5 papers
Prior-free cosmological parameter estimation of Cosmicflows-4
C. Duangchan, A. Valade, N. I. Libeskind +1
As tracers of the underlying mass distributions, the peculiar velocities of galaxies are valuable probes of the Universe, allowing us to measure the Hubble constant or to map the l…
Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost
A. Khalatyan, F. Anders, C. Chiappini +14
In this paper, we explore the feasibility of using machine learning regression as a method of extracting basic stellar parameters and line-of-sight extinctions from spectro-photome…
Gaia DR3 data consistent with a short bar connected to a spiral arm
E. Vislosky, I. Minchev, S. Khoperskov +8
We use numerical simulations to model Gaia DR3 data with the aim of constraining the Milky Way bar and spiral structure parameters. We show that both the morphology and the velocit…
Empirical derivation of the metallicity evolution with time and radius using TNG50 Milky Way/Andromeda analogues
B. Ratcliffe, S. Khoperskov, I. Minchev +3
Recent works have used a linear birth metallicity gradient to estimate the evolution of the [Fe/H] profile in the Galactic disk over time, and infer stellar birth radii (R$_\text{b…
A portrait of the Vast Polar Structure as a young phenomenon: hints from its member satellites
S. Taibi, M. S. Pawlowski, S. Khoperskov +2
It has been observed that several Milky Way (MW) satellite dwarf galaxies are distributed along a coherent planar distribution known as the Vast Polar Structure (VPOS). Here we inv…