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First Doppler image and starspot-corrected orbit for λ Andromedae: A multifaceted activity analysis
Strassmeier, K. G.; Weber, M.; Gruner, D. +3 more
Context. Starspots on a rotating stellar surface impact the measured radial velocities and thereby limit the determination of precise orbital elements as well as astrophysical stellar parameters and even jeopardize the detection and characterization of (exo)planets. Aims. We quantify the effect of starspots for the orbital elements of the spotted …
Structural Parameters of the Thin Disk Population from Evolved Stars in the Solar Neighborhood
Bilir, Selçuk; Plevne, Olcay; Önal Taş, Özgecan +1 more
This study investigates the structural parameters of the thin-disk population by analyzing the spatial distribution of evolved stars in the solar neighborhood. From the Gaia Data Release 3 database, about 39.1 million stars within 1 kpc and with relative parallax errors σϖ/ϖ ≤ 0.10 were selected. The photometric data was corrected for e…
Detection of polarized Fermi-bubble synchrotron and dust emission
Keshet, Uri
The elusive polarized microwave signal from the Fermi bubbles is disentangled from the more extended polarized lobes, which similarly emanate from the Galactic plane but stretch farther west of the bubbles. The projected
The Stellar Disk Structure Revealed by the Mono-age Populations of the LAMOST Red Clump Star Sample
Chen, Bingqiu; Wang, Chun; Liu, Xiaowei +2 more
Understanding the structure of the Galactic disk is crucial for understanding the formation and evolutionary history of the Milky Way. This study examines the structure of the Galactic disk by analyzing a sample of 138,667 primary red clump (RC) stars from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope and Gaia data sets. We have ca…
A pristine view of galactic globular clusters and their peripheries: Omega Centauri
Kuzma, P. B.; Ishigaki, M. N.
The central regions of the globular cluster Omega Centauri (
Production of linear alkanes via the solid-state hydrogenation of interstellar polyynes
Li, X.; Palumbo, M. E.; Chuang, K. -J. +2 more
Context. Highly unsaturated carbon chains, including polyynes, have been detected in many astronomical regions and planetary systems. With the success of the QUIJOTE survey of the Taurus Molecular Cloud-1 (TMC-1), the community has seen a "boom" in the number of detected carbon chains. On the other hand, the Rosetta mission revealed the release of…
Supernova remnants on the outskirts of the Large Magellanic Cloud
Maitra, Chandreyee; Sasaki, Manami; Zangrandi, Federico +13 more
When a star dies, it can explode in a supernova, causing a strong shock wave and forming an interstellar object called a supernova remnant (SNR). Observational studies of SNRs allow us to learn about the different types of progenitors, the explosion mechanisms, the physics of interstellar shocks, and the matter cycle in galaxies. We report on the …
Minute-cadence Observations of the LAMOST Fields with the TMTS. VI. Physical Parameters of Contact Binaries
Shi, Jianrong; Wang, Xiaofeng; Li, Kai +16 more
With the development of wide-field surveys, a large amount of data on short-period W UMa contact binaries have been obtained. Continuous and uninterrupted light curves as well as high-resolution spectroscopic data are crucial in determining the absolute physical parameters. Targets with both TMTS light curves and LAMOST medium-resolution spectra w…
Magnetic connectivity of coronal loops and flare-accelerated electrons in a B-class flare: Based on X-ray, EUV (DEM analysis), and type-III radio burst observations
Magdalenić, J.; Mann, G.; Zucca, P. +7 more
Context. In solar flares, non-potential magnetic field energy is transferred to particle acceleration, heating, and radiation. Multi-wavelength observations of the solar corona in extreme ultraviolet (EUV) and X-ray show the consequences of magnetic reconfiguration in lower heights, while radio observations contain information about the access of …
The GAPS programme at TNG: LXIV. An inner eccentric sub-Neptune and an outer sub-Neptune-mass candidate around BD+00 444 (TOI-2443)
Sozzetti, A.; Lanza, A. F.; Collins, K. A. +25 more
Context. Super-Earths and sub-Neptunes are the most common types of planets outside the Solar System and likely represent the link between terrestrial planets and gas giants. Characterizing their physical and orbital properties and studying their multiplicity are key steps in testing and understanding their formation, migration, and evolution. Aim…