Spectroscopic confirmation and photoionization modelling of compact planetary nebulae from the HASH data base
Monthly Notices of the Royal Astronomical Society, cilt.549, sa.4, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 549 Sayı: 4
- Basım Tarihi: 2026
- Doi Numarası: 10.1093/mnras/stag892
- Dergi Adı: Monthly Notices of the Royal Astronomical Society
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Applied Science & Technology Source, Compendex, INSPEC, zbMATH, Directory of Open Access Journals, Academic Search Ultimate (EBSCO), Technology Collection (ProQuest)
- Anahtar Kelimeler: dust, extinction, planetary nebulae: general, techniques: photometric, techniques: spectroscopic
- Çukurova Üniversitesi Adresli: Evet
Özet
The Hong Kong/AAO/Strasbourg H(Formula presented) (HASH) data base contains numerous planetary nebula (PN) candidates that require detailed spectroscopic analysis to confirm their nature and understand their physical and evolutionary states. This study aims to determine the physical and chemical properties of four compact nebular objects (PN G026.5+02.0, PN G027.6-04.3, PN G041.8+04.4, and PN G077.7+03.1) selected from the HASH data base based on their spectroscopic observations and to reveal the properties of their central stars through detailed photoionization modelling. High signal-to-noise ratio optical spectra were obtained using the TFOSC instrument on the 150-cm RTT150 telescope at TÜBİTAK National Observatory (TUG). Physical parameters and elemental abundances were initially derived using the neat code. Subsequently, photoionization models were applied using the cloudy code to reconstruct the spectral energy distributions of the objects. Analysis of diagnostic diagrams confirmed PN G041.8+04.4 and PN G077.7+03.1 as true PNe, while the remaining two as candidates. For the confirmed PNe, central star effective temperatures range from (Formula presented) 35 000 to (Formula presented) 109 000 K, with luminosities between (Formula presented) 2430 (Formula presented) and (Formula presented) 7130 (Formula presented). Comparison with post-AGB evolutionary tracks suggests progenitor masses of (Formula presented) 1 (Formula presented) and (Formula presented) 2.5 (Formula presented) with evolutionary ages of (Formula presented) 7000 and (Formula presented) 600 yr, respectively. Chemical abundances are generally consistent with Galactic values, although PN G077.7+03.1 exhibits He and N enrichment, identifying it as a Peimbert Type I PN.