J/AJ/166/127 Iron-rich metal-poor stars analysis (Reeves+, 2023)
The Dependence of Iron-rich Metal-poor Star Occurrence on Galactic Environment
Supports an Origin in Thermonuclear Supernova Nucleosynthesis.
Reeves Z., Schlaufman K.C., Reggiani H.
<Astron. J., 166, 127 (2023)>
=2023AJ....166..127R 2023AJ....166..127R
ADC_Keywords: Abundances, [Fe/H]; Stars, peculiar; Optical
Keywords: Chemical enrichment ; Chemically peculiar stars ; Dwarf
spheroidal galaxies ; Galactic archaeology ; Globular star
clusters ; Large Magellanic Cloud ; Magellanic Clouds ; Milky
Way Galaxy ; Population II stars ; Small Magellanic Cloud ;
Stellar abundances ; Type Ia supernovae
Abstract:
It has been suggested that a class of chemically peculiar metal-poor
stars called iron-rich metal-poor (IRMP) stars formed from molecular
cores with metal contents dominated by thermonuclear supernova
nucleosynthesis. If this interpretation is accurate, then IRMP stars
should be more common in environments where thermonuclear supernovae
were important contributors to chemical evolution. Conversely, IRMP
stars should be less common in environments where thermonuclear
supernovae were not important contributors to chemical evolution. At
constant [Fe/H]≲-1, the Milky Way's satellite classical dwarf
spheroidal (dSph) galaxies and the Magellanic Clouds have lower
[α/Fe] than the Milky Way field and globular cluster
populations. This difference is thought to demonstrate the importance
of thermonuclear supernova nucleosynthesis for the chemical evolution
of the Milky Way's satellite classical dSph galaxies and the
Magellanic Clouds. We use data from the Sloan Digital Sky Survey
Apache Point Observatory Galactic Evolution Experiment and Gaia to
infer the occurrence of IRMP stars in the Milky Way's satellite
classical dSph galaxies ηdSph and the Magellanic Clouds ηMag,
as well as in the Milky Way field ηMWF and globular cluster
populations ηMWGC. In order of decreasing occurrence, we find
ηdSph=0.07-0.02+0.02, ηMag=0.037-0.006+0.007,
ηMWF=0.0013-0.0005+0.0006, and a 1σ upper limit
ηMWGC<0.00057. These occurrences support the inference that IRMP
stars formed in environments dominated by thermonuclear supernova
nucleosynthesis and that the time lag between the formation of the
first and second stellar generations in globular clusters was longer
than the thermonuclear supernova delay time.
Description:
To calculate the occurrence of IRMP stars in the Milky Way's satellite
classical dSph galaxies, the Magellanic Clouds, the Milky Way field
population, and the Milky Way's globular clusters, we use data derived
from spectra that were gathered during the third and fourth phases of
the Sloan Digital Sky Survey (SDSS) as part of its Apache Point
Observatory Galactic Evolution Experiment (APOGEE). These spectra were
collected with the APOGEE spectrographs on the New Mexico State
University 1m Telescope, the Sloan Foundation 2.5m Telescope, and the
2.5m Irenee du Pont Telescope.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 85 7171 Analysis Sample
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See also:
B/simbad : Simbad objects catalogue (M.Wenger 2000)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)
I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)
III/286 : APOGEE-2 DR17 final allStar catalog (Abdurro'uf+, 2022)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/A+A/439/129 : HERES II. Spectroscopic analysis (Barklem+, 2005)
J/A+A/480/379 : Abundances of 59 red giants in LMC (Pompeia+, 2008)
J/A+A/505/117 : Abund red giants in 15 globular clusters (Carretta+, 2009)
J/ApJ/705/328 : Abundance measurements in Sculptor dSph (Kirby+, 2009)
J/ApJS/191/352 : Abund in stars of Milky Way dwarf satellites (Kirby+, 2010)
J/A+A/560/A44 : Abund of LMC bar and disk stars (Van der Swaelmen+, 2013)
J/ApJS/221/24 : SDSS-III APOGEE H-band spectral line lists (Shetrone+, 2015)
J/AJ/151/144 : ASPCAP weights 15 APOGEE chemical elements (Garcia+, 2016)
J/A+A/616/A12 : Gaia DR2 sources in GC and dSph (Gaia Collaboration+, 2018)
J/ApJ/858/92 : RPA Southern Pilot Search of 107 Stars (Hansen+, 2018)
J/ApJ/852/49 : Properties of metal-poor stars in APOGEE DR13 (Hayes+, 2018)
J/ApJ/868/110 : R-Process Alliance 1release in Galactic halo (Sakari+, 2018)
J/ApJ/898/150 : High-res. MIKE obs. of metal-poor stars (Ezzeddine+, 2020)
J/A+A/649/A155 : Impact of core and shell masses on SNe Ia (Gronow+, 2021)
J/A+A/656/A94 : Z-dependent yields of double detonations (Gronow+, 2021)
J/AJ/162/229 : 13 Magellanic Clouds metal-poor stars (Reggiani+, 2021)
J/A+A/649/A3 : Gaia Early Data Release 3 photo passbands (Riello+, 2021)
J/MNRAS/505/5978 : Gaia EDR3 view Galactic globular clusters (Vasiliev+, 2021)
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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6- 23 A18 --- APOGEE APOGEE position-based identifier
25- 43 I19 --- GaiaDR3 Gaia DR3 identifier
45- 63 I19 --- GaiaDR2 Gaia DR2 identifier
65- 69 A5 --- IRMP Iron-rich metal-poor? True or False
71- 85 A15 --- Env Galactic Environment
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 25-Mar-2024