2015AJ....149...15O

Query : 2015AJ....149...15O

2015AJ....149...15O - Astron. J., 149, 15 (2015/January-0)

NGC 7789: an open cluster case study.

OVERBEEK J.C., FRIEL E.D., JACOBSON H.R., JOHNSON C.I., PILACHOWSKI C.A. and MESZAROS S.

Abstract (from CDS):

We have obtained high-resolution spectra of 32 giants in the open cluster NGC 7789 using the Wisconsin-Indiana-Yale-NOAO Hydra spectrograph. We explore differences in atmospheric parameters and elemental abundances caused by the use of the linelist developed for the Gaia-ESO Survey (GES) compared to one based on Arcturus used in our previous work. [Fe/H] values decrease when using the GES linelist instead of the Arcturus-based linelist; these differences are probably driven by systematically lower (: (-0.1 dex) GES surface gravities. Using the GES linelist we determine abundances for 10 elements–Fe, Mg, Si, Ca, Ti, Na, Ni, Zr, Ba, and La. We find the cluster's average metallicity [Fe/H] = 0.03±0.07 dex, in good agreement with literature values, and a lower [Mg/Fe] abundance than has been reported before for this cluster (0.11±0.05 dex). We also find the neutron-capture element barium to be highly enhanced–[Ba/Fe] = +0.48±0.08–and disparate from cluster measurements of neutron-capture elements La and Zr (-0.08±0.05 and 0.08±0.08, respectively). This is in accordance with recent discoveries of supersolar Ba enhancement in young clusters along with more modest enhancement of other neutron-capture elements formed in similar environments.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: abundances - open clusters and associations: individual: NGC 7789 - stars: abundances

VizieR on-line data: <Available at CDS (J/AJ/149/15): table1.dat table2.dat table3.dat table4.dat table5.dat table6.dat>

Errata: erratum vol. 149, art. 177 (2015)

Simbad objects: 44

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Number of rows : 44
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2417 1
2 IC 4651 OpC 17 24 48.5 -49 55 23           ~ 374 0
3 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
4 * 35 Peg PM* 22 27 51.5231162634 +04 41 44.404460456 6.74 5.86 4.80 4.02 3.46 K1-III-IV 276 0
5 NGC 7789 14 * 23 56 07.7664620520 +56 36 05.790197160     13.169   11.857 ~ 13 0
6 NGC 7789 47 * 23 56 14.0040907584 +56 48 41.445909288     13.036   11.643 ~ 14 0
7 NGC 7789 136 * 23 56 29.3060208672 +56 45 43.219098936   14.6 13.401   12.105 ~ 6 0
8 NGC 7789 152 * 23 56 32.0106729600 +56 32 58.966465704   13.10 12.00   10.382 ~ 11 0
9 NGC 7789 160 SB* 23 56 33.0337096968 +56 44 33.182001744   14.29 13.0343   11.686 ~ 12 0
10 NGC 7789 193 RG* 23 56 38.0698216200 +56 49 40.462407624   14.03 12.6063   11.092 ~ 13 0
11 NGC 7789 232 RG* 23 56 43.0430402280 +56 50 47.685541128   14.41 13.107   11.712 ~ 31 0
12 NGC 7789 244 * 23 56 44.5168872720 +56 42 53.552723796   14.39 13.1599   11.811 ~ 13 0
13 NGC 7789 297 RG* 23 56 50.5287592512 +56 49 20.754876360   13.92 12.811 12.46 11.518 ~ 32 0
14 NGC 7789 319 SB* 23 56 54.6546006552 +56 41 20.078268648     12.864   11.595 ~ 14 0
15 NGC 7789 337 * 23 56 56.5487077632 +56 38 09.513493620   13.57 12.289   10.879 ~ 8 0
16 NGC 7789 353 RG* 23 56 57.5153755656 +56 45 27.139175388     12.592   11.075 ~ 50 0
17 NGC 7789 415 SB* 23 57 03.2501165215 +56 45 57.912486452   12.55 10.6648   8.481 M1.0III 44 0
18 NGC 7789 468 * 23 57 08.0503461336 +56 43 21.602897040   12.75 11.6115   9.722 K4III 46 0
19 NGC 7789 476 RG* 23 57 08.9526221314 +56 48 50.332490009   14.38 13.1774   11.831 ~ 32 0
20 NGC 7789 501 RG* 23 57 11.1348067512 +56 44 29.273305596   12.97 11.26 10.66 9.365 K5III 46 0
21 NGC 7789 549 RG* 23 57 14.0025494832 +56 40 58.646633376   13.7 12.2895   10.776 K2III 35 0
22 NGC 7789 575 RG* 23 57 16.9215760032 +56 46 19.916182380   13.51 12.1003   10.591 K2III 34 0
23 2MASS J23571728+5645333 RG* 23 57 17.2845748536 +56 45 33.189067152     13.203   11.921 ~ 23 0
24 2MASS J23571729+5636481 RG* 23 57 17.2924070472 +56 36 48.178424952     14.432   13.022 ~ 11 0
25 NGC 7789 601 * 23 57 19.1126486496 +56 35 56.187798396   13.74 12.373   10.906 ~ 14 0
26 NGC 7789 OpC 23 57 19.4 +56 43 28   7.68 6.7     ~ 575 0
27 NGC 7789 626 * 23 57 21.0700741056 +56 35 02.880385512     12.962   11.631 G9III 12 0
28 NGC 7789 665 * 23 57 24.1797282264 +56 39 36.132932484     12.913   11.625 G8III 20 0
29 NGC 7789 669 RG* 23 57 24.4766316792 +56 48 30.495586788   13.04 11.4563   9.74 K4III 41 0
30 NGC 7789 732 * 23 57 29.5508446872 +56 42 23.505669468   13.92 12.6944   11.369 ~ 28 0
31 NGC 7789 751 AB? 23 57 30.7854423160 +56 50 51.418660322   12.66 10.8783   8.768 M1.0III 26 0
32 NGC 7789 774 * 23 57 32.6289167736 +56 44 05.784075960     13.242   11.968 ~ 12 0
33 NGC 7789 859 SB* 23 57 40.5612085128 +56 45 23.107928796   14.02 12.6385   11.132 K2III 37 0
34 NGC 7789 902 * 23 57 45.8255448000 +56 50 41.368704180     13.164   11.787 ~ 19 0
35 2MASS J23574944+5634509 * 23 57 49.4385538474 +56 34 50.731022648     13.502   12.053 ~ 15 0
36 2MASS J23575005+5643052 * 23 57 50.0590703616 +56 43 05.298480912     12.884   11.572 ~ 9 0
37 NGC 7789 957 * 23 57 50.4616302168 +56 39 22.636292796     13.084   11.767 ~ 14 0
38 2MASS J23575212+5646575 * 23 57 52.1375865744 +56 46 57.642967236     12.620   11.076 ~ 13 0
39 2MASS J23575501+5644323 RG* 23 57 55.0189964496 +56 44 32.426556108     12.208   10.760 ~ 10 0
40 2MASS J23580015+5650125 RG* 23 58 00.1705050211 +56 50 12.592624213     11.986   10.368 ~ 29 0
41 NGC 7789 1071 RG* 23 58 01.3301334528 +56 39 22.003788816   13.89 12.5566   11.168 ~ 22 0
42 NGC 7789 1082 RG* 23 58 02.7570176064 +56 47 20.936951412     12.933   11.497 ~ 25 0
43 2MASS J23581471+5651466 RG* 23 58 14.7154514856 +56 51 46.686956868     11.576   9.887 ~ 26 0
44 NGC 7789 1150 SB* 23 58 15.5939275608 +56 49 12.331152768     12.918   11.475 ~ 14 0

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