J/A+A/641/A44 Dwarfs, giants and supergiants Equivalent widths (Morelli+, 2020)
The Infrared Telescope Facility (IRTF) spectral library.
II. New indices in Y, J, H, and L atmospheric windows.
Morelli L., Ivanov V.D., Pizzella A., Gasparri D., Coccato L.,
Corsini E.M., Dalla Bonta E., Francois P., Cesetti M.
<Astron. Astrophys. 641, A44 (2020)>
=2020A&A...641A..44M 2020A&A...641A..44M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, late-type ; Infrared sources ; Equivalent widths
Keywords: infrared: stars - line: identification - stars: abundances -
supergiants - stars: late-type - stars: fundamental parameters
Abstract:
Stellar population studies in the infrared (IR) wavelength range have
two main advantages with respect to the optical regime: they probe
different populations, because most of the light in the IR comes from
redder and generally older stars and allow us to see through dust
because the IR light is less affected by extinction. Our project
investigates the sensitivity of various spectral features in the
1-5um wavelength range to the physical properties of stars (Teff,
[Fe/H], logg) and aims to objectively define spectral indices that can
characterize age and metallicity of unresolved stellar populations. We
implemented a method that uses derivatives of the indices as functions
of Teff, [Fe/H] of log g across the entire available wavelength range
to reveal the most sensitive indices to these parameters and the
ranges in which these indices work. Here, we complement the previous
work in the I and K bands reporting a new system for Y, J, H and L
atmospheric windows. We list the equivalent widths of these indices
for the Infrared Telescope Facility (IRTF) spectral library stars.
Description:
The IRTF spectral library (Cushing et al., 2005ApJ...623.1115C 2005ApJ...623.1115C; Rayner
et al., 2009ApJS..185..289R 2009ApJS..185..289R) contains flux calibrated spectra of about
200 objects, with a typical uncertainty of about 5%.
We present here an analysis of stellar spectra in the Y, J, H, and L
atmospheric windows, based on high-quality medium resolution
(R∼2000-2500) spectra of 195 stars with almost solar metallicity
(-0.5≤[Fe/H]≤0.5dex) and a spectral S/N of about 100 (Rayner et al.,
2009ApJS..185..289R 2009ApJS..185..289R).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablee1.dat 124 195 equivalent width of the Y-band indices, Part A
tablee2.dat 80 195 Equivalent width of the Y-band indices, Part B
tablee3.dat 157 195 Equivalent width of the J-band indices
tablee4.dat 146 195 Equivalent width of the H-band indices, Part A
tablee5.dat 146 195 Equivalent width of the H-band indices, Part B
tablee6.dat 161 163 Equivalent width of the L-band indices
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See also:
J/A+A/549/A129 : Equivalent widths of cool stars (Cesetti+, 2013)
Byte-by-byte Description of file: tablee1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Type Type (G1)
13- 25 A13 --- Star Star name
27- 31 F5.2 0.1nm EWCSi CSi equivalent width
33- 36 F4.2 0.1nm e_EWCSi CSi equivalent width error
38- 43 F6.2 0.1nm EWPae Paε equivalent width
45- 48 F4.2 0.1nm e_EWPae Paε equivalent width error
50- 54 F5.2 0.1nm EWTi Ti equivalent width
56- 59 F4.2 0.1nm e_EWTi Ti equivalent width error
61- 65 F5.2 0.1nm EWTiOA TiOA equivalent width
67- 70 F4.2 0.1nm e_EWTiOA TiOA equivalent width error
72- 76 F5.2 0.1nm EWTiOB TiOB equivalent width
78- 81 F4.2 0.1nm e_EWTiOB TiOB equivalent width error
83- 87 F5.2 0.1nm EWFeH FeH equivalent width
89- 92 F4.2 0.1nm e_EWFeH FeH equivalent width error
94- 97 F4.2 0.1nm EWPAd Paδ equivalent width
99-102 F4.2 0.1nm e_EWPAd Paδ equivalent width error
104-108 F5.2 0.1nm EWFeTi FeTi equivalent width
110-113 F4.2 0.1nm e_EWFeTi FeTi equivalent width error
115-119 F5.2 0.1nm EWFe Fe equivalent width
121-124 F4.2 0.1nm e_EWFe Fe equivalent width error
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Byte-by-byte Description of file: tablee2.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Type Type (G1)
13- 25 A13 --- Star Star name
27- 31 F5.2 0.1nm EWVO VO equivalent width
33- 36 F4.2 0.1nm e_EWVO VO equivalent width error
38- 42 F5.2 0.1nm EWSi Si equivalent width
44- 47 F4.2 0.1nm e_EWSi Si equivalent width error
49- 53 F5.2 0.1nm EWCN CN equivalent width
55- 58 F4.2 0.1nm e_EWCN CN equivalent width error
60- 64 F5.2 0.1nm EWSr Sr equivalent width
66- 69 F4.2 0.1nm e_EWSr Sr equivalent width error
71- 75 F5.2 0.1nm EWPag Paγ equivalent width
77- 80 F4.2 0.1nm e_EWPag Paγ equivalent width error
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Byte-by-byte Description of file: tablee3.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Type Type (G1)
13- 25 A13 --- Star Star name
27- 31 F5.2 0.1nm EWNa Na equivalent width
33- 36 F4.2 0.1nm e_EWNa Na equivalent width error
38- 42 F5.2 0.1nm EWFeCr FeCr equivalent width
44- 47 F4.2 0.1nm e_EWFeCr FeCr equivalent width error
49- 53 F5.2 0.1nm EWFeK FeK equivalent width
55- 58 F4.2 0.1nm e_EWFeK FeK equivalent width error
60- 64 F5.2 0.1nm EWC C equivalent width
66- 69 F4.2 0.1nm e_EWC C equivalent width error
71- 75 F5.2 0.1nm EWK K equivalent width
77- 80 F4.2 0.1nm e_EWK K equivalent width error
82- 86 F5.2 0.1nm EWMg Mg equivalent width
88- 91 F4.2 0.1nm e_EWMg Mg equivalent width error
93- 97 F5.2 0.1nm EWSi Si equivalent width
99-102 F4.2 0.1nm e_EWSi Si equivalent width error
104-108 F5.2 0.1nm EWSiMg SiMg equivalent width
110-113 F4.2 0.1nm e_EWSiMg SiMg equivalent width error
115-119 F5.2 0.1nm EWKMg KMg equivalent width
121-124 F4.2 0.1nm e_EWKMg KMg equivalent width error
126-130 F5.2 0.1nm EWCrK CrK equivalent width
132-135 F4.2 0.1nm e_EWCrK CrK equivalent width error
137-141 F5.2 0.1nm EWPab Pab equivalent width
143-146 F4.2 0.1nm e_EWPab Pab equivalent width error
148-152 F5.2 0.1nm EWAl Al equivalent width
154-157 F4.2 0.1nm e_EWAl Al equivalent width error
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Byte-by-byte Description of file: tablee4.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Type Type (G1)
13- 25 A13 --- Star Star name
27- 31 F5.2 0.1nm EWMg1 Mg1 equivalent width
33- 36 F4.2 0.1nm e_EWMg1 Mg1 equivalent width error
38- 42 F5.2 0.1nm EWMg2 Mg2 equivalent width
44- 47 F4.2 0.1nm e_EWMg2 Mg2 equivalent width error
49- 53 F5.2 0.1nm EWK1 K1 equivalent width
55- 58 F4.2 0.1nm e_EWK1 K1 equivalent width error
60- 64 F5.2 0.1nm EWFe1 Fe1 equivalent width
66- 69 F4.2 0.1nm e_EWFe1 Fe1 equivalent width error
71- 75 F5.2 0.1nm EWBr16 Br16 equivalent width
77- 80 F4.2 0.1nm e_EWBr16 Br16 equivalent width error
82- 86 F5.2 0.1nm EWCO1 CO1 equivalent width
88- 91 F4.2 0.1nm e_EWCO1 CO1 equivalent width error
93- 97 F5.2 0.1nm EWBr15 Br15 equivalent width
99-102 F4.2 0.1nm e_EWBr15 Br15 equivalent width error
104-108 F5.2 0.1nm EWMg3 Mg3 equivalent width
110-113 F4.2 0.1nm e_EWMg3 Mg3 equivalent width error
115-119 F5.2 0.1nm EWFeH1 FeH1 equivalent width
121-124 F4.2 0.1nm e_EWFeH1 FeH1 equivalent width error
126-130 F5.2 0.1nm EWHMg HMg equivalent width
132-135 F4.2 0.1nm e_EWHMg HMg equivalent width error
137-141 F5.2 0.1nm EWCO2Sts CO2S ts equivalent width
143-146 F4.2 0.1nm e_EWCO2Sts CO2S ts equivalent width error
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Byte-by-byte Description of file: tablee5.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Type Type (G1)
13- 25 A13 --- Star Star name
27- 31 F5.2 0.1nm EWFe2 Fe2 equivalent width
33- 36 F4.2 0.1nm e_EWFe2 Fe2 equivalent width error
38- 42 F5.2 0.1nm EWBr13 Br13 equivalent width
44- 47 F4.2 0.1nm e_EWBr13 Br13 equivalent width error
49- 53 F5.2 0.1nm EWCO3 CO3 equivalent width
55- 58 F4.2 0.1nm e_EWCO3 CO3 equivalent width error
60- 64 F5.2 0.1nm EWFeH2 FeH2 equivalent width
66- 69 F4.2 0.1nm e_EWFeH2 FeH2 equivalent width error
71- 75 F5.2 0.1nm EWCO4 CO4 equivalent width
77- 80 F4.2 0.1nm e_EWCO4 CO4 equivalent width error
82- 86 F5.2 0.1nm EWFe3 Fe3 equivalent width
88- 91 F4.2 0.1nm e_EWFe3 Fe3 equivalent width error
93- 97 F5.2 0.1nm EWCO5 CO5 equivalent width
99-102 F4.2 0.1nm e_EWCO5 CO5 equivalent width error
104-108 F5.2 0.1nm EWAl1 Al1 equivalent width
110-113 F4.2 0.1nm e_EWAl1 Al1 equivalent width error
115-119 F5.2 0.1nm EWBr11 Br11 equivalent width
121-124 F4.2 0.1nm e_EWBr11 Br11 equivalent width error
126-130 F5.2 0.1nm EWCOMg COMg equivalent width
132-135 F4.2 0.1nm e_EWCOMg COMg equivalent width error
137-141 F5.2 0.1nm EWBr10 Br10 equivalent width
143-146 F4.2 0.1nm e_EWBr10 Br10 equivalent width error
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Byte-by-byte Description of file: tablee6.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Type Type (G1)
13- 25 A13 --- Star Star name
27- 31 F5.2 0.1nm EWMg1 Mg1 equivalent width
33- 36 F4.2 0.1nm e_EWMg1 Mg1 equivalent width error
38- 42 F5.2 0.1nm EWMg2 Mg2 equivalent width
44- 47 F4.2 0.1nm e_EWMg2 Mg2 equivalent width error
49- 53 F5.2 0.1nm EWP16 P16 equivalent width
55- 58 F4.2 0.1nm e_EWP16 P16 equivalent width error
60- 64 F5.2 0.1nm EWP14 P14 equivalent width
66- 69 F4.2 0.1nm e_EWP14 P14 equivalent width error
71- 75 F5.2 0.1nm EWP17 P17 equivalent width
77- 80 F4.2 0.1nm e_EWP17 P17 equivalent width error
82- 86 F5.2 0.1nm EWP15 P15 equivalent width
88- 91 F4.2 0.1nm e_EWP15 P15 equivalent width error
93- 97 F5.2 0.1nm EWPfg Pfγ equivalent width
99-102 F4.2 0.1nm e_EWPfg Pfγ equivalent width error
104-108 F5.2 0.1nm EWMg3 Mg3 equivalent width
110-113 F4.2 0.1nm e_EWMg3 Mg3 equivalent width error
115-119 F5.2 0.1nm EWHu15 Hu15 equivalent width
121-124 F4.2 0.1nm e_EWHu15 Hu15 equivalent width error
126-131 F6.2 0.1nm EWSiO1 SiO1 equivalent width
133-137 F5.2 0.1nm e_EWSiO1 SiO1 equivalent width error
139-144 F6.2 0.1nm EWSiO2 SiO2 equivalent width
146-149 F4.2 0.1nm e_EWSiO2 SiO2 equivalent width error
151-155 F5.2 0.1nm EWSiO3 ?=- SiO3 equivalent width
157-161 F5.2 0.1nm e_EWSiO3 ? SiO3 equivalent width error
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Global notes:
Note (G1): Dwarfs, Giants or Supergiants
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Acknowledgements:
Lorenzo Morelli, lorenzo.morelli(at)uda.cl
References:
Rayner et al., cool stars 2009ApJS..185..289R 2009ApJS..185..289R
Cesetti et al., cool stars, Paper I 2013A&A...549A.129C 2013A&A...549A.129C, Cat. J/A+A/549/A129
(End) Patricia Vannier [CDS] 08-Jul-2020