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21 papers · 1 filter
Towards a Spectro-Photometric Characterization of the Chilean Night Sky. A first quantitative assessment of ALAN across the Coquimbo Region
Rodolfo Angeloni, Juan Pablo Uchima Tamayo, Marcelo Jaque Arancibia +8
Light pollution is recognized as a global issue that, like other forms of anthropogenic pollution, has significant impact on ecosystems and adverse effects on living organisms. Mul…
Environmental Quenching of Low Surface Brightness Galaxies near Milky Way mass Hosts
J. Bhattacharyya, A. H. G. Peter, P. Martini +48
Low Surface Brightness Galaxies (LSBGs) are excellent probes of quenching and other environmental processes near massive galaxies. We study an extensive sample of LSBGs near massiv…
Separated twins or just siblings? A multi-planet system around an M dwarf including a cool sub-Neptune
Mallory Harris, Diana Dragomir, Ismael Mireles +27
We report the discovery of two TESS sub-Neptunes orbiting the early M dwarf TOI-904 (TIC 261257684). Both exoplanets, TOI-904 b and c, were initially observed in TESS Sector 12 wit…
TOI-858 B b: A hot Jupiter on a polar orbit in a loose binary
J. Hagelberg, L. D. Nielsen, O. Attia +30
We report the discovery of a hot Jupiter on a 3.28-day orbit around a 1.08 M G0 star that is the secondary component in a loose binary system. Based on follow-up radial vel…
Cosmology from Cross-Correlation of ACT-DR4 CMB Lensing and DES-Y3 Cosmic Shear
S. Shaikh, I. Harrison, A. van Engelen +105
Cross-correlation between weak lensing of the Cosmic Microwave Background (CMB) and weak lensing of galaxies offers a way to place robust constraints on cosmological and astrophysi…
RR Lyrae stars as probes of the outer Galactic halo: Chemical and kinematic analysis of a pilot sample
Gustavo E. Medina, Camilla J. Hansen, Ricardo R. Muñoz +4
We report the spectroscopic analysis of 20 halo ab-type RR Lyrae stars with heliocentric distances between 15 and 165 kpc, conducted using medium-resolution spectra from the Magell…