Arp Madore 2

(Arp-Mado. 2; MWSC 1294; AM 2; ESO 368 07)

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0.53 UTI
0.76
CN
0.5
Cdens
0.62
CC3
0.39
Clit
1.0
Cdup
N50 (P>50% members) 131
Stellar density (N50/rad) 2.5 [N/pc2]
C3 classification AC
  • CN 0.76 Rich
  • Cdens 0.5 Moderately dense
  • CC3 0.62 Intermediate quality
  • Clit 0.39 Poorly studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
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Arp Madore 2 is a rich, moderately dense object of intermediate C3 quality. Its parallax locates it at a very large distance, well below the mid-plane, affected by moderate extinction. It is catalogued as a very massive, near-solar metallicity, old cluster (see Parameters). It is poorly studied in the literature.

Note: This object contains blue stragglers according to at least one source.

Perren et al. (2022)
The CMD shows a well-traced TO and RGB with a short main sequence and a prominent RC at G=17. ASteCA gives ~11 kpc, 4.1 Gyr, and [Fe/H]=−0.33. Ortolani 1995 reports 12.4 kpc and [Fe/H]~−0.3 (no specific age); Lee 1997 finds 8.87 kpc, 5 Gyr, and [Fe/H]=−0.51; CG20 gives 11.7 kpc and 3.0 Gyr. ASteCA distance is a good match for CG20 and falls within the range of the prior studies. The metallicity agrees with the sub-solar values reported by Ortolani et al. and Lee.

Data
🔍 Search references for Arp Madore 2 in: SciX Simbad
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Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 114.686 -33.845 0.065 -0.528 1.263 125.142
Just et al. 2023 114.671 -33.833 – – – –
Perren et al. 2022 114.683 -33.845 – – – –
Jadhav & Subramaniam 2021 114.683 -33.845 – – – –
Cantat-Gaudin et al. 2020 114.683 -33.845 0.039 -0.513 1.225 –
Cantat-Gaudin & Anders 2020 114.683 -33.845 0.039 -0.513 1.225 –
Bica et al. 2019 114.685 -33.84 – – – –
Cantat-Gaudin et al. 2018 114.683 -33.845 0.039 -0.513 1.225 –
Kharchenko et al. 2016 114.671 -33.833 – – – –
Dias et al. 2014 114.692 -33.843 – -3.51 1.63 –
Kharchenko et al. 2013 114.676 -33.835 – 0.52 7.96 –
Bukowiecki et al. 2011 114.679 -33.846 – – – –
van den Bergh 2006 114.692 -33.843 – – – –
Dias et al. 2002 114.692 -33.843 – 0.52 7.96 –

💡 Note: The UCC values are estimated from its identified members.

Reference Year Dist [kpc] Av [mag] DAv [mag] Age [Myr] [Fe/H] [dex] Mass [Msun] Bfrac BSS
UCC 99999– 13.34 1.8 – 2176 -0.330 9800 0.34 2
Just et al. 2023 – – – 2163 – 15311 – –
Perren et al. 2022 10.91 1.99 – 4074 -0.330 9800 0.34 –
Jadhav & Subramaniam 2021 11.75 1.49 – 3020 – 9086 – 2(1)
Cantat-Gaudin et al. 2020 11.75 1.49 – 3020 – – – –
Kounkel et al. 2020 12.16 1.22 – 1230 – – – –
Cantat-Gaudin & Anders 2020 14.62 – – – – – – –
Cantat-Gaudin et al. 2018 14.62 – – – – – – –
Kharchenko et al. 2016 13.34 1.80 – 2163 – – – –
Kharchenko et al. 2013 13.34 1.80 – 2163 – – – –
Bukowiecki et al. 2011 11.97(1) 1.48 – 2239 – – – –
van den Bergh 2006 13.34 1.80 – 2188 – – – –
Dias et al. 2002 13.34 1.80 – 2163 – – – –

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization
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Arp Madore 2 UCC
Arp Madore 2 CANTAT20
Galactocentric position diagram