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NGC 6604

Coordinates:Sky map18h 18m 03s, −12° 14.5′ 00″
From Wikipedia, the free encyclopedia
Open cluster in the constellation of Serpens
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NGC 6604
NGC 6604 and its surroundings taken by the Wide Field Imager attached to the 2.2-metreMPG/ESO telescope at theLa Silla Observatory in Chile
Observation data (J2000epoch)
Right ascension18h 18m 03.0s[1]
Declination−12° 14′ 30″[1]
Distance4,580 ly (1,403 pc)[2]
Apparent magnitude (V)6.5[3]
Physical characteristics
Estimated age6.5 Myr[1]
Other designationsNGC 6604,Cr 373, MM 23, OCl 56, C 1815-122, CTB 50, NRL 17, [KPR2004b] 439, Cl Mrk 39, LMH 24, OCISM 11[4]
Associations
ConstellationSerpens[5]
See also:Open cluster,List of open clusters

NGC 6604 is a young[6]open cluster of stars in theequatorialconstellation ofSerpens, positioned about 1.5° north of theEagle Nebula (NGC 6611).[7] The cluster was discovered byWilliam Herschel on July 15, 1784.[8] It is located at a distance of 4,580[2] light years from theSun, about 210 ly (65 pc) above thegalactic plane.[7] NGC 6604 forms the densest part of the Ser OB2 association of co-moving stars.[9]

This cluster is fairly compact with aTrumpler class of I3p,[6] and is still undergoingstar formation.[10][7] It lies at the heart of anH II region with the identifier S54, and the two are most likely linked.[6] The cluster has an estimated age of 6.5[1] million years and contains several massive stars of theOB type.[6] One of these is the high mass triple star system HD 167971, which includes the over-contacteclipsing binary MY Ser. It is one of the most luminous stars in the galaxy.[10] HD 168112 is another colliding-wind binary in the cluster; both systems are over-luminous in theirX-ray emission.[11]

References

[edit]
  1. ^abcdWu, Zhen-Yu; et al. (November 2009)."The orbits of open clusters in the Galaxy".Monthly Notices of the Royal Astronomical Society.399 (4):2146–2164.arXiv:0909.3737.Bibcode:2009MNRAS.399.2146W.doi:10.1111/j.1365-2966.2009.15416.x.S2CID 6066790.
  2. ^abZucker, Catherine; et al. (January 2020). "A compendium of distances to molecular clouds in the Star Formation Handbook".Astronomy & Astrophysics.633: 16.arXiv:2001.00591.Bibcode:2020A&A...633A..51Z.doi:10.1051/0004-6361/201936145.S2CID 209832293. A51.
  3. ^Gilmour, Jess K. (2012).The Practical Astronomer's Deep-sky Companion. Springer London. p. 104.ISBN 9781447100713.
  4. ^"NGC 6604".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved2021-01-03.
  5. ^"The star cluster NGC 6604 and its surroundings".ESO Press Release. Retrieved26 April 2012.
  6. ^abcdBarbon, R.; et al. (June 2000). "Spectroscopy and BVI_C photometry of the young open cluster NGC 6604".Astronomy and Astrophysics Supplement.144 (3):451–456.arXiv:astro-ph/0004012.Bibcode:2000A&AS..144..451B.doi:10.1051/aas:2000193.S2CID 6514418.
  7. ^abcReipurth, B. (December 2008). Reipurth, Bo (ed.).The Young Cluster NGC 6604 and the Serpens OB2 Association(PDF). The Southern Sky ASP Monograph Publications. Vol. 5. p. 590.Bibcode:2008hsf2.book..590R. Retrieved2022-01-05.{{cite book}}:|work= ignored (help)
  8. ^Seligman, Courtney."NGC Objects: NGC 6600 - 6649".Celestial Atlas. Retrieved2022-01-05.
  9. ^De Becker, M.; et al. (July 2005). "An XMM-Newton observation of the multiple system HD 167971 (O5-8V + O5-8V + (O8I)) and the young open cluster NGC 6604".Astronomy and Astrophysics.437 (3):1029–1046.arXiv:astro-ph/0503471.Bibcode:2005A&A...437.1029D.doi:10.1051/0004-6361:20052810.S2CID 16980385.
  10. ^abIbanoglu, C.; et al. (November 2013)."MY Serpentis: a high-mass triple system in the Ser OB2 association".Monthly Notices of the Royal Astronomical Society.436 (1):750–758.arXiv:1308.4971.Bibcode:2013MNRAS.436..750I.doi:10.1093/mnras/stt1616.
  11. ^De Becker, M. (July 2015)."Long-term XMM-Newton investigation of two particle-accelerating colliding-wind binaries in NGC 6604: HD 168112 and HD 167971".Monthly Notices of the Royal Astronomical Society.451 (1):1070–1080.arXiv:1506.01493.Bibcode:2015MNRAS.451.1070D.doi:10.1093/mnras/stv1034.

External links

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  • Media related toNGC 6604 at Wikimedia Commons
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