“NGC 3729”的意思、由来-开放百科全书

NGC 3729 is a barred spiral galaxy located in the constellation Ursa Major. It is located at a distance of circa 65 million light years from Earth, which, given its apparent dimensions, means that NGC 3729 is about 60,000 light years across. It was discovered by William Herschel οn

NGC 3729 has a bright nucleus embedded in a bar which measures 0.5 x 0.1 arcminutes. At the end of the bar lies a ring with knots. The outer part of the galaxy is formed by an asymmetric faint nebulosity with condensations.^[4] It is possible that the condensation is a disturbed satellite galaxy.^[5] In the centre of NGC 3729 is predicted to lie an intermediate-mass black hole, whose mass is estimated to be between 4 and 400 thousands {{solar mass|link=yes}} (10^{4.6 ± 1.0} {{solar mass}}) based on Ks-band bulge luminosity.^[6] The galaxy has an inner ring which emits in far ultraviolet and H-alpha, which are considered to be markers of recent star formation activity.^[7]

NGC 3729 is member of the M109 Group^[8] which is part of the south Ursa Major groups, part of the Virgo Supercluster.^[9] It forms a pair with NGC 3718, which lies 11.5 arcminutes to the west.^[4] It is possible the two galaxies interacted in the past.^[10]

References

1. ^¹²³⁴⁵⁶{{cite web | title=NASA/IPAC Extragalactic Database | work=Results for NGC 3729 | url=http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+3729 | accessdate=2019-01-18 }}
2. ^{{cite web |title=Revised NGC Data for NGC 3729 |url=http://spider.seds.org/ngc/revngcic.cgi?NGC3729 |website=spider.seds.org |accessdate=25 November 2018}}
3. ^NGC 3729 cseligman.com
4. ^¹{{cite book |author1=de Vaucouleurs, Gerard Henri |author2=de Vaucouleurs, Antoinette |author3=Shapley, Harlow |title=Reference catalogue of bright galaxies |date=1964 |publisher = University of Texas Press | location = Austin |bibcode=1964rcbg.book.....D}}
5. ^{{cite journal |last1=Morales |first1=Gustavo |last2=Martínez-Delgado |first2=David |last3=Grebel |first3=Eva K. |last4=Cooper |first4=Andrew P. |last5=Javanmardi |first5=Behnam |last6=Miskolczi |first6=Arpad |title=Systematic search for tidal features around nearby galaxies |journal=Astronomy & Astrophysics |date=29 June 2018 |volume=614 |pages=A143 |doi=10.1051/0004-6361/201732271|arxiv=1804.03330}}
6. ^{{cite journal |last1=Graham |first1=Alister W. |last2=Scott |first2=Nicholas |title=The MBH-lspheroid relation at high and low masses, the quadratic growth of black holes, and intermediate-mass black hole candidates |journal=The Astrophysical Journal |date=1 February 2013 |volume=764 |issue=2 |pages=151 |doi=10.1088/0004-637X/764/2/151}}
7. ^{{cite journal |last1=Comerón |first1=S. |title=Inner rings in disc galaxies: dead or alive |journal=Astronomy & Astrophysics |date=9 July 2013 |volume=555 |pages=L4 |doi=10.1051/0004-6361/201321983|bibcode=2013A&A...555L...4C |arxiv=1306.4515 }}
8. ^{{cite journal|last1=Makarov|first1=Dmitry|last2=Karachentsev|first2=Igor|title=Galaxy groups and clouds in the local (z∼ 0.01) Universe|journal=Monthly Notices of the Royal Astronomical Society|date=21 April 2011|volume=412|issue=4|pages=2498–2520|doi=10.1111/j.1365-2966.2010.18071.x|url=http://www.sao.ru/hq/dim/groups/galaxies.dat|bibcode=2011MNRAS.412.2498M|arxiv = 1011.6277 }}
9. ^{{cite web|title=The Ursa Major Groups|url=http://www.atlasoftheuniverse.com/galgrps/uma.html|website=www.atlasoftheuniverse.com}}
10. ^{{cite journal |last1=Markakis |first1=K. |last2=Dierkes |first2=J. |last3=Eckart |first3=A. |last4=Nishiyama |first4=S. |last5=Britzen |first5=S. |last6=García-Marín |first6=M. |last7=Horrobin |first7=M. |last8=Muxlow |first8=T. |last9=Zensus |first9=J. A. |title=Subaru and e-Merlin observations of NGC 3718 |journal=Astronomy & Astrophysics |date=20 July 2015 |volume=580 |pages=A11 |doi=10.1051/0004-6361/201425077}}

References

External links