Look here for all you need to know to go above and beyond (our galaxy) to find some extraordinary extragalactic globular clusters!
Off to hunt extragalactic globular clusters? Below you'll find an abundance of resources compiled by Contributing Editor Steve Gottlieb to help you plan and execute your observing sessions. We included an abbreviated data table with Gottlieb's article on extragalatic globular clusters that ran in the November 2018 issue of Sky & Telescope. Here you'll find a more exhaustive table; it includes a listing of all Local Group galaxies that contain globulars. The table is also available for download as an Excel file. For those of you who are feeling truly inspired, consider downloading Gottlieb's data on 75 brightest globulars in M31 as well.
Census of Local Group Globular Clusters | |||||||
Galaxy | Type | # GC | Globular Cluster | Mag(v) | RA | Dec. | Note |
Milky Way | SBbc | 160 | NGC 5139 | 3.7 | 13 26.8 | -47 29 | G |
M31 | Sb | >500 | G1 | 13.8 | 00 32.8 | +39 35 | A |
PAndAS-53/54 | 15.5 | 01 18.0 | +39 15 | ||||
Martin-GC1 | 15.5 | 00 50.7 | +32 55 | ||||
M33 | Scd | ~50 | U49 | 16.3 | 01 33.8 | +30 48 | A |
LMC | Irr | 15 | NGC 1835 | 10.2 | 05 05.1 | -69 24 | G |
NGC 1916 | 10.4 | 05 18.6 | -69 24 | ||||
Reticulum | 14.7 | 04 36.2 | -58 51 | ||||
M110 (NGC 205) | dE | 11 | G73 | 14.9 | 00 40.9 | +41 41 | A |
NGC 147 | dE | 10 | Hodge III | 16.8 | 00 33.3 | +48 27 | A |
NGC 185 | dE | 8 | Hodge V | 16.7 | 00 39.2 | +48 23 | A |
NGC 6822 | dIrr | 8 | SC 7 | 14.8 | 19 46.0 | -14 33 | L |
Hubble VII | 16.3 | 19 44.9 | -14 49 | ||||
SC 6 | 15.4 | 19 45.6 | -14 41 | ||||
Fornax Dwarf | dSph | 5 | NGC 1049 | 12.6 | 02 39.8 | -34 15 | G |
Fornax-2 | 14.1 | 02 38.7 | -34 49 | ||||
Fornax-4 | 13.6 | 02 40.1 | -34 32 | ||||
Fornax-5 | 13.6 | 02 42.4 | -34 06 | ||||
Sgr Dwarf | dSph | 4 | M54 | 7.7 | 18 55.1 | -30 29 | G |
SMC | dIrr | 1 | NGC 121 | 11.2 | 00 26.8 | -71 32 | G |
WLM | dIrr | 1 | WLM-1 | 16.1 | 00 01.9 | -15 27 | G |
GCs in Nov 2018 S&T article are in bold | |||||||
First row of each galaxy displays its brightest globular | |||||||
Code for Note column | |||||||
G = Milky Way satellite | |||||||
A = M31 satellite | |||||||
L = isolated member of the Local Group | |||||||
Web Pages
Steve Gottlieb's personal website contains a wealth of observing data. Be sure and check it out! You'll find the following pages particular relevant to globular clusters:
- The Brightest Globular Cluster in Eight Nearby Galaxies
- Globular Clusters in the Andromeda Galaxy
- Globular Clusters in M33
Professional Literature
Find here a collection of research papers and databases availabe online and used by Gottlieb while writing about extragalactic globulars.
- Paul Hodge, Altas of the Andromeda Galaxy (Seattle: University of Washington Press, 1981)
- Revised Bologna Catalogue of M31 Globular Clusters and Candidates (ver. 5, August 2012)
- Baumgaurt, et al., Massive Clusters in the LMC (2013)
- Asa'd, Vazdekis, and Zeinelabdin, Ages of LMC Star Clusters using ASAD2 (2004)
- Strader, et al., Spectroscopy of Globular Clusters in the Fornax Dwarf Galaxy (2003)
- de Boer and Fraser, Four and One More: The Formation History and Total Mass of Globular Clusters in the Fornax dSph (2016)
- Edwin Hubble, N.G.C. 6822, A Remote Stellar System (1925)
- Hwang, et al., Extended Star Clusters in the Remote Halo of the Intriguing Dwarf Galaxy NGC 6822 (2011)
- Huxor, et al., Three Newly Discovered Globular Clusters in NGC 6822 (2007)
- Gebhardt, Rich, and Ho, A 20 Thousand Solar Mass Black Hole in the Stellar Cluster G1 (2002)
- Ibata, Gilmore, and Irwin, A Dwarf Satellite Galaxy in Sagittarius (1994)
- Carraro and Bensby, Old Open Clusters in the Sagittarius dSph Tidal Stream — Kith or Kin? (2009)
- Law and Majewski, Assessing the Milky Way Satellites Associated with the Sagittarius Dwarf Spheroidal Galaxy (2010)
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