J/AJ/166/128 IRMP stars and type Ia supernovae. I. Connection (Reggiani+, 2023)
Iron-rich Metal-poor Stars and the Astrophysics of Thermonuclear Events
Observationally Classified as Type Ia Supernovae.
I. Establishing the Connection.
Reggiani H., Schlaufman K.C., Casey A.R.
<Astron. J., 166, 128 (2023)>
=2023AJ....166..128R 2023AJ....166..128R
ADC_Keywords: Stars, metal-deficient; Stars, peculiar; Novae; Optical;
Abundances, [Fe/H]
Keywords: Chemically peculiar stars ; Explosive nucleosynthesis ; Dwarf
spheroidal galaxies ; Globular star clusters ; Magellanic
Clouds ; Milky Way stellar halo ; Big Bang nucleosynthesis ;
Nucleosynthesis ; Stellar nucleosynthesis ; Population II stars
; Stellar abundances ; Type Ia supernovae
Abstract:
The progenitor systems and explosion mechanisms responsible for the
thermonuclear events observationally classified as Type Ia supernovae
are uncertain and difficult to uniquely constrain using traditional
observations of Type Ia supernova host galaxies, progenitors, light
curves, and remnants. For the subset of thermonuclear events that are
prolific producers of iron, we use published theoretical
nucleosynthetic yields to identify a set of elemental abundance ratios
infrequently observed in metal-poor stars but shared across a range of
progenitor systems and explosion mechanisms: [Na,Mg,Co/Fe]<0. We label
stars with this abundance signature "iron-rich metal-poor," or IRMP
stars. We suggest that IRMP stars formed in environments dominated by
thermonuclear nucleosynthesis and consequently that their elemental
abundances can be used to constrain both the progenitor systems and
explosion mechanisms responsible for thermonuclear explosions. We
identify three IRMP stars in the literature and homogeneously infer
their elemental abundances. We find that the elemental abundances of
BD+80-245, HE0533-5340, and SMSSJ034249.53-284216.0 are best explained
by the (double) detonations of sub-Chandrasekhar-mass CO white dwarfs.
If our interpretation of IRMP stars is accurate, then they should be
very rare in globular clusters and more common in the Magellanic
Clouds and dwarf spheroidal galaxies than in the Milky Way's halo. We
propose that future studies of IRMP stars will quantify the relative
occurrences of different thermonuclear event progenitor systems and
explosion mechanisms.
Description:
We use atomic absorption-line data from Ji+, 2020, J/ApJ/889/27 based
on the linemake code (Sneden+, 2009, 2009ApJS..182...80S 2009ApJS..182...80S,
2016IAUFM..29A.287S 2016IAUFM..29A.287S and Placco+, 2021RNAAS...5...92P 2021RNAAS...5...92P).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 94 3 Observations log
table3.dat 65 816 Atomic Data, equivalent-width and individual-line
abundance inferences
--------------------------------------------------------------------------------
See also:
B/simbad : Simbad objects catalogue (M.Wenger 2000)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
II/335 : Revised catalog GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/AJ/120/1841 : Abundances & Kinematics of Halo & Disk Stars (Fulbright 2000)
J/A+A/416/1117 : Abundances in the early Galaxy (Cayrel+, 2004)
J/ApJS/182/80 : Rare earth abundances (Sneden+, 2009)
J/A+A/523/A17 : Individual stars in Fornax dSph center (Letarte+, 2010)
J/A+A/511/L10 : Abundances and space velocities of 94 stars (Nissen+, 2010)
J/ApJ/743/156 : NEOWISE obs of NEOs; preliminary results (Mainzer+, 2011)
J/MNRAS/412/843 : SAGA extremely metal-poor stars (Suda+, 2011)
J/ApJ/778/56 : Hamburg/ESO Survey extremely metal-poor stars (Cohen+, 2013)
J/ApJ/769/57 : Equivalent widths of metal-poor stars (Frebel+, 2013)
J/AJ/145/107 : Zr, Ba, La, & Eu abund in 19 open clusters (Jacobson+, 2013)
J/ApJ/767/134 : Abundances of red giant stars in UFD galaxies (Vargas+, 2013)
J/A+A/564/A125 : AGN Torus model comparison of AGN in CDFS (Buchner+, 2014)
J/AJ/147/136 : Stars of very low metal abundance VI. Abund (Roederer+, 2014)
J/ApJ/789/147 : Star formation histories of LG dwarf galaxies (Weisz+, 2014)
J/ApJ/807/171 : SkyMapper Survey metal-poor star spectro (Jacobson+, 2015)
J/ApJ/833/225 : -2.6≤[Fe/H]≤0.2 F & G dwarfs. II. Abundances (Zhao+, 2016)
J/A+A/608/A46 : Constraining cosmic scatter (Reggiani+, 2017)
J/A+A/626/A15 : Sculptor Red Giant Branch stars abundances (Hill+, 2019)
J/A+A/631/A171 : Neutron-capture elements dwarf galaxies (Skuladottir+, 2019)
J/ApJ/891/85 : Manganese abundances GC & dSph galaxies (de los Reyes+, 2020)
J/ApJ/889/27 : Abundances of 11 stars in Carina II and III (Ji+, 2020)
J/AJ/160/173 : Abundances metal-poor stars in Inner Bulge (Reggiani+, 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/AJ/163/252 : Abundances for 15 extreme-velocity stars (Reggiani+, 2022)
J/AJ/163/159 : Species abundances in WASP-77A (Reggiani+, 2022)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 24 A24 --- ID Stellar identifier
26- 27 I2 h RAh [3/8] Hour of right ascension (J2000)
29- 30 I2 min RAm Minute of right ascension (J2000)
32- 36 F5.2 s RAs Second of right ascension (J2000)
38 A1 --- DE- [±] Sign of declination (J2000)
40- 41 I2 deg DEd Degree of declination (J2000)
43- 44 I2 arcmin DEm Arcminute of declination (J2000)
46- 50 F5.2 arcsec DEs Arcsecond of declination (J2000)
52- 55 I4 yr Obs.Y [2003/2013] UT year of observation
57- 59 A3 "month" Obs.M UT month of observation
61- 62 I2 d Obs.D UT day of observation
64- 82 A19 --- Inst Telescope/Instrument used
84- 87 I4 s Texp [2000/9800] Exposure time
89- 90 I2 --- S/N4500 [45/70] Signal-to-noise ratio at 4500Å
92- 94 I3 --- S/N6500 [100/115] Signal-to-nois-ratio at 6500Å
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 24 A24 --- ID Stellar identifier
26- 33 F8.3 0.1nm Wave [3729/7789] Wavelength; Angstroms
35- 38 A4 --- Species Species identifier
40- 44 F5.3 eV ExPot [0/4.35] Excitation potential
46- 51 F6.3 [-] loggf [-5.63/0.54] log oscillator strength
53- 58 F6.2 10-13m EW [3.95/161] Equivalent width; milli-Angstroms
60- 65 F6.3 [-] logE(X) [-1.27/6.03] log number abundance of Species
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 26-Mar-2024