Maser, infrared and optical emission for late-type stars in the Galactic plane

TL;DR

This paper discusses the use of multi-wavelength observations, including radio, infrared, and optical data, to study late-type stars in the Galactic plane, aiming to understand their properties and distribution.

Contribution

It introduces a combined approach using Gaia, infrared surveys, and VLBI radio observations to analyze evolved, mass-losing stars and compare Galactic parameters across different stellar populations.

Findings

Overlap of optical, infrared, and radio sources provides new insights into late-type stars.

Radio astrometry complements Gaia data for evolved star studies.

Potential to refine Galactic structure models using combined datasets.

Abstract

Radio astrometric campaigns using VLBI have provided distances and proper motions for masers associated with young massive stars (BeSSeL survey). The ongoing BAaDE project plans to obtain astrometric information of SiO maser stars located in the inner Galaxy. These stars are associated with evolved, mass-losing stars. By overlapping optical (Gaia), infrared (2MASS, MSX and WISE) and radio (BAaDE) sources, we expect to obtain important clues on the intrinsic properties and population distribution of late-type stars. Moreover, a comparison of the Galactic parameters obtained with Gaia and VLBI can be done using radio observations on different targets: young massive stars (BeSSeL) and evolved stars (BAaDE).