Search Publications
Dark matter in the Milky Way: Measurements up to 3 kpc from the Galactic plane above the Sun
Reylé, C.; Robin, A. C.; Bienaymé, O. +1 more
We probe the gravitational force perpendicular to the Galactic plane at the position of the Sun based on a sample of red giants, with measurements taken from the DR3 Gaia catalogue. Measurements far out of the Galactic plane up to 3.5 kpc allow us to determine directly the total mass density, where dark matter is dominant and the stellar and gas d…
Understanding the Dust Environment at Mercury: From Surface to Exosphere
Krüger, Harald; Kobayashi, Masanori; Murakami, Go +13 more
We provide an overview of our understanding of the dust environment at Mercury and the role that dust plays in shaping the planet's surface and exosphere. Our understanding of the role that dust impacts play in the generation of Mercury's atmosphere has evolved considerably with continued analysis of results from the MErcury Surface, Space ENviron…
Cosmological Constraints on Neutrino Masses in Light of JWST Red and Massive Candidate Galaxies
Su, Yan; Huang, Zhi-Qi; Liu, Jian-Qi
The overabundance of the red and massive candidate galaxies observed by the James Webb Space Telescope (JWST) implies efficient structure formation or large star formation efficiency at high redshift z ∼ 10. In the scenario of a low or moderate star formation efficiency, because massive neutrinos tend to suppress the growth of structure of the uni…
Gas metallicity of ram-pressure-stripped galaxies at intermediate redshifts with MUSE data
Werle, A.; Poggianti, B.; Gullieuszik, M. +5 more
Extraplanar tails of ionized-stripped gas, extending up to several tens of kiloparsecs beyond the stellar disk, are often observed in ram-pressure-stripped (RPS) galaxies in low-redshift clusters. Recent studies have also identified similar tails at high redshifts, and we present here the first analysis of the chemical composition of such tails be…
Atmospheric gravity waves in Venus dayside clouds from VIRTIS-M images
Cardesín-Moinelo, Alejandro; Hueso, Ricardo; Peralta, Javier +3 more
We perform a survey of the Visible and Infrared Thermal Imaging Spectrometer-Mapper (VIRTIS-M) images onboard the Venus Express space mission, at four narrow wavelength bands that target different altitude regions on the cloud deck of Venus' atmosphere (280–320, 365–400, 580–600, 900–920 nm). Our goal was to detect and characterize atmospheric gra…
Detection of gravitational waves in circular particle accelerators II. Response analysis and parameter estimation using synthetic data
Brüggen, Marcus; Rao, Suvrat; Baumgarten, Julia +1 more
We simulate the response of a Storage Ring Gravitational Wave Observatory (SRGO) to astrophysical millihertz (mHz) gravitational waves (GWs), numerically obtaining its sensitivity curve and optimal choices for some controllable experiment parameters. We also generate synthetic noisy GW data and use Markov Chain Monte Carlo methods to perform param…
Parallel Electron Beams at Io: Numerical Simulations of the Dense Plasma Wake
Bagenal, F.; Dols, V.; Paterson, W. R.
In 1995, the Galileo spacecraft traversed the wake of Io at ∼900 km altitude. The instruments onboard detected intense bi-directional field-aligned electron beams (∼140 eV-150 keV), embedded in a dense, cold and slow plasma wake (Nel ∼ 35,000 cm−3, Ti < 10 eV, V < 3 km/s). Similar electron beams were also det…
BD UMi: Eccentric detached binary with γ Doradus type component
Gürol, Birol
BD UMi is an Algol-type eccentric eclipsing binary with one of the components showing γ Doradus type pulsation. In this study we used the Transiting Exoplanet Survey Satellite (TESS) observations of the BD UMi system published in total of 16 sectors. We obtained the minima times of the eclipsing system and refined new light elements by using (O - …
Reconstructing Sunspot Number by Forward-Modelling Open Solar Flux
Pope, Benjamin J. S.; Lockwood, Mike; Owens, Mathew J. +4 more
The open solar flux (OSF) is the integrated unsigned magnetic flux leaving the top of the solar atmosphere to form the heliospheric magnetic field. As the OSF modulates the intensity of galactic cosmic rays at Earth, the production rate of cosmogenic isotopes - such as 14C and 10Be stored in tree rings and ice sheets - is clo…
Hot Stellar Populations of Berkeley 39 Using Swift/UVOT
Panthi, Anju; Vaidya, Kaushar; Chand, Komal +1 more
Open clusters are excellent tools to probe the history of the Galactic disk and properties of star formation. In this work, we present a study of an old age open cluster Berkeley 39 using the observations from UVOT instrument of the Neil Gehrels Swift observatory. Making use of a machine learning algorithm, ML-MOC, we have identified a total of 86…