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| epoch = [[J2000]]
| epoch = [[J2000]]
| constellation = [[Scutum (constellation)|Scutum]]
| constellation = [[Scutum (constellation)|Scutum]]
| ra = {{RA|18|45|24.0}}<ref name="FroebrichScholz2013">{{cite journal|last1=Froebrich|first1=D.|last2=Scholz|first2=A.|title=The main sequence of three red supergiant clusters|journal=Monthly Notices of the Royal Astronomical Society|volume=436|issue=2|year=2013|pages=1116–1122|issn=0035-8711|doi=10.1093/mnras/stt1633}}</ref>
| ra = {{RA|18|45|20}}<ref name="simbad"/>
| dec = {{DEC|−03|24|43}}<ref name="simbad"/>
| dec = {{DEC|−03|23|13.2}}<ref name="FroebrichScholz2013"/>
| dist_pc = 7.0{{±|3.7|2.4}}[[Parsec|kpc]]<ref name=Alexander2009/>
| dist_pc = {{nowrap|6<ref name="FroebrichScholz2013"/> - 7.0{{±|3.7|2.4}}[[Parsec|kpc]]<ref name=Alexander2009/>}}
| dist_ly = 22{{±|12|8}}[[Light-year|kly]]
| dist_ly = 22{{±|12|8}}[[Light-year|kly]]
| appmag_v = not visible<ref name=Alexander2009/>
| appmag_v = not visible<ref name=Alexander2009/>
| size_v = ~2′<ref name=Alexander2009/>
| size_v = 1.8'<ref name="FroebrichScholz2013"/>
| mass_msol = ~2{{E-sp|4}}<ref name=Alexander2009/>
| mass_msol = ~2{{E-sp|4}}<ref name=Alexander2009/>
| radius_ly = ~2 pc<ref name=Alexander2009/>
| radius_ly = ~2 pc<ref name=Alexander2009/>
| age = 18–24 [[megayear|my]]<ref name=Alexander2009/>
| age = 18–24 [[megayear|my]]<ref name=Alexander2009/><ref name="FroebrichScholz2013"/>
| names =
| names =
}}
}}


'''RSGC3''' is a young massive [[open cluster]] belonging to the [[Milky Way]] galaxy. It was discovered in 2010 in the [[Spitzer Space Telescope|GLIMPSE]] survey data.<ref name=Alexander2009/><ref name=Clark2009/> The only members of the cluster that are currently identified are 8–14 [[red supergiant]]s—young massive stars undergoing [[helium burning]] in their cores. The cluster is located in the constellation [[Scutum]] at the distance of about 7&nbsp;[[Parsec#Parsecs and kiloparsecs|kpc]] from the Sun. It is likely situated at the intersection of the northern end of the [[Barred spiral galaxy|Long Bar]] of the Milky Way and the inner portion of the [[Scutum–Centaurus Arm]]—one of its two major spiral arms.<ref name=Alexander2009/><ref name=Clark2009/>
'''RSGC3''' is a young massive [[open cluster]] belonging to the [[Milky Way]] galaxy. It was discovered in 2010 in the [[Spitzer Space Telescope|GLIMPSE]] survey data.<ref name=Alexander2009/><ref name=Clark2009/> The cluster is located in the constellation [[Scutum]] at the distance of about 7&nbsp;[[Parsec#Parsecs and kiloparsecs|kpc]] from the Sun. It is likely situated at the intersection of the northern end of the [[Barred spiral galaxy|Long Bar]] of the Milky Way and the inner portion of the [[Scutum–Centaurus Arm]]—one of its two major spiral arms.<ref name=Alexander2009/><ref name=Clark2009/>


The age of RSGC3 is estimated at 18–24 million years. The observed red supergiants with the mass of about 12–15 [[solar mass]]es are [[type II supernova]] progenitors. The cluster is heavily obscured and have not been detected in the [[visible light]]. It lies close to other groupings of red supergiants known as [[RSGC1]], [[Stephenson 2]] and [[Alicante 8]]. The mass of RSGC3 is estimated at 20 thousand solar masses, which makes it one of the most massive open clusters in the Galaxy.<ref name=Alexander2009/>
The age of RSGC3 is estimated at 18–24 million years. The 16 detected [[red supergiant]] cluster members with masses of about {{solar mass|12–15}} are [[type II supernova]] progenitors. The cluster is heavily obscured and has not been detected in the [[visible light]]. It lies close to other groupings of red supergiants known as [[RSGC1]], [[Stephenson 2]] and [[Alicante 8]]. The total mass of RSGC3 is estimated at 20 thousand solar masses, which makes it one of the most massive open clusters in the Galaxy.<ref name=Alexander2009/>


More work has identified a population of at least 30 additional red supergiants in the vicinity of RSGC3, 7 of which are tightly grouped and have been assumed to form a cluster name Alicante 7.<ref name=around>{{cite doi|10.1051/0004-6361/201016102}}</ref> The number of red supergiants identified in the several small areas studied in this region of the sky forms a significant fraction of all those known in the galaxy, suggesting very unusual properties for the region near the end of the galactic bar.
More work has identified a population of at least 30 additional red supergiants in the vicinity of RSGC3, 7 of which are tightly grouped and have been assumed to form a cluster name Alicante 7.<ref name=around>{{cite doi|10.1051/0004-6361/201016102}}</ref> The number of red supergiants identified in the several small areas studied in this region of the sky forms a significant fraction of all those known in the galaxy, suggesting very unusual properties for the region near the end of the galactic bar.
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==References==
==References==
{{reflist|refs=
{{reflist|refs=
<ref name="simbad">{{cite web | title=SIMBAD Astronomical Database | work=Results for RSGC 3 | url=http://simbad.u-strasbg.fr/Simbad | accessdate=2010-11-15}}</ref>
<ref name=Alexander2009>{{cite doi|10.1088/0004-6256/137/6/4824}}</ref>
<ref name=Alexander2009>{{cite doi|10.1088/0004-6256/137/6/4824}}</ref>
<ref name=Clark2009>{{cite doi|10.1051/0004-6361/200911945}}</ref>
<ref name=Clark2009>{{cite doi|10.1051/0004-6361/200911945}}</ref>

Revision as of 14:12, 25 August 2015

RSGC3
Observation data (J2000 epoch)
Right ascension18h 45m 24.0s[1]
Declination−03° 23′ 13.2″[1]
Distance22+12
−8kly (6[1] - 7.0+3.7
−2.4kpc[2])
Apparent magnitude (V)not visible[2]
Apparent dimensions (V)1.8'[1]
Physical characteristics
Mass~2 × 104[2] M☉
Radius~2 pc[2]
Estimated age18–24 my[2][1]
Associations
ConstellationScutum
See also: Open cluster, List of open clusters

RSGC3 is a young massive open cluster belonging to the Milky Way galaxy. It was discovered in 2010 in the GLIMPSE survey data.[2][3] The cluster is located in the constellation Scutum at the distance of about 7 kpc from the Sun. It is likely situated at the intersection of the northern end of the Long Bar of the Milky Way and the inner portion of the Scutum–Centaurus Arm—one of its two major spiral arms.[2][3]

The age of RSGC3 is estimated at 18–24 million years. The 16 detected red supergiant cluster members with masses of about 12–15 M☉ are type II supernova progenitors. The cluster is heavily obscured and has not been detected in the visible light. It lies close to other groupings of red supergiants known as RSGC1, Stephenson 2 and Alicante 8. The total mass of RSGC3 is estimated at 20 thousand solar masses, which makes it one of the most massive open clusters in the Galaxy.[2]

More work has identified a population of at least 30 additional red supergiants in the vicinity of RSGC3, 7 of which are tightly grouped and have been assumed to form a cluster name Alicante 7.[4] The number of red supergiants identified in the several small areas studied in this region of the sky forms a significant fraction of all those known in the galaxy, suggesting very unusual properties for the region near the end of the galactic bar.

References

  1. ^ a b c d e Froebrich, D.; Scholz, A. (2013). "The main sequence of three red supergiant clusters". Monthly Notices of the Royal Astronomical Society. 436 (2): 1116–1122. doi:10.1093/mnras/stt1633. ISSN 0035-8711.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  2. ^ a b c d e f g h Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1088/0004-6256/137/6/4824, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with |doi=10.1088/0004-6256/137/6/4824 instead.
  3. ^ a b Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1051/0004-6361/200911945, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with |doi=10.1051/0004-6361/200911945 instead.
  4. ^ Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1051/0004-6361/201016102, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with |doi=10.1051/0004-6361/201016102 instead.


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