. This peculiar source is a gia…
The Origin of Young Stellar Populations in NGC 1783: Accretion of External Stars
Milone, Antonino P.; Wang, Li; Deng, Licai +4 more
The presence of young stellar populations in the Large Magellanic Cloud cluster NGC 1783 has caught significant attention, with suggestions ranging from it being a genuine secondary stellar generation to a population of blue straggler stars or simply contamination from background stars. Thanks to multiepoch observations with the Hubble Space Teles…
TOI-4336 A b: A temperate sub-Neptune ripe for atmospheric characterization in a nearby triple M-dwarf system
Queloz, D.; Winn, J. N.; Kaltenegger, L. +54 more
Context. Small planets transiting bright nearby stars are essential to our understanding of the formation and evolution of exoplanetary systems. However, few constitute prime targets for atmospheric characterization, and even fewer are part of multiple star systems.
Aims: This work aims to validate TOI-4336 A b, a sub-Neptune-sized exoplanet …
A High Incidence of Dusty Hα Emitters at z > 3 Among UltraVISTA Dropout Galaxies in COSMOS Revealed by JWST
Rinaldi, Pierluigi; Caputi, Karina I.; Ashby, Matthew L. N. +3 more
We have characterized 26 Spitzer/IRAC-selected sources from the SMUVS program that are undetected in the UltraVISTA DR5 H- and/or K s-band images, covering 94 arcmin2 of the COSMOS field, which have deep multiwavelength JWST photometry. We analyzed the JWST/NIRCam imaging from the PRIMER survey and ancillary HST data to revea…
Evidence for a Fast Soft X-Ray Wind in M82 from XMM-RGS
Boettcher, Erin; Hodges-Kluck, Edmund
Starburst wind models predict that metals and energy are primarily carried out of the disk by hot gas (T > 106 K), but the low energy resolution of X-ray CCD observations results in large uncertainties on the mass and energy loading. Here, we present evidence for a fast soft X-ray wind from the prototypical starburst galaxy M82 using…