Astronomy:Ear Nebula
| Nebula | |
|---|---|
| Planetary Nebula | |
.jpg) Image of Ear Nebula | |
| Observation data: epoch | |
| Right ascension | 20h 50m 13.00s[1] |
| Declination | +46° 55′ 18.0″[1] |
| Constellation | Cygnus |
| Designations | IPHASX J205013.6+465515, PN G086.5+01.8, Ear Nebula, Ra 10[1] |
IPHASX J205013.6+465515, informally known as the Ear Nebula, is a faint bipolar planetary nebula located in the constellation of Cygnus. It was discovered in 2005 during the INT Photometric Hα Survey (IPHAS) and is classified as a relatively evolved object with low surface brightness, making it challenging to observe without specialized equipment.[2][3][4][5][6]
Charecterstics
It is surrounded by a faint, irregular shell, which may represent an asymptotic giant branch (AGB) remnant and the central star might be a white dwarf or an early multiple-shell structure. This shell suggests minimal distortion in the main nebula, classifying it as a WZO1-type planetary nebula-interstellar medium (PN-ISM) interaction candidate, where the central structure remains largely unaffected, possibly with a distant bow shock.[3][4][7][8]
References
- ↑ 1.0 1.1 1.2 "Simbad - Object view". https://simbad.cds.unistra.fr/mobile/object.html?object_name=IPHASX%20J205013.6%2B465515.
- ↑ info@noirlab.edu. "IPHASX J205013.7+465518, the Ear Nebula" (in en). https://www.noirlab.edu/public/images/noao-ear/.
- ↑ 3.0 3.1 Sabin, Laurence; Zijlstra, Albert A.; Wareing, Christopher; Corradi, Romano L. M.; Mampaso, Antonio; Viironen, Kerttu; Wright, Nicholas J.; Parker, Quentin A. (2009-12-30), "New Candidate Planetary Nebulae in the IPHAS Survey: The Case of Planetary Nebulae with ISM interaction", Publications of the Astronomical Society of Australia 27 (2): 166–173, doi:10.1071/AS09046
- ↑ 4.0 4.1 Sabin, L.; Parker, Q. A.; Corradi, R. L. M; Guzman-Ramirez, L.; Morris, R. A. H.; Zijlstra, A. A.; Bojičić, I. S.; Frew, D. J. et al. (2014-10-01). "First release of the IPHAS catalogue of new extended planetary nebulae" (in en). Monthly Notices of the Royal Astronomical Society 443 (4): 3388–3401. doi:10.1093/mnras/stu1404. ISSN 1365-2966. http://academic.oup.com/mnras/article/443/4/3388/1019117/First-release-of-the-IPHAS-catalogue-of-new.
- ↑ "Planetary Nebulae". https://planetarynebulae.net/FR/page_np.php?id=240.
- ↑ "Hanson Astrophotography-Planetary Nebula" (in en-US). https://www.hansonastronomy.com/planetary-nebula-1.
- ↑ Sabin, L; Guerrero, M A; Ramos-Larios, G; Boumis, P; Zijlstra, A A; Awang Iskandar, D N F; Barlow, M J; Toalá, J A et al. (2021-10-06). "First deep images catalogue of extended IPHAS PNe" (in en). Monthly Notices of the Royal Astronomical Society 508 (2): 1599–1617. doi:10.1093/mnras/stab2477. ISSN 0035-8711. https://academic.oup.com/mnras/article/508/2/1599/6373477.
- ↑ González-Santamaría, I.; Manteiga, M.; Manchado, A.; Ulla, A.; Dafonte, C.; Varela, P. López (2021-12-01). "Planetary nebulae in Gaia EDR3: Central star identification, properties, and binarity" (in en). Astronomy & Astrophysics 656: A51. doi:10.1051/0004-6361/202141916. ISSN 0004-6361. Bibcode: 2021A&A...656A..51G. https://www.aanda.org/articles/aa/abs/2021/12/aa41916-21/aa41916-21.html.
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