The Stellar Content of NGC 6789, A Blue Compact Dwarf Galaxy in the Local Void | Zendy

I. Drozdovsky | Zendy; R. E. SchulteLadbeck | Zendy; U. Hopp | Zendy; Mary M. Crone | Zendy; L. Greggio | Zendy

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The Stellar Content of NGC 6789, A Blue Compact Dwarf Galaxy in the Local Void

Author(s) -

I. Drozdovsky,

R. E. SchulteLadbeck,

U. Hopp,

Mary M. Crone,

L. Greggio

Publication year - 2001

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/320021

Subject(s) - physics , astrophysics , dwarf galaxy , astronomy , irregular galaxy , galaxy , metallicity , hubble space telescope , local group , stellar population , interacting galaxy , lenticular galaxy , star formation

We find that NGC6789 is the most nearby example of a Blue Compact Dwarfgalaxy known to date. With the help of WFPC2 aboard the Hubble Space Telescope,we resolve NGC6789 into over 15,000 point sources in the V and I bands. Theyoung stars of NGC6789 are found exclusively near the center of the galaxy. Thered giant population identified at large galacticentric radii yields a distanceof about 3.6 Mpc, a stellar metallicity [Fe/H] of about -2, and a minimum ageof about 1 Gyr. Despite its isolated location in the Local Void,its lowmetallicity, and its active star formation, the properties of NGC6789 areclearly not those of a galaxy in formation.Comment: 8 pages, 4 figures, ApJL Accepte

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