Prépublication
· 2026 arXiv
EN
The primordial sound waves in the baryon-photon plasma are imprinted on the large-scale galaxy distribution as Baryon Acoustic Oscillations (BAO), serving as a cosmological standard ruler to constrain dark energy and the Hubble parameter. The upcoming 21cm int...
Ajith Sampath
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
We present JWST/MIRI Low Resolution Spectroscopy (LRS) of 3I/ATLAS obtained post-perihelion at a heliocentric distance of 2.21 au. Our spectrum contains a prominent 10 micron silicate emission feature with a broad, smooth shape that is distinct from those comm...
Cristina A. Thomas, Michael S. P. Kelley et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
The Dark Energy Science Collaboration has prepared a multitude of pipelines to process the upcoming Vera C. Rubin Observatory data and perform different scientific analyses. Here, we present the methodology to constrain the mass information of galaxy clusters...
Michel Aguena, Céline Combet et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
We investigate single-field inflation models that can produce large curvature perturbations at sub-Mpc scales while remaining consistent with cosmological observations across multiple regimes. We highlight the tension between generating enhanced small-scale pe...
Qing-Yang Wang, Jing-Zhi Zhou et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
We present a deep low-frequency radio point-source catalogue centred on the North Celestial Pole (NCP) and extending $5^\circ$ in radius, derived from a single 24-h observation with the 21 CentiMeter Array (21CMA). Covering 75-175 MHz, the catalogue characteri...
Qizhe Tang, Jingying Wang et al.
#astro-ph.IM
Prépublication
· 2026 arXiv
EN
Blue cores in brightest cluster galaxies (BCGs) trace recent central activity associated with cooling cluster atmospheres. We search for blue cores at $z10^{44}$ erg s$^{-1}$; red Ha emitters also favor higher X-ray luminosities. The blue-core fraction rises w...
M. Kluge, E. Bulbul et al.
#astro-ph.GA
Prépublication
· 2026 arXiv
EN
Context. Some debris discs contain cold molecular gas. The origin of this gas is one of the key questions in our understanding of the evolution of planetary systems. The effect of gas on the smallest dust grains, which are expected to be unbound due to radiati...
Marija R. Jankovic, Tim D. Pearce et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
Venus is home to vivid sulfur chemistry, with SO$_2$ as the major sulfur gas species and a global cloud layer between 47 and~70 km composed of H$_2$SO$_4$ and H$_2$O. The chemistry in the clouds has been extensively studied with 1D models, but none is able to...
Maxence Lefèvre, Franck Lefèvre et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
We study the possibility of the formation of primordial black holes (PBHs) using an inflaton potential constructed by stabilizing all Kähler moduli employing both the perturbative and non-perturbative corrections in the large volume scenario in type-IIB/F stri...
Chitrak Sarkar, Amitava Choudhuri et al.
#gr-qc
Prépublication
· 2026 arXiv
EN
Recent cosmological data provide weak hints for smaller masses than what is required by neutrino-oscillation experiments, motivating investigations into variation of the neutrino masses with cosmic time. Here we study a model where the neutrinos couple to a qu...
Øyvind Christiansen, Julian Adamek et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
T. Mazeh and coworkers pioneered a method using rotational photometric modulation as a proxy to infer stellar obliquities in Kepler transiting planetary systems, based on the expected positive correlation between spot-induced modulation amplitudes and stellar...
Kento Masuda, Subo Dong
#astro-ph.EP
Texte transcrit
· 1891 Wikisource
FR
Extrait : Edgar Monteil Histoire du célèbre Pépé Illustrations par Henri Pille. 1891. Texte sur une seule page HISTOIRE DU CÉLÈBRE PÉPÉ PAR EDGAR MONTEIL ILLUSTRÉE
Wikisource
#Histoire