Tootfinder

Shiva and Shakti - Presumed Proto-Galactic Fragments in the Inner Milky Way: #Gaia unravels the ancient threads of the #MilkyWay: #galaxy, discovering two surprising streams of stars that formed and wove together over 12 billion years ago.

This https://arxiv.org/abs/2402.14960 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

The Gaia white dwarf revolution
This review highlights the role of the \textit{Gaia} space mission in transforming white dwarf research. These stellar remnants constitute 5-7\% of the local stellar population in volume, yet before \textit{Gaia} the lack of trigonometric parallaxes hindered their identification. The mission's Data Release 2 in 2018 provided the first unbiased colour-absolute magnitude diagram of the local stellar population, identifying 260\,000 white dwarfs, with the number later increasing to over 355\,000 i…

Je veux être où tu es
Ubi tu gaius ego gaia

Tracing the Galactic disk from the kinematics of Gaia Cepheids
Xiaoyue ZhouNational Astronomical Observatories of Chinese Academy of Sciences, Xiaodian ChenNational Astronomical Observatories of Chinese Academy of Sciences, Licai DengNational Astronomical Observatories of Chinese Academy of Sciences, Shu WangNational Astronomical Observatories of Chinese Academy of Sciences

Tracing the Galactic disk from the kinematics of Gaia Cepheids
Classical Cepheids (CCs) are excellent tracers for understanding the structure of the Milky Way disk. The latest Gaia Data Release 3 provides a large number of line-of-sight velocity information for Galactic CCs, offering an opportunity for studying the kinematics of the Milky Way. We determine the three-dimensional velocities of 2057 CCs relative to the Galactic center. From the projections of the 3D velocities onto the XY plane of the Galactic disk, we find that $V_{R}$ and $V_ϕ$ velocities …

This https://arxiv.org/abs/2402.14984 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Correlations between Ca II H&K Emission and the Gaia M dwarf Gap
The Gaia M dwarf gap, also known as the Jao Gap, is a novel feature discovered in the Gaia DR2 G vs. BP-RP color magnitude diagram. This gap represents a 17 percent decrease in stellar density in a thin magnitude band around the convective transition mass ($\sim 0.35 M_{\odot}$) on the main sequence. Previous work has demonstrated a paucity of Hydrogen Alpha emission coincident with the G magnitude of the Jao Gap in the solar neighborhood. The exact mechanism which results in this paucity is as…

Je veux être où tu es
Ubi tu gaius ego gaia

New method for estimating molecular cloud distances based on Gaia, 2MASS, and the TRILEGAL galaxy model
Juan Mei, Zhiwei Chen, Zhibo Jiang, Sheng Zheng, Haoran Feng
https://arxiv.org/abs/2402.17276

New method for estimating molecular cloud distances based on Gaia, 2MASS, and the TRILEGAL galaxy model
We propose a new method for estimating the distances of molecular clouds traced by CO line emission. Stars from 2MASS and Gaia EDR3 are selected as on-cloud stars when they are projected on a cloud. The background on-cloud stars have redder colors on average than the foreground stars. Instead of searching for stars projected away from the cloud, we employed the TRILEGA galaxy model to mimic the stellar population without cloud extinction along the sightline toward the cloud. Our method does not…

This https://arxiv.org/abs/2402.14984 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Correlations between Ca II H&K Emission and the Gaia M dwarf Gap
The Gaia M dwarf gap, also known as the Jao Gap, is a novel feature discovered in the Gaia DR2 G vs. BP-RP color magnitude diagram. This gap represents a 17 percent decrease in stellar density in a thin magnitude band around the convective transition mass ($\sim 0.35 M_{\odot}$) on the main sequence. Previous work has demonstrated a paucity of Hydrogen Alpha emission coincident with the G magnitude of the Jao Gap in the solar neighborhood. The exact mechanism which results in this paucity is as…

The Sun Remains Relatively Refractory Depleted: Elemental Abundances for 17,412 Gaia RVS Solar Analogs and 50 Planet Hosts
Rayna Rampalli, Melissa K. Ness, Graham H. Edwards, Elisabeth R. Newton, Megan Bedell
https://arxiv.org/abs/2402.16954

The Sun Remains Relatively Refractory Depleted: Elemental Abundances for 17,412 Gaia RVS Solar Analogs and 50 Planet Hosts
The elemental abundances of stars, particularly the refractory elements (e.g., Fe, Si, Mg), play an important role in connecting stars to their planets. Most Sun-like stars do not have refractory abundance measurements since obtaining a large sample of high-resolution spectra is difficult with oversubscribed observing resources. In this work we infer abundances for C, N, O, Na, Mn, Cr, Si, Fe, Ni, Mg, V, Ca, Ti, Al, and Y for solar analogs with Gaia RVS spectra (R=11,200) using the Cannon, a da…

The Gaia white dwarf revolution
Pier-Emmanuel Tremblay, Antoine B\'edard, Mairi W. O'Brien, James Munday, Abbigail K. Elms, Nicola Pietro Gentillo Fusillo, Snehalata Sahu
https://arxiv.org/abs/2402.14960

The Gaia white dwarf revolution
This review highlights the role of the \textit{Gaia} space mission in transforming white dwarf research. These stellar remnants constitute 5-7\% of the local stellar population in volume, yet before \textit{Gaia} the lack of trigonometric parallaxes hindered their identification. The mission's Data Release 2 in 2018 provided the first unbiased colour-absolute magnitude diagram of the local stellar population, identifying 260\,000 white dwarfs, with the number later increasing to over 355\,000 i…