The Gaia photometric calibration and results on Galactic runaways
J. Ma\'iz Apell\'aniz (1), M. Pantaleoni Gonz\'alez (1,2), D. J., Lennon (3), R. H. Barb\'a (4), M. Weiler (5) ((1) CAB, CSIC-INTA, Spain, (2), UCM, Spain, (3) ESA, Spain, (4) ULS, Chile, (5) UB, Spain)
TL;DR
This paper details the calibration of Gaia photometric bands using a new HST/STIS library and presents the identification of 76 Galactic runaway stars, including new discoveries, based on Gaia DR1 data.
Contribution
It introduces improved Gaia photometric calibration methods and reports new findings on Galactic runaway stars from Gaia DR1 data.
Findings
Calibrated Gaia G, G_BP, G_RP bands with new sensitivity curves.
Identified 76 Galactic runaway stars, including 17-19 newly recognized.
Enhanced understanding of Gaia photometry and runaway star populations.
Abstract
We present results on two different Gaia-related topics. First, we describe our efforts to calibrate the three Gaia photometric passbands G, G_BP, and G_RP. We have built a new spectrophotometric HST/STIS library and used it to derive new sensitivity curves and zero points for the three bands, including recipes on how to correct some cases. Second, we present our results on Galactic runaway stars using Gaia DR1 proper motions: we detect 76 runaway stars, 17 (possibly 19) of them not previously identified as such.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Solar and Space Plasma Dynamics