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A Perspective on th...
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Sales-Silva, J. V.Observ Nacl MCTI, MCTI, R Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, Brazil.
(author)
A Perspective on the Milky Way Bulge Bar as Seen from the Neutron-capture Elements Cerium and Neodymium with APOGEE
- Article/chapterEnglish2024
Publisher, publication year, extent ...
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Institute of Physics Publishing (IOPP),2024
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electronicrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:mau-66862
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https://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-66862URI
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https://doi.org/10.3847/1538-4357/ad28c2DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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This study probes the chemical abundances of the neutron-capture elements cerium and neodymium in the inner Milky Way from an analysis of a sample of similar to 2000 stars in the Galactic bulge bar spatially contained within divided by X-Gal divided by < 5 kpc, divided by Y-Gal divided by < 3.5 kpc, and divided by Z(Gal)divided by < 1 kpc, and spanning metallicities between -2.0 less than or similar to [Fe/H] less than or similar to +0.5. We classify the sample stars into low- or high-[Mg/Fe] populations and find that, in general, values of [Ce/Fe] and [Nd/Fe] increase as the metallicity decreases for the low- and high-[Mg/Fe] populations. Ce abundances show a more complex variation across the metallicity range of our bulge-bar sample when compared to Nd, with the r-process dominating the production of neutron-capture elements in the high-[Mg/Fe] population ([Ce/Nd] < 0.0). We find a spatial chemical dependence of Ce and Nd abundances for our sample of bulge-bar stars, with low- and high-[Mg/Fe] populations displaying a distinct abundance distribution. In the region close to the center of the MW, the low-[Mg/Fe] population is dominated by stars with low [Ce/Fe], [Ce/Mg], [Nd/Mg], [Nd/Fe], and [Ce/Nd] ratios. The low [Ce/Nd] ratio indicates a significant contribution in this central region from r-process yields for the low-[Mg/Fe] population. The chemical pattern of the most metal-poor stars in our sample suggests an early chemical enrichment of the bulge dominated by yields from core-collapse supernovae and r-process astrophysical sites, such as magnetorotational supernovae.
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Cunha, K.Observ Nacl MCTI, MCTI, R Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, Brazil.;Univ Arizona, Steward Observ, Tucson, AZ 85719 USA.
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Smith, V. V.NOIRLab, Tucson, AZ 85719 USA.
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Daflon, S.Observ Nacl MCTI, MCTI, R Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, Brazil.
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Souto, D.Univ Fed Sergipe, Dept Fis, Ave Marechal Rondon S-N, BR-49000000 Sao Cristovao, SE, Brazil.
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Guerco, R.Observ Nacl MCTI, MCTI, R Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, Brazil.
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Queiroz, A.Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, Spain.
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Chiappini, C.Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14482 Potsdam, Germany.
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Hayes, C. R.NRC Herzberg Astron & Astrophys Res Ctr, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada.
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Masseron, T.Inst Astrofis Canarias IAC, E-38205 San Cristobal la Laguna, Tenerife, Spain.;Univ La Laguna ULL, Dept Astrofis, San Cristobal la Laguna 38206, Tenerife, Spain.
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Hasselquist, StenSpace Telescope Sci Inst, Baltimore, MD USA.
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Horta, D.Flatiron Inst, New York, NY 10010 USA.
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Prantzos, N.Inst Astrophys Paris, UMR 7095, CNRS, 98 Bis Blvd Arago, F-75014 Paris, France.;Sorbonne Univ, 98 Bis Blvd Arago, F-75014 Paris, France.
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Zoccali, M.Pontificia Univ Catolica Chile, Inst Astrofis, Vicuna Mackenna 4860,Macul,Casilla 306, Santiago 22, Chile.;Millenium Inst Astrophys MAS, Nuncio Monsenor Sotero Sanz 100, Santiago, Chile.
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Allende Prieto, C.Inst Astrofis Canarias IAC, E-38205 San Cristobal la Laguna, Tenerife, Spain.;Univ La Laguna ULL, Dept Astrofis, San Cristobal la Laguna 38206, Tenerife, Spain.
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Barbuy, B.Univ Sao Paulo, IAG, Rua Matao 1226, Cidade Universitaria, BR-05508090 Sao Paulo, Brazil.
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Beaton, R.Space Telescope Sci Inst, Baltimore, MD USA.
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Bizyaev, D.New Mex State Univ, Apache Point Observ, POB 59, Sunspot, NM 88349 USA.;Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow, Russia.
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Fernandez-Trincado, J. G.Univ Catolica Norte, Inst Astron, Ave Angamos 0610, Antofagasta, Chile.
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Frinchaboy, P. M.Texas Christian Univ, Dept Phys & Astron, TCU Box 298840, Ft Worth, TX 76129 USA.
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Holtzman, J. A.New Mexico State Univ, Las Cruces, NM 88003 USA.
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Johnson, J. A.Ohio State Univ, Ctr Cosmol & Astro Particle Phys, Dept Astron, Columbus, OH 43210 USA.
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Jönsson, HenrikMalmö universitet,Institutionen för materialvetenskap och tillämpad matematik (MTM)(Swepub:mau)ak0675
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Majewski, S. R.Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA.
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Minniti, D.Univ Fed Santa Catarina, Dept Fis, BR-88040900 Florianopolis, Brazil.;Univ Andres Bello, Fac Ciencias Exactas, Inst Astrofis, Ave Fernandez Concha 700, Santiago, Chile.;Vatican Observ, Vatican City I-V00120, Vatican.
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Nidever, D. L.Montana State Univ, Dept Phys, POB 173840, Bozeman, MT 59717 USA.
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Schiavon, R. P.Liverpool John Moores Univ, Astrophys Res Inst, Liverpool L3, England.
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Schultheis, M.Univ Cote Azur, Observ Cote Azur, CNRS, Lab Lagrange, Bd Observ,CS 34229, F-06304 Nice 4, France.
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Sobeck, J.Univ Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA.
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Stringfellow, G. S.Univ Colorado, Ctr Astrophys & Space Astron, 389 UCB, Boulder, CO 80309 USA.
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Zasowski, G.Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84105 USA.
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Observ Nacl MCTI, MCTI, R Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, Brazil.Observ Nacl MCTI, MCTI, R Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, Brazil.;Univ Arizona, Steward Observ, Tucson, AZ 85719 USA.
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In:Astrophysical Journal: Institute of Physics Publishing (IOPP)965:20004-637X1538-4357
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Sales-Silva, J. ...
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Cunha, K.
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Smith, V. V.
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Daflon, S.
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Souto, D.
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Guerco, R.
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Queiroz, A.
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Chiappini, C.
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Hayes, C. R.
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Masseron, T.
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Hasselquist, Ste ...
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Horta, D.
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Prantzos, N.
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Zoccali, M.
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Allende Prieto, ...
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Barbuy, B.
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Beaton, R.
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Bizyaev, D.
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Fernandez-Trinca ...
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Frinchaboy, P. M ...
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Holtzman, J. A.
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Johnson, J. A.
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Jönsson, Henrik
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Majewski, S. R.
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Minniti, D.
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Nidever, D. L.
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Schiavon, R. P.
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Schultheis, M.
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Sobeck, J.
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Stringfellow, G. ...
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Zasowski, G.
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Malmö University