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

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BAKIŞ H., Bulut G., BAKIŞ V., Sano H., Sezer A.

Monthly Notices of the Royal Astronomical Society, cilt.521, sa.1, ss.1099-1112, 2023 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 521 Sayı: 1
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1093/mnras/stad576
  • Dergi Adı: Monthly Notices of the Royal Astronomical Society
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, Compendex, INSPEC, Metadex, zbMATH, DIALNET, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.1099-1112
  • Anahtar Kelimeler: HII regions, ISM: individual objects: G107.5, 1.5-ISM: supernova remnants
  • Akdeniz Üniversitesi Adresli: Evet

Özet

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.