J/AJ/161/128 Chemical composition of 15 red giant stars with HPF (Sneden+, 2021)
Chemical compositions of red giant stars from Habitable Zone Planet Finder
spectroscopy.
Sneden C., Afsar M., Bozkurt Z., Topcu G.B., Ozdemir S., Zeimann G.R.,
Froning C.S., Mahadevan S., Ninan J.P., Bender C.F., Terrien R.,
Ramsey L.W., Lind K., Mace G.N., Kaplan K.F., Kim H., Hawkins K.,
Bowler B.P.
<Astron. J., 161, 128 (2021)>
=2021AJ....161..128S 2021AJ....161..128S
ADC_Keywords: Stars, giant; Spectra, infrared; Abundances;
Keywords: Chemical abundances ; Metallicity ; Near infrared astronomy ;
Atomic spectroscopy ; Horizontal branch
Abstract:
We have used the Habitable Zone Planet Finder (HPF) to gather
high-resolution, high signal-to-noise near-infrared spectra of 13
field red horizontal branch (RHB) stars, one open cluster giant, and
one very metal-poor halo red giant. The HPF spectra cover the
0.81-1.28µm wavelength range of the zyJ bands, partially filling
the gap between the optical (0.4-1.0µm) and infrared (1.5-2.4µm)
spectra already available for the program stars. We derive abundances
of 17 species from LTE-based computations involving equivalent widths
and spectrum syntheses, and estimate abundance corrections for the
species that are most affected by departures from LTE in RHB stars.
Generally good agreement is found between HPF-based metallicities and
abundance ratios and those from the optical and infrared spectral
regions. Light element transitions dominate the HPF spectra of these
red giants, and HPF data can be used to derive abundances from species
with poor or no representation in optical spectra (e.g., C i, P i, S
i, K i). Attention is drawn to the HPF abundances in two field
solar-metallicity RHB stars of special interest: one with an extreme
carbon isotope ratio, and one with a rare, very large lithium content.
The latter star is unique in our sample in exhibiting very strong He i
10830Å absorption. The abundances of the open cluster giant concur
with those derived from other wavelength regions. Detections of CI and
SI in HD122563 are reported, yielding the lowest metallicity
determination of [S/Fe] from more than one multiplet.
Description:
The red giants investigated in this Habitable Planet Finder (HPF)
spectroscopic study have been selected from our previous studies. See
those papers for detailed descriptions of the optical observations of
our program stars.
HPF is a high-resolution (R∼55000) near-infrared (zyJ photometric
bands, 8100-12800Å) spectrograph on the 10m Hobby-Eberly
Telescope (HET) at McDonald Observatory.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 74 15 *Target stars
table4.dat 39 134 Atomic lines
table5.dat 97 134 *Line abundances
table9.dat 44 37 HD 122563 line abundances
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Note on table1.dat: All data are from SIMBAD database except Distance.
Note on table5.dat: All abundances in this table are in log epsilon,
log(NX/NH)+12, units.
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
V/55 : A catalogue of high-velocity stars (Roman, 1955)
J/MNRAS/340/304 : [X/Fe] of Galactic disc F and G dwarfs (Reddy+, 2003)
J/MNRAS/367/1329 : Elemental abundances for 176 stars (Reddy+, 2006)
J/A+A/562/A71 : Chemical abund. of solar neighbourhood dwarfs (Bensby+,2014)
J/ApJS/210/23 : Line intensities in CN transitions (Brooke+, 2014)
J/ApJS/215/23 : FeI radiative lifetime & branching fract. (Den Hartog+,2014)
J/MNRAS/441/3127 : FeI oscillator strengths for Gaia-ESO (Ruffoni+, 2014)
J/ApJS/214/26 : Line lists for CN isotopes transitions (Sneden+, 2014)
J/MNRAS/446/3562 : Abundances of red giants in NGC752 (Bocek Topcu+, 2015)
J/ApJS/220/13 : Co I transition probabilities (Lawler+, 2015)
J/ApJ/819/103 : Abundances of two very metal-poor stars (Afsar+, 2016)
J/MNRAS/463/580 : Abundances of red giants in NGC6940 (Bocek+, 2016)
J/A+A/587/A42 : weak G-band stars abundances (Palacios+, 2016)
J/ApJS/229/30 : Revised stellar prop. of Q1-17 Kepler targets (Mathur+,2017)
J/A+A/613/A47 : Radial velocities of 12 evolved stars (Adamow+, 2018)
J/AJ/155/240 : A spectroscopic survey of field RHB stars (Afsar+, 2018)
J/ApJ/865/44 : Abundances of evolved stars from IGRINS. I. (Afsar+, 2018)
J/A+A/609/A116 : Low extinction TGAS HR Catalogue (Ruiz-Dern+, 2018)
J/A+A/634/A136 : Chemical S abundances of 719 FGK stars (Costa Silva+,2020)
http://physics.nist.gov/asd : NIST Atomic DATAbase
http://kurucz.harvard.edu/linelists.html : Kurucz compendium
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 A16 --- Name Star identification
18- 19 I2 h RAh [0/23] Hour of right ascension (J2000)
21- 22 I2 min RAm Minute of right ascension (J2000)
24- 28 F5.2 s RAs Second of right ascension (J2000)
30 A1 --- DE- [±] Sign of declination (J2000)
32- 33 I2 deg DEd Degree of declination (J2000)
35- 36 I2 arcmin DEm Arcminute of declination (J2000)
38- 41 F4.1 arcsec DEs Arcsecond of declination (J2000)
43- 47 F5.2 mag Bmag [5.71/11.9] B-band magnitude
49- 53 F5.2 mag Vmag [4.89/10.66] V-band magnitude
55- 58 F4.2 mag Kmag [2.97/7.82] K-band magnitude
60- 63 I4 pc Dist [122/1021] Distance, from Gaia DR2
65- 68 I4 yr Obs.Y [2018/2019] Year of observation
70- 71 I2 "month" Obs.M Month of observation
73- 74 I2 d Obs.D Day of observation
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.3 0.1nm lambda [8098/12680] wavelength in air; Angstroms
11- 15 A5 --- Species atomic designation
17- 21 F5.3 eV chi [1.04/8.65] lower level excitation energy
23- 27 F5.2 [-] log(gf) [-2.32/0.69] logarithm of the gf-value (transition
probability)
29- 39 A11 --- Ref Literature source of the gf-value (1)
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Note (1): References as follows
NISTX+ = the NIST Atomic Spectra Database, http://physics.nist.gov/asd,
with notation of their assessment of log(gf) quality, e.g., B+;
LAWLER13 = Lawler+, 2013ApJS..205...11L 2013ApJS..205...11L
KURUCZ = the Kurucz (2011CaJPh..89..417K 2011CaJPh..89..417K, 2018ASPC..515...47K 2018ASPC..515...47K) compendium,
http://kurucz.harvard.edu/linelists.html
DENHARTOG14 = Den Hartog+, 2014, J/ApJS/215/23
RUFFONI14 = Ruffoni+, 2014, J/MNRAS/441/3127
OBRIAN91 = O'Brian+, 1991JOSAB...8.1185O 1991JOSAB...8.1185O
LAWLER15 = Lawler+, 2015, J/ApJS/220/13
RYDE19 = Ryde+, 2019A&A...631L...3R 2019A&A...631L...3R
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.2 0.1nm lambda [8098/12680] wavelength in air; Angstroms
10- 14 A5 --- Species atomic designation
16- 20 F5.3 eV chi [1.04/8.65] lower level excitation energy
22- 27 F6.3 [-] log(gf) [-2.32/0.69] logarithm of the gf-value
(transition probability)
29- 32 F4.2 --- Star1 [3.18/8.29]? line abundances for HIP 000476
34- 37 F4.2 --- Star2 [3.18/8.11]? line abundances for HIP 019740
39- 42 F4.2 --- Star3 [3.05/8.36]? line abundances for HIP 027091
44- 47 F4.2 --- Star4 [2.75/8.33]? line abundances for HIP 028417
49- 52 F4.2 --- Star5 [2.95/8.16]? line abundances for HIP 029962
54- 57 F4.2 --- Star6 [2.73/8.02]? line abundances for HIP 032431
59- 62 F4.2 --- Star7 [2.85/7.7]? line abundances for HIP 033578
64- 67 F4.2 --- Star8 [3.07/8.65]? line abundances for HIP 057748
69- 72 F4.2 --- Star9 [3.08/8.24]? line abundances for HIP 099789
74- 77 F4.2 --- Star10 [3.06/8.27]? line abundances for HIP 106775
79- 82 F4.2 --- Star11 [3.19/8.3]? line abundances for HIP 113610
84- 87 F4.2 --- Star12 [2.97/8.24]? line abundances for HIP 114809
89- 92 F4.2 --- Star13 [3.17/8.29]? line abundances for HIP 116053
94- 97 F4.2 --- Star14 [3.12/8.4]? line abundances for NGC 6940 MMU 105
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Byte-by-byte Description of file: table9.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.3 0.1nm lambda [8220/11992] wavelength in air; Angstroms
11- 15 A5 --- Species atomic designation
17- 21 F5.3 eV chi [0.82/7.49] lower level excitation energy
23- 27 F5.2 [-] loggf [-2.2/0.42] logarithm of the gf-value (transition
probability)
29- 32 F4.2 --- loge [0.29/5.53] logarithm of the abundance
34- 44 A11 --- Ref Literature source of the gf-value (1)
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Note (1): References as follows
NISTX+ = the NIST Atomic Spectra Database, http://physics.nist.gov/asd,
with notation of their assessment of log(gf) quality, e.g., B+;
LAWLER13 = Lawler+, 2013ApJS..205...11L 2013ApJS..205...11L
KURUCZ = the Kurucz (2011CaJPh..89..417K 2011CaJPh..89..417K, 2018ASPC..515...47K 2018ASPC..515...47K) compendium,
http://kurucz.harvard.edu/linelists.html
DENHARTOG14 = Den Hartog+, 2014, J/ApJS/215/23
RUFFONI14 = Ruffoni+, 2014, J/MNRAS/441/3127
OBRIAN91 = O'Brian+, 1991JOSAB...8.1185O 1991JOSAB...8.1185O
LAWLER15 = Lawler+, 2015, J/ApJS/220/13
RYDE19 = Ryde+, 2019A&A...631L...3R 2019A&A...631L...3R
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History:
From electronic version of the journal
References:
Afsar et al. 2016ApJ...819..103A 2016ApJ...819..103A cat. J/ApJ/819/103
Bocek et al. 2016MNRAS.463..580B 2016MNRAS.463..580B cat. J/MNRAS/463/580
Afsar et al. 2018AJ....155..240A 2018AJ....155..240A cat. J/AJ/155/240
Afsar et al. 2018ApJ...865...44A 2018ApJ...865...44A cat. J/ApJ/865/44
Bocek et al. 2019MNRAS.485.4625B 2019MNRAS.485.4625B
(End) Prepared by [AAS], Coralie Fix [CDS], 10-May-2021