| 词条 | Sculptor Dwarf Galaxy |
| 释义 |
| name =Sculptor Dwarf Elliptical Galaxy | image =Sculptor Dwarf Galaxy.jpg | image_size =300px | epoch = J2000 | ra = {{RA|01|00|09.3}}[1] | dec = {{DEC|-33|42|33}}[1] | constellation name = Sculptor | z = 110 ± 1 km/s[1] | dist_ly = 290 ± 30 kly (90 ± 10 kpc)[2][3] | type = E[1] | appmag_v = 10.1[1] | size_v = 39′.8 × 30′.9[1] | notes = | names = Sculptor Dwarf Spheroidal,[1] PGC 3589,[1] MCG-06-03-015 }} The Sculptor Dwarf Galaxy (also known as Sculptor Dwarf Elliptical Galaxy or the Sculptor Dwarf Spheroidal Galaxy) is a dwarf spheroidal galaxy that is a satellite of the Milky Way. The galaxy lies within the constellation Sculptor. It was discovered in 1937 by American astronomer Harlow Shapley using the 24-inch Bruce refractor at Boyden Observatory.[4][5] The galaxy is located about 290,000 light-years away from the Solar System. The Sculptor Dwarf contains only 4 percent of the carbon and other heavy elements in our own galaxy, the Milky Way, making it similar to primitive galaxies seen at the edge of the universe.[6] MetallicityThe metallicity of Sculptor dwarf appears to be broken up into two distinct groups, one with [Fe/H] = -2.3 and the other with [Fe/H] = -1.5.[7] Similar to many of the other Local Group galaxies, the older metal-poor segment appears more extended than the younger metal-rich segment.[8] MeasurementsUsing both Hubble Telescope and Gaia observations 12 years apart, about 100 stars in the galaxy were mapped accurately, and 3D motions of about 10 of those stars enable trajectories to be mapped as well.[9] GalleryReferences1. ^1 2 3 4 5 6 7 {{cite web | title=NASA/IPAC Extragalactic Database | work=Results for PGC 3589 | url=http://nedwww.ipac.caltech.edu/ | accessdate=2006-12-03}} 2. ^{{cite journal |author1=I. D. Karachentsev |author2=V. E. Karachentseva |author3=W. K. Hutchmeier |author4=D. I. Makarov | title=A Catalog of Neighboring Galaxies | journal=Astronomical Journal | date=2004 | volume=128 | issue=4 | pages=2031–2068 | bibcode=2004AJ....127.2031K | doi=10.1086/382905 | type=abstract }} 3. ^{{cite journal | author=Karachentsev, I. D.| author2=Kashibadze, O. G. | title=Masses of the local group and of the M81 group estimated from distortions in the local velocity field | journal=Astrophysics | date=2006 | volume=49 | issue=1 | pages=3–18 | bibcode=2006Ap.....49....3K | doi=10.1007/s10511-006-0002-6 }} 4. ^Shapley, H., (1938) Harvard Bull. 908. 5. ^{{cite journal | author = Shapley H | date = 1938 | title = Two Stellar Systems of a New Kind | url = | journal = Nature | volume = 142 | issue = 3598| pages = 715–6 | bibcode = 1938Natur.142..715S | doi=10.1038/142715b0}} 6. ^Astronomers Detect Dust Around a Primitive Star, Shedding New Light on Universe’s Origins Newswise, Retrieved on January 19, 2008. 7. ^{{cite journal |author=S.R. Majewski |display-authors=etal |title=An Internal Second-Parameter Problem in the Sculptor Dwarf Spheroidal Galaxy |date=20 July 1999 |journal=The Astrophysical Journal |volume=520 |issue=1 |arxiv=astro-ph/9905238 |bibcode = 1999ApJ...520L..33M |doi = 10.1086/312133 }} 8. ^{{Cite journal | last1 = van den Bergh | first1 = Sidney | authorlink1 = Sidney van den Bergh | title = Updated Information on the Local Group | date = April 2000 | journal = The Publications of the Astronomical Society of the Pacific | volume = 112 | issue = 770 | bibcode = 2000PASP..112..529V | pages = 529–536 | doi = 10.1086/316548 | postscript = |arxiv = astro-ph/0001040 }} 9. ^[https://www.spacetelescope.org/news/heic1719/ Hubble and Gaia team up to measure 3D stellar motion with record-breaking precision] 10. ^{{cite web|title=Hubble and Gaia team up to measure 3D stellar motion with record-breaking precision|url=https://www.spacetelescope.org/news/heic1719/|website=www.spacetelescope.org|accessdate=29 November 2017}} 11. ^{{cite web|title=Sculptor Dwarf Galaxy|url=http://www.eso.org/public/images/eso1536a/|accessdate=17 September 2015}} External links
8 : Dwarf spheroidal galaxies|Local Group|Milky Way Subgroup|Sculptor (constellation)|Principal Galaxies Catalogue objects|MCG objects|ESO objects|Astronomical objects discovered in 1937 |
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