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

J. G. Fernández-Trincado, O. Zamora, Diogo Souto, R. E. Cohen, F. Dell'Agli, D. A. García-Hernández, T. Masseron, R. P. Schiavon, Sz Mészáros, K. Cunha, S. Hasselquist, M. Shetrone, J. Schiappacasse Ulloa, B. Tang, D. Geisler, D. R.G. Schleicher, S. Villanova, R. E. Mennickent, D. Minniti, J. Alonso-GarcíaA. Manchado, T. C. Beers, J. Sobeck, G. Zasowski, M. Schultheis, S. R. Majewski, A. Rojas-Arriagada, A. Almeida, F. Santana, R. J. Oelkers, P. Longa-Peña, R. Carrera, A. J. Burgasser, R. R. Lane, A. Roman-Lopes, I. I. Ivans, F. R. Hearty

Resultado de la investigación: Article

3 Citas (Scopus)

Resumen

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.

Idioma originalEnglish
Número de artículoA178
PublicaciónAstronomy and Astrophysics
Volumen627
DOI
EstadoPublished - 1 jul 2019

Huella dactilar

galactic bulge
galactic evolution
globular clusters
observatories
observatory
stars
experiment
giant stars
asymptotic giant branch stars
massive stars
spectrographs
metallicity
depletion
signatures
gas
high resolution
gases

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Fernández-Trincado, J. G., Zamora, O., Souto, D., Cohen, R. E., Dell'Agli, F., García-Hernández, D. A., ... Hearty, F. R. (2019). H-band discovery of additional second-generation stars in the Galactic bulge globular cluster NGC 6522 as observed by APOGEE and Gaia. Astronomy and Astrophysics, 627, [A178]. https://doi.org/10.1051/0004-6361/201834391
Fernández-Trincado, J. G. ; Zamora, O. ; Souto, Diogo ; Cohen, R. E. ; Dell'Agli, F. ; García-Hernández, D. A. ; Masseron, T. ; Schiavon, R. P. ; Mészáros, Sz ; 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-García, 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-Peña, P. ; Carrera, R. ; Burgasser, A. J. ; Lane, R. R. ; Roman-Lopes, A. ; Ivans, I. I. ; Hearty, F. R. / H-band discovery of additional second-generation stars in the Galactic bulge globular cluster NGC 6522 as observed by APOGEE and Gaia. En: Astronomy and Astrophysics. 2019 ; Vol. 627.
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title = "H-band discovery of additional second-generation stars in the Galactic bulge globular cluster NGC 6522 as observed by APOGEE and Gaia",
abstract = "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.",
keywords = "Galaxy: formation, Galaxy: structure, Globular clusters: individual: NGC 6522, Stars: abundances, Stars: Population II",
author = "Fern{\'a}ndez-Trincado, {J. G.} and O. Zamora and Diogo Souto and Cohen, {R. E.} and F. Dell'Agli and Garc{\'i}a-Hern{\'a}ndez, {D. A.} and T. Masseron and Schiavon, {R. P.} and Sz M{\'e}sz{\'a}ros and K. Cunha and S. Hasselquist and M. Shetrone and {Schiappacasse Ulloa}, J. and B. Tang and D. Geisler and Schleicher, {D. R.G.} and S. Villanova and Mennickent, {R. E.} and D. Minniti and J. Alonso-Garc{\'i}a and A. Manchado and Beers, {T. C.} and J. Sobeck and G. Zasowski and M. Schultheis and Majewski, {S. R.} and A. Rojas-Arriagada and A. Almeida and F. Santana and Oelkers, {R. J.} and P. Longa-Pe{\~n}a and R. Carrera and Burgasser, {A. J.} and Lane, {R. R.} and A. Roman-Lopes and Ivans, {I. I.} and Hearty, {F. R.}",
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Fernández-Trincado, JG, Zamora, O, Souto, D, Cohen, RE, Dell'Agli, F, García-Hernández, DA, Masseron, T, Schiavon, RP, Mészáros, S, Cunha, K, Hasselquist, S, Shetrone, M, Schiappacasse Ulloa, J, Tang, B, Geisler, D, Schleicher, DRG, Villanova, S, Mennickent, RE, Minniti, D, Alonso-García, J, Manchado, A, Beers, TC, Sobeck, J, Zasowski, G, Schultheis, M, Majewski, SR, Rojas-Arriagada, A, Almeida, A, Santana, F, Oelkers, RJ, Longa-Peña, P, Carrera, R, Burgasser, AJ, Lane, RR, Roman-Lopes, A, Ivans, II & Hearty, FR 2019, 'H-band discovery of additional second-generation stars in the Galactic bulge globular cluster NGC 6522 as observed by APOGEE and Gaia', Astronomy and Astrophysics, vol. 627, A178. https://doi.org/10.1051/0004-6361/201834391

H-band discovery of additional second-generation stars in the Galactic bulge globular cluster NGC 6522 as observed by APOGEE and Gaia. / Fernández-Trincado, J. G.; Zamora, O.; Souto, Diogo; Cohen, R. E.; Dell'Agli, F.; García-Hernández, D. A.; Masseron, T.; Schiavon, R. P.; Mészáros, Sz; 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-García, 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-Peña, P.; Carrera, R.; Burgasser, A. J.; Lane, R. R.; Roman-Lopes, A.; Ivans, I. I.; Hearty, F. R.

En: Astronomy and Astrophysics, Vol. 627, A178, 01.07.2019.

Resultado de la investigación: Article

TY - JOUR

T1 - H-band discovery of additional second-generation stars in the Galactic bulge globular cluster NGC 6522 as observed by APOGEE and Gaia

AU - Fernández-Trincado, J. G.

AU - Zamora, O.

AU - Souto, Diogo

AU - Cohen, R. E.

AU - Dell'Agli, F.

AU - García-Hernández, D. A.

AU - Masseron, T.

AU - Schiavon, R. P.

AU - Mészáros, Sz

AU - Cunha, K.

AU - Hasselquist, S.

AU - Shetrone, M.

AU - Schiappacasse Ulloa, J.

AU - Tang, B.

AU - Geisler, D.

AU - Schleicher, D. R.G.

AU - Villanova, S.

AU - Mennickent, R. E.

AU - Minniti, D.

AU - Alonso-García, J.

AU - Manchado, A.

AU - Beers, T. C.

AU - Sobeck, J.

AU - Zasowski, G.

AU - Schultheis, M.

AU - Majewski, S. R.

AU - Rojas-Arriagada, A.

AU - Almeida, A.

AU - Santana, F.

AU - Oelkers, R. J.

AU - Longa-Peña, P.

AU - Carrera, R.

AU - Burgasser, A. J.

AU - Lane, R. R.

AU - Roman-Lopes, A.

AU - Ivans, I. I.

AU - Hearty, F. R.

PY - 2019/7/1

Y1 - 2019/7/1

N2 - 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.

AB - 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.

KW - Galaxy: formation

KW - Galaxy: structure

KW - Globular clusters: individual: NGC 6522

KW - Stars: abundances

KW - Stars: Population II

UR - http://www.scopus.com/inward/record.url?scp=85070098334&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201834391

DO - 10.1051/0004-6361/201834391

M3 - Article

AN - SCOPUS:85070098334

VL - 627

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

M1 - A178

ER -