2019A&A...627A.178F


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.19CET16:54:52

2019A&A...627A.178F - Astronomy and Astrophysics, volume 627A, 178-178 (2019/7-2)

H-band discovery of additional second-generation stars in the Galactic bulge globular cluster NGC 6522 as observed by APOGEE and Gaia.

FERNANDEZ-TRINCADO J.G., ZAMORA O., SOUTO D., COHEN R.E., DELL'AGLI F., GARCIA-HERNANDEZ D.A., MASSERON T., SCHIAVON R.P., MESZAROS S., CUNHA K., HASSELQUIST S., SHETRONE M., SCHIAPPACASSE ULLOA J., TANG B., GEISLER D., SCHLEICHER D.R.G., VILLANOVA S., MENNICKENT R.E., MINNITI D., ALONSO-GARCIA J., MANCHADO A., BEERS T.C., SOBECK J., ZASOWSKI G., SCHULTHEIS M., MAJEWSKI S.R., ROJAS-ARRIAGADA A., ALMEIDA A., SANTANA F., OELKERS R.J., LONGA-PENA P., CARRERA R., BURGASSER A.J., LANE R.R., ROMAN-LOPES A., IVANS I.I. and HEARTY F.R.

Abstract (from CDS):

We present an elemental abundance analysis of high-resolution spectra for five giant stars spatially located within the innermost regions of the bulge globular cluster NGC 6522 and derive Fe, Mg, Al, C, N, O, Si, and Ce abundances based on H-band spectra taken with the multi-object APOGEE-north spectrograph from the SDSS-IV Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey. Of the five cluster candidates, two previously unremarked stars are confirmed to have second-generation (SG) abundance patterns, with the basic pattern of depletion in C and Mg simultaneous with enrichment in N and Al as seen in other SG globular cluster populations at similar metallicity. In agreement with the most recent optical studies, the NGC 6522 stars analyzed exhibit (when available) only mild overabundances of the s-process element Ce, contradicting the idea that NGC 6522 stars are formed from gas enriched by spinstars and indicating that other stellar sources such as massive AGB stars could be the primary polluters of intra-cluster medium. The peculiar abundance signatures of SG stars have been observed in our data, confirming the presence of multiple generations of stars in NGC 6522.

Abstract Copyright: © J. G. Fernández-Trincado et al. 2019

Journal keyword(s): stars: abundances - stars: Population II - globular clusters: individual: NGC 6522 - Galaxy: formation - Galaxy: structure

Simbad objects: 14

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Number of rows : 14

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 107 GlC 16 32 31.86 -13 03 13.6   9.96 8.85     ~ 716 0
2 ESO 520-21 GlC 17 43 42.20 -26 13 21.0           ~ 149 0
3 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 710 1
4 ISOGAL-P J180323.6-300159 AB* 18 03 23.5581380761 -30 01 59.006808411     13.804   11.744 ~ 34 0
5 NAME Baade Window reg 18 03.5 -30 01           ~ 547 3
6 NGC 6522 GlC 18 03 34.08 -30 02 02.3   10.68 9.48     ~ 466 1
7 UCAC3 120-361873 * 18 03 36.5963155073 -30 02 16.463106350     15.98 15.56 15.40 ~ 13 0
8 OGLE BLG-LPV-194566 LP* 18 03 38.1855792929 -30 00 51.625818438     14.303   12.481 ~ 17 0
9 [B86] 104 RG* 18 03 39.6687351017 -30 00 52.017314473     15.318 14.88 13.553 M2 7 0
10 [B86] 106 RG* 18 03 40.5008379275 -30 03 28.123205283     15.484 14.92 13.696 M2 7 0
11 NGC 6528 GlC 18 04 49.61 -30 03 20.8   12.12 10.65     ~ 472 0
12 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 542 0
13 M 71 GlC 19 53 46.49 +18 46 45.1   7.91 6.1     ~ 1033 0
14 NAME Galactic Bulge reg ~ ~           ~ 3516 0

    Equat.    Gal    SGal    Ecl

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2021.01.19-16:54:52

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