SYNMAST Archives

Magnetic field analysis for the star 2M07590587+1523294. The left panels show the four Fe I lines used in the modeling: black dots are the observed APOGEE spectrum, red dashed lines are synthetic profiles computed without a magnetic field, and dark blue lines are our best fits obtained from the MCMC modeling. The right panel is a corner plot that presents the median and uncertainties (from 16th and 84th percentiles) of the derived parameters, which includes filling factors from magnetic fields between 2 and 6 kG in steps of 2 kG. We also show the final magnetic field result and its uncertainties. -- astro-ph.SR

Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Magnetic Fields, Electromagnetism, bioelectricity,, Radiation, Space Weather & Heliophysics, Status Report

Magnetic Fields in a Sample of Planet-hosting M Dwarf Stars from Kepler, K2, and TESS Observed by APOGEE

by Keith CowingSeptember 11, 2024September 11, 2024

Stellar magnetic fields have a major impact on space weather around exoplanets orbiting low-mass stars. From an analysis of Zeeman-broadened Fe I lines measured in near-infrared SDSS/APOGEE spectra, mean magnetic […]

Mean magnetic fields versus rotational periods for Pleiades M dwarfs rapid (open blue circles, Ro0.13), along with data compiled from the literature. Green squares, black x’s, and cyan diamonds are data from respectively Shulyak et al. (2017, 2019), Reiners et al. (2022), and Cristofari et al. (2023a,b). Orange triangles show results from other works, see text for references. -- astro-ph.SR

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Magnetic Fields, Electromagnetism, bioelectricity,, Status Report, Stellar Cartography

Magnetic Fields of M Dwarfs from the Pleiades Open Cluster

by Keith CowingJuly 11, 2024July 7, 2024

Average magnetic field measurements are presented for 62 M-dwarf members of the Pleiades open cluster, derived from Zeeman-enhanced Fe I lines in the H-band. An MCMC methodology was employed to […]