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BACCHUS Analysis of Weak Lines in APOGEE Spectra (BAWLAS)

Hayes, Christian R. (author)
NRC Herzberg Astron & Astrophys Res Ctr, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada.
Masseron, Thomas (author)
Inst Astrofis Canaries, E-38205 Tenerife, Spain.;Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain.
Sobeck, Jennifer (author)
Univ Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA.
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Garcia-Hernandez, D. A. (author)
Inst Astrofis Canaries, E-38205 Tenerife, Spain.;Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain.
Allende Prieto, Carlos (author)
Inst Astrofis Canaries, E-38205 Tenerife, Spain.;Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain.
Beaton, Rachael L. (author)
Princeton Univ, Dept Astrophys Sci, 4 Ivy Lane, Princeton, NJ 08544 USA.;Observ Carnegie Inst Sci, 813 Santa Barbara St, Pasadena, CA 91101 USA.
Cunha, Katia (author)
Observ Nacl, 77 Rua Gen Jose Cristino, BR-20921400 Rio De Janeiro, Brazil.;Univ Arizona, Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA.
Hasselquist, Sten (author)
Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA.
Holtzman, Jon A. (author)
New Mexico State Univ, Las Cruces, NM 88003 USA.
Jönsson, Henrik (author)
Malmö universitet,Institutionen för materialvetenskap och tillämpad matematik (MTM)
Majewski, Steven R. (author)
Univ Virginia, Dept Astron, Charlottesville, VA 22903 USA.
Shetrone, Matthew (author)
Univ Calif Santa Cruz, Univ Calif Observ, Santa Cruz, CA 95064 USA.
Smith, Verne V. (author)
NSFs Natl Opt Infrared Astron Res Lab, 950 North Cherry Ave, Tucson, AZ 85719 USA.
Almeida, Andres (author)
Univ Virginia, Dept Astron, Charlottesville, VA 22903 USA.
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NRC Herzberg Astron & Astrophys Res Ctr, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada Inst Astrofis Canaries, E-38205 Tenerife, Spain.;Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain. (creator_code:org_t)
2022-09-15
2022
English.
In: Astrophysical Journal Supplement Series. - : Institute of Physics Publishing (IOPP). - 0067-0049 .- 1538-4365. ; 262:1
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https://doi.org/10.3...
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https://mau.diva-por... (primary) (Raw object)
https://urn.kb.se/re...
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  • Journal article (peer-reviewed)
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  • Elements with weak and blended spectral features in stellar spectra are challenging to measure and require specialized analysis methods to precisely measure their chemical abundances. In this work, we have created a catalog of approximately 120,000 giants with high signal-to-noise Apache Point Observatory Galactic Evolution Experiment (APOGEE) Data Release 17 (DR17) spectra, for which we explore weak and blended species to measure Na, P, S, V, Cu, Ce, and Nd abundances and C-12/C-13 isotopic ratios. We employ an updated version of the Brussels Automatic Code for Characterizing High-accuracy Spectra (BACCHUS) code to derive these abundances using the stellar parameters measured by APOGEE's DR17 Stellar Parameters and Chemical Abundances Pipeline, quality flagging to identify suspect spectral lines, and a prescription for upper limits. Combined, these allow us to provide our BACCHUS Analysis of Weak Lines in APOGEE Spectra catalog of precise chemical abundances for these weak and blended species, which agrees well with the literature and improves upon APOGEE abundances for these elements, some of which are unable to be measured with APOGEE's current, grid-based approach without computationally expensive expansions. This new catalog can be used alongside APOGEE and provides measurements for many scientific applications ranging from nuclear physics to Galactic chemical evolution and Milky Way population studies. To illustrate this we show some examples of uses for this catalog, such as showing that we observe stars with enhanced s-process abundances or that we can use the C-12/C-13 ratios to explore extra mixing along the red giant branch.

Subject headings

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

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