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GLEAM Radyo Kaynakları Kataloğundaki Aday Süpernova Kalıntısı G20.1-0.2’nin Gama Işımasının Araştırılması

Year 2023, Volume: 4 Issue: 3 - Special Issue: Proceedings of the 22nd National Astronomy Congress, 71 - 74, 31.12.2023
https://doi.org/10.55064/tjaa.1203821

Abstract

İlk olarak, 345◦ < l < 60◦ ve 180◦ < l < 240◦ yapılan GaLactic ve Extragalactic All-sky Murchison Widefield Array
(GLEAM) gözlemlerinin kapsamında, olası bir süpernova kalıntısı (SNK) adayı olarak tanıtılan G20.1-0.2’yi analiz etmek
için Fermi-Geniş Alan Teleskobu (Fermi-LAT) tarafından toplanan 14 yıllık gama ışını verilerini inceledik. 0.2-300 GeV
enerji aralığında yapılan gama ışını verisi analizimiz, 4FGL J1828.0-1133 olarak adlandırılan dördüncü Fermi-LAT (4FGL)
kataloğundan bir gama ışını kaynağının, (L, B) = (20.177°, -0.254°) Galaktik koordinatlarında bulunduğunu gösterdi ve
bu noktasal yapıdaki kaynağın konum hata elipsi, uzamsal olarak G20.1-0.2 ile çakışmaktadır.Bu çalışmada 14 yıllık Fermi-
LAT verisini kullanarak 4FGL J1828.0-1133 kaynağını yeniden analiz ettik ve G20.1-0.2 ile arasındaki uzamsal örtüşmenin
detaylarını araştırdık. Analizimiz neticesinde 4FGL J1828.0-1133 gama ışını noktasal kaynağını sinyal arka-alan değerinin
∼ 6σ olduğunu ve enerji tayfının kuvvet kanununa uyduğunu tespit ettik.

References

  • Abdollahi, S. et al., 2022, Incremental Fermi Large Area Telescope Fourth Source Catalog, ApJS 260 53
  • Araya, M. et al., 2023, Fermi-LAT detection of G118.4 + 37.0: a supernova remnant in the Galactic halo seen around the Calvera pulsar, MNRAS, 518, 4132
  • Green, D. A., 2019, A catalogue of 294 Galactic supernova remnants, Journal of Astrophysics and Astronomy, 40, 36
  • Hurley-Walker, N. et al., 2019, Candidate radio supernova remnants observed by the GLEAM survey over 345◦ < l < 60◦, 180◦ < l < 240◦, https://doi.org/10.48550/arXiv.1911.08124
  • Mattox J. R. et al., 1996, The Likelihood Analysis of EGRET Data, ApJ, 461, 396
  • Ranasinghe, S., Leahy, D. A., Tian, W., New Distances to Four Supernova Remnants, Open Physics Journal, 4, 1-13
  • Vink, J., Physics and Evolution of Supernova Remnants, Springer Cham, ISSN: 0941-7834, 2020.

Searching for Gamma-ray Emission from the Supernova Remnant G20.1-0.2 Detected by the GLEAM Radio Source Catalog

Year 2023, Volume: 4 Issue: 3 - Special Issue: Proceedings of the 22nd National Astronomy Congress, 71 - 74, 31.12.2023
https://doi.org/10.55064/tjaa.1203821

Abstract

We examined 14 years of gamma-ray data gathered by the Fermi-Large Area Telescope (Fermi-LAT) to analyze G20.1-0.2,
which is first introduced as a potential supernova remnant (SNR) candidate based on the data release of the GaLactic
and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey, which observed new candidate SNRs. G20.1-0.2
is one of these candidate SNRs reported by GLEAM that spatially coincides with an unidentified gamma-ray source from
the fourth Fermi-LAT catalog (4FGL), called 4FGL J1828.0-1133. We analyzed Fermi-LAT gamma-ray data taken over
the energy range of 0.2 - 300 GeV at the location of 4FGL J1828.0-1133. Our analysis showed that the position of 4FGL
J1828.0-1133 overlaps with g20.1-0.2 assuming 4FGL J1828.0-1133 to be point-like gamma-ray source with a log parabola
type spectrum. 4FGL J1828.0-1133 was detected this source with a significance of 6σ. In this paper, we present the results
of this analys

References

  • Abdollahi, S. et al., 2022, Incremental Fermi Large Area Telescope Fourth Source Catalog, ApJS 260 53
  • Araya, M. et al., 2023, Fermi-LAT detection of G118.4 + 37.0: a supernova remnant in the Galactic halo seen around the Calvera pulsar, MNRAS, 518, 4132
  • Green, D. A., 2019, A catalogue of 294 Galactic supernova remnants, Journal of Astrophysics and Astronomy, 40, 36
  • Hurley-Walker, N. et al., 2019, Candidate radio supernova remnants observed by the GLEAM survey over 345◦ < l < 60◦, 180◦ < l < 240◦, https://doi.org/10.48550/arXiv.1911.08124
  • Mattox J. R. et al., 1996, The Likelihood Analysis of EGRET Data, ApJ, 461, 396
  • Ranasinghe, S., Leahy, D. A., Tian, W., New Distances to Four Supernova Remnants, Open Physics Journal, 4, 1-13
  • Vink, J., Physics and Evolution of Supernova Remnants, Springer Cham, ISSN: 0941-7834, 2020.
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Details

Primary Language Turkish
Subjects Astronomical Sciences (Other)
Journal Section Articles
Authors

Pınar Özyılmaz 0000-0002-2914-3908

Early Pub Date July 13, 2023
Publication Date December 31, 2023
Submission Date November 14, 2022
Acceptance Date February 1, 2023
Published in Issue Year 2023 Volume: 4 Issue: 3 - Special Issue: Proceedings of the 22nd National Astronomy Congress

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TJAA is a publication of Turkish Astronomical Society (TAD).