J/A+A/549/A129 Equivalent widths of cool stars (Cesetti+, 2013)
The Infrared Telescope Facility (IRTF) spectral library:
Spectral diagnostics for cool stars.
Cesetti M., Pizzella A., Ivanov V.D., Morelli L., Corsini E.M.,
Dalla Bonta E.
<Astron. Astrophys., 549, A129 (2013)>
=2013A&A...549A.129C 2013A&A...549A.129C
ADC_Keywords: Stars, late-type ; Infrared sources ; Equivalent widths
Keywords: infrared: stars - line: identification - stars: abundances -
supergiants - stars: late-type - stars: fundamental parameters
Abstract:
The near-infrared (NIR) wavelength range offers some unique spectral
features, and it is less prone to the extinction than the optical one.
Recently, the first flux calibrated NIR library of cool stars from the
NASA Infrared Telescope Facility (IRTF) have become available, and it
has not been fully exploited yet.
We want to develop spectroscopic diagnostics for stellar physical
parameters based on features in the wavelength range 1-5um. In
this work we test the technique in the I and K bands. The study of the
Y, J, H, and L bands will be presented in the following paper.
An objective method for semi-empirical definition of spectral features
sensitive to various physical parameters is applied to the spectra. It
is based on sensitivity map - i.e., derivative of the flux in the
spectra with respect to the stellar parameters at a fixed wavelength.
New optimized indices are defined and their equivalent widths (EWs)
are measured.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 85 225 Physical parameters of the stars of the NASA
Infrared Telescope Facility (IRTF) library
refs.dat 69 54 References
table4.dat 92 168 Equivalent widths of the I-band indices. Part 1
table5.dat 88 168 Equivalent widths of the I-band indices. Part 2
table6.dat 103 168 Equivalent widths of the K-band indices. Part 1
table7.dat 103 168 Equivalent widths of the K-band indices. Part 2
--------------------------------------------------------------------------------
See also:
J/MNRAS/326/959 : Near-IR Ca triplet empirical calibration (Cenarro+ 2001)
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 --- Name Star name
19- 20 I2 h RAh Right ascension (J2000)
22- 23 I2 min RAm Right ascension (J2000)
25- 28 F4.1 s RAs Right ascension (J2000)
30 A1 --- DE- Declination sign (J2000)
31- 32 I2 deg DEd Declination (J2000)
34- 35 I2 arcmin DEm Declination (J2000)
37- 40 F4.1 arcsec DEs Declination (J2000)
42- 51 A10 --- SpType MK spectral type
54- 58 F5.2 mag VMAG ?=- Absolute V magnitude
60- 63 I4 K Teff ?=- Effective temperature
64 A1 --- n_Teff [*] Note on Teff (1)
66- 69 F4.2 [cm/s2] logg ?=- Surface gravity
71- 75 F5.2 [-] [Fe/H] ?=- Metallicity
77- 82 F6.2 mas plx ?=- Parallax
84- 85 I2 --- Ref ? Reference for Teff, log(g) and [Fe/H],
in refs.dat file
--------------------------------------------------------------------------------
Note (1): The temperatures with asterisks are obtained with the luminosity-
temperature relation of Carroll & Ostlie (1996, An Introduction to
Modern Astrophysics).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: refs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Ref Reference code
4- 22 A19 --- BibCode BibCode
24- 47 A24 --- Aut Author's name
49- 69 A21 --- Com Comments
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- LC [SGD] Type: Supergiant/Giant/Dwarf
3- 16 A14 --- Name Star name
17- 21 F5.2 0.1nm Ca1 CaII (0.8484-0.8513um) equivalent width
23- 26 F4.2 0.1nm e_Ca1 rms uncertainty on Ca1
28- 32 F5.2 0.1nm Ca2 CaII (0.8522-0.8562um) equivalent width
34- 37 F4.2 0.1nm e_Ca2 rms uncertainty on Ca2
39- 43 F5.2 0.1nm Ca3 CaII (0.8642-0.8682um) equivalent width
45- 48 F4.2 0.1nm e_Ca3 rms uncertainty on Ca3
50- 54 F5.2 0.1nm Pa1 HI (Paschen 0.8461-0.8474um) equivalent width
56- 59 F4.2 0.1nm e_Pa1 rms uncertainty on Pa1
61- 65 F5.2 0.1nm Pa2 HI (Paschen 0.8577-0.8619um) equivalent width
67- 70 F4.2 0.1nm e_Pa2 rms uncertainty on Pa2
72- 76 F5.2 0.1nm Pa3 HI (Paschen 0.8730-0.8772um) equivalent width
78- 81 F4.2 0.1nm e_Pa3 rms uncertainty on Pa3
83- 87 F5.2 0.1nm Mg MgI (0.8802-0.8811um) equivalent width
89- 92 F4.2 0.1nm e_Mg rms uncertainty on Mg
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- LC [SGD] Type: Supergiant/Giant/Dwarf
3- 16 A14 --- Name Star name
17- 21 F5.2 0.1nm Pa4 HI (Paschen 0.8850-0.8890um) equivalent width
23- 26 F4.2 0.1nm e_Pa4 rms uncertainty on Pa4
28- 32 F5.2 0.1nm Pa5 HI (Paschen 0.9000-0.9030um) equivalent width
34- 37 F4.2 0.1nm e_Pa5 rms uncertainty on Pa5
39- 43 F5.2 0.1nm FeClTi FeI+ClI+TiI (0.9080-0.9100um) equivalent width
45- 48 F4.2 0.1nm e_FeClTi rms uncertainty on FeClTi
50- 54 F5.2 0.1nm Pa6 HI (Paschen 0.9217-0.9255um) equivalent width
56- 59 F4.2 0.1nm e_Pa6 rms uncertainty on Pa6
61- 65 F5.1 0.1nm CaT Calcium triplet (Ca1+Ca2+Ca3) equivalent width
67- 69 F3.1 0.1nm e_CaT rms uncertainty on CaT
71- 75 F5.1 0.1nm PaT Paschen triplet (Pa1+Pa2+Pa3) equivalent width
77- 79 F3.1 0.1nm e_PaT rms uncertainty on PaT
81- 84 F4.1 0.1nm CaT* =CaT-0.93PaT: equivalent width of the Calcium
triplet without Paschen line contamination
86- 88 F3.1 0.1nm e_CaT* rms uncertainty on CaT*
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- LC [SGD] Type: Supergiant/Giant/Dwarf
3- 16 A14 --- Name Star name
17- 21 F5.2 0.1nm Fe1 FeI (1.9297-1.9327um) equivalent width
23- 26 F4.2 0.1nm e_Fe1 rms uncertainty on Fe1
28- 32 F5.2 0.1nm Brd HI (Brδ 1.9425-1.9470um) equivalent width
34- 37 F4.2 0.1nm e_Brd rms uncertainty on Brd
39- 43 F5.2 0.1nm Ca1K CaI (1.9500-1.9526) equivalent width
45- 48 F4.2 0.1nm e_Ca1K rms uncertainty on Ca1K
50- 54 F5.2 0.1nm Fe23 FeI (1.9583-1.9656) equivalent width
56- 59 F4.2 0.1nm e_Fe23 rms uncertainty on Fe23
61- 65 F5.2 0.1nm Si SiI (1.9708-1.9748um) equivalent width
67- 70 F4.2 0.1nm e_Si rms uncertainty on Si
72- 76 F5.2 0.1nm Ca2K CaI (1.9769-1.9795um) equivalent width
78- 81 F4.2 0.1nm e_Ca2K rms uncertainty on Ca2K
83- 87 F5.2 0.1nm Ca3K CaI (1.9847-1.9881um) (equivalent width
89- 92 F4.2 0.1nm e_Ca3K rms uncertainty on Ca3K
94- 98 F5.2 0.1nm Ca4K CaI (1.9917-1.9943um) equivalent width
100-103 F4.2 0.1nm e_Ca4K rms uncertainty on Ca4K
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- LC [SGD] Type: Supergiant/Giant/Dwarf
3- 16 A14 --- Name Star name
17- 21 F5.2 0.1nm Nad NaI (2.2000-2.2140um) equivalent width
23- 26 F4.2 0.1nm e_Nad rms uncertainty on Nad
28- 32 F5.2 0.1nm Cad CaI (2.2594-2.2700um) equivalent width
34- 37 F4.2 0.1nm e_Cad rms uncertainty on Cad
39- 43 F5.2 0.1nm 12CO 12CO(2,0) (2.2910-2.3070um) equivalent width
45- 48 F4.2 0.1nm e_12CO rms uncertainty on 12CO
50- 54 F5.2 0.1nm Mg1 MgI (2.1040-2.1110um) equivalent width
56- 59 F4.2 0.1nm e_Mg1 rms uncertainty on Mg1
61- 65 F5.2 0.1nm Brg HI (Brγ 2.1639-2.1686um) equivalent width
67- 70 F4.2 0.1nm e_Brg rms uncertainty on Brg
72- 76 F5.2 0.1nm FeA FeI (2.2250-2.2299um) equivalent width
78- 81 F4.2 0.1nm e_FeA rms uncertainty on FeA
83- 87 F5.2 0.1nm FeB FeI (2.2368-2.2414um) equivalent width
89- 92 F4.2 0.1nm e_FeB rms uncertainty on FeB
94- 98 F5.2 0.1nm Mg2 MgI (2.2795-2.2845um) equivalent width
100-103 F4.2 0.1nm e_Mg2 rms uncertainty on Mg2
--------------------------------------------------------------------------------
History:
* 23-Apr-2013: From electronic version of the journal
* 08-Jun-2013: Lines in table5 were mixed up, fixed.
(End) Patricia Vannier, Francois Ochsenbein [CDS] 23-Apr-2013