Wikipedia

Henize 70

Henize 70 (N70) is a faint[7] emission nebula[8] and superbubble[5][4][9][10][11][12][13][14][15][16][17][18][19][20][21][excessive citations] located in the Large Magellanic Cloud in the constellation of Dorado.

Henize 70
Emission nebula
Superbubble
Amateur photograph of Henize 70
Observation data: J2000 epoch
Right ascension05h 43m 17.5s[1]
Declination−67° 50′ 48″[1]
Distance~50,000[2] pc
Apparent dimensions (V)7′ × 8′[3]
ConstellationDorado
Physical characteristics
Dimensions346 × 396 ly[4][a]
Notable featuresSuperbubble
DesignationsHenize 70,[5] N70,[3] LHA 120-N 70,[3][6] DEM L 301, MCELS L-373[6]
See also: Lists of nebulae

Observation history

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Henize 70 was first observed in 1950 in a survey of bright planetary nebulae. Based on appearance it was proposed that it might be a supernova remnant.[7] In 1956, it was added to a catalogue of Hα emission stars and nebulae by Karl Gordon Henize, where it was described as an emission nebula rather than a planetary nebula.[8]

Origins

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ESO image of Henize 70

A paper published in 1978 proposed that the formations of Henize 70 and other emission nebulae could be due to stellar winds.[22] Later in 1981, a scientific article mentioned a higher likeliness of a supernova explosion forming the nebula instead of stellar winds.[23] A 2014 study measured that Henize 70 featured high SII and Hα ratios, indicating that it is not a supernova remnant.[24]

Henize 70 has spectral line ratios relatively similar to that of supernova remnants due to having similar SII/Hα line ratios although most supernova remnants have higher NII/Hα line ratios.[25]

Notes

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  1. ^ Using angular dimensions of 7’ × 8’ and a distance of ~170 kly.
     

References

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  1. ^ a b Pellegrini, E. W.; Oey, M. S.; Winkler, P. F.; Points, S. D.; Smith, R. C.; Jaskot, A. E.; Zastrow, J. (13 February 2012). "The Optical Depth of H II Regions in the Magellanic Clouds". The Astrophysical Journal. 755 (1): 30. arXiv:1202.3334. Bibcode:2012ApJ...755...40P. doi:10.1088/0004-637X/755/1/40. ISSN 0004-637X. S2CID 51059889.
  2. ^ Schneiter, E. M.; Reyes-Iturbide, J.; Velàzquez, P. F.; Esquivel, A. (2 February 2022). "X-ray and optical emission from large superbubbles including the stellar photoionization". Monthly Notices of the Royal Astronomical Society. 511 (3): 3420–3427. Bibcode:2022MNRAS.511.3420S. doi:10.1093/mnras/stac292. ISSN 1365-2966.
  3. ^ a b c Davies, R. D.; Elliott, K. H.; Meaburn, J. (1976). "The nebular complexes of the Large and Small Magellanic Clouds". Memoirs of the Royal Astronomical Society. 81: 89. Bibcode:1976MmRAS..81...89D.
  4. ^ a b "N70. Henize 70". Astrodrudis. Retrieved 14 April 2023.
  5. ^ a b "Henize 70: A SuperBubble In The LMC". Astronomy Picture of the Day. Retrieved 14 April 2023.
  6. ^ a b "LHA 120-N 70". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 14 April 2023.
  7. ^ a b Evans, D. S.; Thackeray, A. D. (1950). "A photographic survey of bright southern planetary nebulae". Monthly Notices of the Royal Astronomical Society. 110 (5): 429–439. Bibcode:1950MNRAS.110..429E. doi:10.1093/mnras/110.5.429. ISSN 1365-2966.
  8. ^ a b Henize, Karl G. (September 1956). "Catalogues of Hα-emission Stars and Nebulae in the Magellanic Clouds". Astrophysical Journal Supplement. 2: 315. Bibcode:1956ApJS....2..315H. doi:10.1086/190025. ISSN 0067-0049.
  9. ^ "N70 Nebula in the Large Magellanic Cloud". European Southern Observatory. 14 April 2023.
  10. ^ "Henize 70: A Superbubble in the LMC". NASA. 14 April 2023.
  11. ^ Ambrocio-Cruz, P.; Le Coarer, E.; Rosado, M.; Russeil, D.; Amram, P.; Laval, A.; Epinat, B.; Ramírez, M.; Odonne, M.; Goldes, G. (1 April 2016). "The kinematical properties of superbubbles and H II regions of the Large Magellanic Cloud derived from the 3D Hα Survey". Monthly Notices of the Royal Astronomical Society. 457 (2): 2048–2067. Bibcode:2016MNRAS.457.2048A. doi:10.1093/mnras/stw054. ISSN 0035-8711. S2CID 123722565.
  12. ^ De Horta, A. Y.; et al. (14 May 2014). "Multi-frequency Observations of a Superbubble in the LMC: The Case of LHA 120-N 70". The Astronomical Journal. 147 (6): 8. arXiv:1404.3823. Bibcode:2014AJ....147..162D. doi:10.1088/0004-6256/147/6/162. ISSN 0004-6256. S2CID 118458341.
  13. ^ Reyes-Iturbide, J.; et al. (17 October 2014). "Diffuse X-Ray Emission from the Superbubbles N70 and N185 in the Large Magellanic Cloud". The Astronomical Journal. 148 (5): 8. arXiv:1407.7586. Bibcode:2014AJ....148..102R. doi:10.1088/0004-6256/148/5/102. ISSN 0004-6256. S2CID 119225213.
  14. ^ Rodríguez-González, A.; et al. (2 May 2011). "X-Ray Emission and Dynamics from Large Diameter Superbubbles: The Case of the N70 Superbubble". The Astrophysical Journal. 733 (1): 8. arXiv:1102.2938. Bibcode:2011ApJ...733...34R. doi:10.1088/0004-637X/733/1/34. ISSN 0004-637X. S2CID 119210133.
  15. ^ Reyes-Iturbide, J.; et al. (October 2011). "Diffuse X-ray emission from the superbubble N70" (PDF). XIII Latin American Regional IAU Meeting (Eds. W. J. Henney & S. Torres-Peimbert) Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias). 40: 199. Bibcode:2011RMxAC..40..199R. S2CID 117750676.
  16. ^ Sankrit, Ravi; Dixon, W. Van Dyke (13 February 2007). "O VI Emission from Superbubbles in the Large Magellanic Cloud". The Publications of the Astronomical Society of the Pacific. 119 (853): 284–291. Bibcode:2007PASP..119..284S. doi:10.1086/513288. ISSN 0004-6280. S2CID 116757625.
  17. ^ Danforth, Charles W.; Blair, William P. (July 2006). "Possible Detection of O VI from the Large Magellanic Cloud Superbubble N70". The Astrophysical Journal. 646 (1): 205–212. arXiv:astro-ph/0603809. Bibcode:2006ApJ...646..205D. doi:10.1086/504706. ISSN 0004-637X. S2CID 18990945.
  18. ^ Oey, M. S.; García-Segura, G. (September 2004). "Ambient Interstellar Pressure and Superbubble Evolution". The Astrophysical Journal. 613 (1): 302–311. arXiv:astro-ph/0403713. Bibcode:2004ApJ...613..302O. doi:10.1086/421483. ISSN 0004-637X. S2CID 9404310.
  19. ^ Oey, M. S. (August 1996). "The Dynamics of Superbubbles in the Large Magellanic Cloud". The Astrophysical Journal. 467: 666. Bibcode:1996ApJ...467..666O. doi:10.1086/177642. ISSN 0004-637X. S2CID 122079386.
  20. ^ Oey, M. S. (May 1996). "UBV Photometry of OB Associations within Superbubbles of the Large Magellanic Cloud". Astrophysical Journal Supplement. 104: 71. Bibcode:1996ApJS..104...71O. doi:10.1086/192292. ISSN 0067-0049. S2CID 122528550.
  21. ^ Chu, You-Hua; Mac Low, Mordecai-Mark (December 1990). "X-Rays from Superbubbles in the Large Magellanic Cloud". The Astrophysical Journal. 365: 510. Bibcode:1990ApJ...365..510C. doi:10.1086/169505. ISSN 0004-637X.
  22. ^ Meaburn, J. (November 1978). "H I, Molecular/H II Shells from 1 to 2000 pc Diameter: Wind-Driven or Supernova Remnants?". Astrophysics and Space Science. 59 (1): 193–214. Bibcode:1978Ap&SS..59..193M. doi:10.1007/BF00651050. ISSN 1572-946X. S2CID 121072103.
  23. ^ Rosado, M.; Georgelin, Y. P.; Georgelin, Y. M.; Laval, A.; Monnet, G. (April 1981). "Kinematics of ring-shaped nebulae in the LMC. I - The radial velocity field of N70". Astronomy and Astrophysics. 97 (2): 342–346. Bibcode:1981A&A....97..342R. eISSN 1432-0746. ISSN 0004-6361.
  24. ^ Zhang, Ning-Xiao; Chu, You-Hua; Williams, R. M.; Jiang, Bing; Chen, Yang; Gruendl, R. A. (24 July 2014). "Physical Nature of the [S II]-bright Shell Nebulae N70 and N185". The Astrophysical Journal. 792 (1): 9. arXiv:1407.6718. Bibcode:2014ApJ...792...58Z. doi:10.1088/0004-637X/792/1/58. ISSN 0004-637X. S2CID 118666688.
  25. ^ Skelton, Brooke P.; Waller, William H.; Gelderman, Richard F.; Brown, Larry; Woodgate, Bruce; Caulet, Adeline; Schommer, Robert A. (27 February 1999). "Emission-Line Properties of the Large Magellanic Cloud Bubble N70". The Publications of the Astronomical Society of the Pacific. 111 (758): 465–481. arXiv:astro-ph/9903001. Bibcode:1999PASP..111..465S. doi:10.1086/316346. ISSN 1538-3873. S2CID 120179184.
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