Details

Autor(en) / Beteiligte

• Bakış, H
• Bulut, G
• Bakış, V
• Sano, H
• Sezer, A

Titel

Discovery of optical emission associated with the supernova remnant G107.5−1.5

Ist Teil von

• Monthly notices of the Royal Astronomical Society, 2023-05, Vol.521 (1), p.1099-1112

Ort / Verlag

Oxford University Press

Erscheinungsjahr

2023

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• ABSTRACT We present the first results from an imaging and a spectroscopic survey of the optical emission associated with supernova remnant (SNR) G107.5−1.5. We discovered optical diffuse and filamentary emission from G107.5−1.5 using the 1.5- and 1-m telescopes. The optical emissions from the North-East (NE) and North-West (NW) regions show the diffuse structure, while the South-East (SE) and East (E) regions show filamentary structure. From long-slit spectra, we found [S ii]/H α > 0.5 for the SE and E regions, which supports the origin of the emission being from shock-heated gas. The average [S ii]/H α ratio is found to be ∼0.4 and ∼0.3 for the NW and NE regions, respectively, indicating that the optical emission is coming from ionized gas in an H ii region. From the ratios of [S ii]λλ 6716/6731, we estimate an average electron density of ∼2400 cm−3 for the NW region, which can be attributed to the dense ionized gas. The average [S ii]λλ 6716/6731 ratios are ∼1.25 and ∼1.15 for the SE and E regions, respectively, which are indicative of low-electron density.