22–26 Sept 2025
Institut de Physique du Globe de Paris
Europe/Paris timezone

Galactic fields in the LoTSS

22 Sept 2025, 15:15
15m
Institut de Physique du Globe de Paris

Institut de Physique du Globe de Paris

1 Rue Jussieu 75005 Paris France
Talk Galaxy, ISM Science talks

Speaker

Maria Arias (Leiden Observatory)

Description

By the end of LOFAR 1.0 operations in the summer of 2024, the LOFAR Two-meter Sky Survey (LoTSS) had surveyed 85% of the Northern sky. The majority of the missing 15% of regions are at Galactic latitudes b<|20| degrees. However, a substantial fraction of the Milky Way was observed as part of the LoTSS, and will be part of data release three (DR-3), including two long contiguous segments between Galactic longitudes l=30-77 and l =123-180 degrees, as well as smaller regions around l=97-106, and l=190-209 degrees. We refer to these regions as the LoTSS Galactic Fields.

In this talk, I will present these fields and discuss their scientific potential for Galactic science. I will then showcase one science case in depth: that of Galactic supernova remnants (SNRs). I will show that these LoTSS data have the potential of altering our understanding of the low-energy electrons in SNRs as their low-frequency spectra deviate from classical power-law behavior. Moreover, they can address the “missing SNRs problem” with the discovery of tens of new sources in the survey regions.

Author

Maria Arias (Leiden Observatory)

Presentation materials

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