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NGC 5986

{{Short description| Globular cluster in the constellation Lupus }}

{{Infobox globular cluster

| name = NGC 5986

| image = 250px

| caption = NGC 5986 by Hubble Space Telescope; 3.5{{prime}} view

| credit =

| epoch = J2000

| class = VII

| constellation = Lupus

| ra = {{RA|15|46|03.00}}

| dec = {{DEC|–37|47|11.1}}

| dist_ly = {{Convert|10.4|kpc|kly|1|order=flip|abbr=on|lk=on}}

| appmag_v = 8.0

| absmag_v = −8.44

| size_v = 5'

| mass_msol = {{Val|5.99|e=5}}

| radius_ly =

| radius_tidal_arcminsec =

| v_hb =

| metal_fe = −1.35

| age = 12.16 Gyr

| notes =

| names = ESO 329-SC 018, NGC 5986

}}

NGC 5986 is a globular cluster of stars in the southern constellation of Lupus, located at a distance of approximately {{Convert|10.4|kpc|kly|disp=out|abbr=off|lk=on}} from the Sun. It was discovered by Scottish astronomer James Dunlop on May 10, 1826. John L. E. Dreyer described it as, "a remarkable object, a globular cluster, very bright, large, round, very gradually brighter middle, stars of 13th to 15th magnitude". Its prograde–retrograde orbit through the Milky Way galaxy is considered irregular and highly eccentric. It has a mean heliocentric radial velocity of +100 km/s. The galacto-centric distance is {{convert|5.2|kpc|kly|order=flip|abbr=on|lk=on}}, which puts it in the galaxy's inner halo.

This is relatively massive cluster has been poorly studied, at least as of 2017. It is moderately concentrated, with a core radius of {{val|28.2|ul=arcsecond}} and a projected half-light radius of {{val|58.8|u=arcsecond}}. The three dimensional half-mass radius is {{val|78.16|u=arcsecond|p=~}}. The cluster has a higher metallicity – what astronomers term the abundance of elements with higher atomic number then helium – compared to most other objects of its type. It may have at least 4–5 different stellar populations with distinct elemental compositions, and there is evidence that it has lost ~60–80% of its original mass.

Further reading

  • {{cite journal

| title=CCD Photometry of the Globular Cluster NGC 5986 and Its Post-Asymptotic Giant Branch and RR Lyrae Stars

| display-authors=1 | last1=Alves | first1=David R.

| last2=Bond | first2=Howard E. | last3=Onken | first3=Christopher

| journal=The Astronomical Journal

| volume=121 | issue=1 | pages=318–326 | date=January 2001

| arxiv=astro-ph/0010095 | bibcode=2001AJ....121..318A

| doi=10.1086/318030 | s2cid=119093584 }}

References

{{reflist|refs=

{{cite simbad

| title=NGC 5986 | access-date=2020-02-25 }}

{{cite web

| url=https://cseligman.com/text/atlas/ngc59a.htm#5986

| title=New General Catalogue objects: NGC 5950 - 5999

| last=Seligman | first=Courtney | website=cseligman.com

| access-date=2020-09-20 }}

{{cite journal

| title=Colour-magnitude diagrams of the inner halo globular clusters NGC 5986 and NGC 6712

| display-authors=1 | last1=Ortolani | first1=S.

| last2=Momany | first2=Y. | last3=Barbuy | first3=B.

| last4=Bica | first4=E. | last5=Catelan | first5=M.

| journal=Astronomy and Astrophysics

| volume=362 | pages=953–958 | date=October 2000

| bibcode=2000A&A...362..953O }}

{{cite journal

| title=A lack of close binaries among hot horizontal branch stars in globular clusters. M 80 and NGC 5986

| display-authors=1 | last1=Moni Bidin | first1=C.

| last2=Moehler | first2=S. | last3=Piotto | first3=G.

| last4=Momany | first4=Y. | last5=Recio-Blanco | first5=A.

| journal=Astronomy and Astrophysics

| volume=498 | issue=3 | pages=737–751 | date=May 2009

| arxiv=0903.2072 | bibcode=2009A&A...498..737M

| doi=10.1051/0004-6361/200810579 | s2cid=16080323 }}

{{cite journal

| title=Chemical Complexity in the Eu-enhanced Monometallic Globular NGC 5986

| display-authors=1 | last1=Johnson | first1=Christian I.

| last2=Caldwell | first2=Nelson | last3=Rich | first3=R. Michael

| last4=Mateo | first4=Mario | last5=Bailey | first5=John I., III

| last6=Olszewski | first6=Edward W. | last7=Walker | first7=Matthew G.

| journal=The Astrophysical Journal

| volume=842 | issue=1 | id=24 | pages=21 | date=June 2017

| arxiv=1705.10840 | bibcode=2017ApJ...842...24J

| doi=10.3847/1538-4357/aa7414 | s2cid=119279995 | doi-access=free }}

{{citation

| title=The ESO Multi-instrument Kinematic Survey (MIKiS) of Galactic Globular Clusters: Solid-body Rotation and Anomalous Velocity Dispersion Profile in NGC 5986

| last1=Lanzoni | first1=B. | last2=Ferraro | first2=F. R.

| last3=Mucciarelli | first3=A. | last4=Pallanca | first4=C.

| last5=Tiongco | first5=M. A. | last6=Varri | first6=A.

| last7=Vesperini | first7=E. | last8=Bellazzini | first8=M.

| last9=Dalessandro | first9=E. | last10=Origlia | first10=L.

| last11=Valenti | first11=E. | last12=Sollima | first12=A.

| last13=Lapenna | first13=E. | last14=Beccari | first14=G.

| display-authors=1 | journal=The Astrophysical Journal

| volume=865 | issue=1 | id=11 | pages=9 | date=September 2018

| arxiv=1808.01194 | bibcode=2018ApJ...865...11L

| doi=10.3847/1538-4357/aad810 | s2cid=119414659 | postscript=. | doi-access=free }}

{{citation

| title=The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters

| last1=Goldsbury | first1=Ryan | last2=Richer | first2=Harvey B.

| last3=Anderson | first3=Jay | last4=Dotter | first4=Aaron

| last5=Sarajedini | first5=Ata | last6=Woodley | first6=Kristin

| display-authors=1 | journal=The Astronomical Journal

| volume=140 | issue=6 | pages=1830–1837 |date=December 2010

| doi=10.1088/0004-6256/140/6/1830 | postscript=.

| bibcode=2010AJ....140.1830G | arxiv=1008.2755 | s2cid=119183070 }}

{{citation

| title=A Classification of Globular Clusters

| last1=Shapley | first1=Harlow | last2=Sawyer | first2=Helen B.

| journal=Harvard College Observatory Bulletin

| volume=849 | issue=849 | pages=11–14 | date=August 1927

| bibcode=1927BHarO.849...11S | postscript=. }}

{{citation

| title=Accreted versus in situ Milky Way globular clusters

| last1=Forbes | first1=Duncan A. | last2=Bridges | first2=Terry

| journal=Monthly Notices of the Royal Astronomical Society

| volume=404 | issue=3 | pages=1203–1214 | date=May 2010

| doi=10.1111/j.1365-2966.2010.16373.x | doi-access=free | postscript=.

| bibcode=2010MNRAS.404.1203F | arxiv=1001.4289 | s2cid=51825384 }}

{{citation

| title=Young Radio Pulsars in Galactic Globular Clusters

| last1=Boyles | first1=J. | last2=Lorimer | first2=D. R.

| last3=Turk | first3=P. J. | last4=Mnatsakanov | first4=R.

| last5=Lynch | first5=R. S. | last6=Ransom | first6=S. M.

| last7=Freire | first7=P. C. | last8=Belczynski | first8=K.

| display-authors=1 | journal=The Astrophysical Journal

| volume=742 | issue=1 | page=51 |date=November 2011

| doi=10.1088/0004-637X/742/1/51 | postscript=.

| bibcode=2011ApJ...742...51B | arxiv=1108.4402 | s2cid=118649860 }}

{{cite web

| title=NASA/IPAC Extragalactic Database

| work=Results for NGC 5986

| url=http://nedwww.ipac.caltech.edu/

| access-date=2007-04-06 }}

}}

{{commons category}}

External links

  • {{commons category-inline}}
  • {{WikiSky}}

{{Sky|15|46|3.4|-|37|47|10|1}}

{{Ngc60}}{{Lupus (constellation)}}

Category:Globular clusters

Category:Lupus (constellation)

5986