J/A+A/577/A128 CARMENES input catalogue of M dwarfs. I (Alonso-Floriano+, 2015)
CARMENES input catalogue of M dwarfs. I. Low-resolution spectroscopy with CAFOS.
Alonso-Floriano F.J., Morales J.C., Caballero J.A., Montes D., Klutsch A.,
Mundt R., Cortes-Contreras M., Ribas I., Reiners A., Amado P.J.,
Quirrenbach A., Jeffers S.V.
<Astron. Astrophys. 577, A128 (2015)>
=2015A&A...577A.128A 2015A&A...577A.128A
ADC_Keywords: Stars, standard ; Stars, dwarfs ; Stars, M-type ;
Stars, late-type ; Spectral types; Spectroscopy
Keywords: stars: activity - stars: late-type - stars: low-mass
Abstract:
CARMENES is a stabilised, high-resolution, double-channel spectrograph
at the 3.5m Calar Alto telescope. It is optimally designed for
radial-velocity surveys of M dwarfs with potentially habitable
Earth-mass planets.
We prepare a list of the brightest, single M dwarfs in each spectral
subtype observable from the northern hemisphere, from which we will
select the best planet-hunting targets for CARMENES.
In this first paper on the preparation of our input catalogue, we
compiled a large amount of public data and collected low-resolution
optical spectroscopy with CAFOS at the 2.2m Calar Alto telescope for
753 stars. We derived accurate spectral types using a dense grid of
standard stars, a double least-squares minimisation technique, and 31
spectral indices previously defined by other authors. Additionally, we
quantified surface gravity, metallicity, and chromospheric activity
for all the stars in our sample.
We calculated spectral types for all 753 stars, of which 305 are new
and 448 are revised. We measured pseudo-equivalent widths of Hα
for all the stars in our sample, concluded that chromospheric activity
does not affect spectral typing from our indices, and tabulated 49
stars that had been reported to be young stars in open clusters,
moving groups, and stellar associations. Of the 753 stars, two are new
subdwarf candidates, three are T Tauri stars, 25 are giants, 44 are K
dwarfs, and 679 are M dwarfs. Many of the 261 investigated dwarfs in
the range M4.0-8.0 V are among the brightest stars known in their
spectral subtype.
Description:
List of 753 late-type stars, mostly M dwarfs, observed with the
low-resolution optical spectrograph CAFOS at the 2.2m Calar Alto
telescope for the preparation of the CARMENES input catalogue
(http://carmenes.caha.es/). We provide basic data, observation
parameters, spectral-typing indices, zeta metallicity index, Hα
pseudo-equivalent width, spectral type from the literature, and our
accurate adopted spectral type.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 109 753 Basic star data, observing date and exposure time
tablea2.dat 75 753 Spectral indices, zeta index and pEW(Hα)
tablea3.dat 94 753 Spectral type from literature and our work
refs.dat 114 61 References
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See also:
III/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997)
J/AJ/142/138 : All-sky catalog of bright M dwarfs (Lepine+, 2011)
J/AJ/145/102 : Bright M dwarfs in the northern sky spectroscopy (Lepine+, 2013)
J/A+A/597/A47 : CARMENES input catalogue of M dwarfs. II
(Cortes-Contreras+ 2017)
J/A+A/621/A126 : CARMENES input catalogue of M dwarfs. IV. (Diez Alonso+ 2019)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- No [1/753] Our star number
5- 17 A13 --- Karmn Our CARMENES star identification (JHHMMm+DDdAAA)
19- 41 A23 --- Name Discovery or most common name
43- 50 A8 --- Gl/GJ Gliese or Gliese & Jahreiss star number
53- 54 I2 h RAh Right ascension (J2000.0)
56- 57 I2 min RAm Right ascension (J2000.0)
59- 63 F5.2 s RAs Right ascension (J2000.0)
65 A1 --- DE- Declination sign (J2000.0)
66- 67 I2 deg DEd Declination (J2000.0)
69- 70 I2 arcmin DEm Declination (J2000.0)
72- 76 F5.2 arcsec DEs Declination (J2000.0)
77- 81 F5.2 mag Jmag ? J-band magnitude
83- 93 A11 "date" Date Date of CAFOS observation
95 I1 --- Nexp Number of exposure
96 A1 --- --- [x]
97-102 F6.1 s texp Exposure time
103 A1 --- --- [+]
104 I1 --- Nexp2 ? Second number of exposure
105 A1 --- --- [x]
106-109 I4 s texp2 ? Second exposure time
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Karmn Our CARMENES star identification
15- 19 F5.3 --- PC1 PC1 spectral index [7030-7050/6525-6550]
(Martin et al. 1996ApJ...469..706M 1996ApJ...469..706M)
21- 25 F5.3 --- TiO2 TiO2 spectral index [7058-7061/7043-7046]
(Reid et al. 1995AJ....110.1838R 1995AJ....110.1838R, Cat. III/198)
27- 31 F5.3 --- TiO5 TiO5 spectral index [7126-7135/7042-7046]
(Reid et al. 1995AJ....110.1838R 1995AJ....110.1838R, Cat. III/198)
33- 37 F5.3 --- VO VO-7912 spectral index [7430-7470/7550-7570]
(Martin et al. 1999AJ....118.2466M 1999AJ....118.2466M)
39- 43 F5.3 --- Col-M Color-M spectral index [8105-8155/6510-6560]
(Lepine et al. 2003, Cat. J/AJ/125/1598)
45- 49 F5.3 --- CaH2 CaH2 spectral index [6814-6846/7042-7046]
(Reid et al. 1995AJ....110.1838R 1995AJ....110.1838R, Cat. III/198)
51- 55 F5.3 --- CaH3 CaH3 spectral index [6960-6990/7042-7046]
(Reid et al. 1995AJ....110.1838R 1995AJ....110.1838R, Cat. III/198)
57- 61 F5.3 --- zeta [0.1/7.3] ζ metallicity spectral index
(Lepine et al. 2007ApJ...669.1235L 2007ApJ...669.1235L) (1)
63- 67 F5.1 0.1nm pEWa [-26/3] Pseudo-equivalent width of Hα line
69- 71 F3.1 0.1nm e_pEWa [0.1/2] Error in pEW(Ha) (lower value)
73- 75 F3.1 0.1nm E_pEWa [0.1/6] Error in pEW(Ha) (upper value)
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Note (1): the ζ-index is defined as
ζ = (1-TiO5)/(1-[TiO5]Z), where
[TiO5]Z = 0.571 - 1.697CaH + 1.841CaH2 - 0.454CaH3
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Karmn Our CARMENES star identification
16- 30 A15 --- SpTl Spectral type from bibliography
32- 47 A16 --- r_SpTl Comma-separated references for SpT from
bibliography, in refs.dat file
48- 49 A2 --- l_SpTb [≤ ] Limit flag on SpTb
50- 53 F4.1 --- SpTb ?=- Spectral type from best-fit match
55- 56 A2 --- l_SpTc [≤> ] Limit flag on SpTc
57- 60 F4.1 --- SpTc ?=- Spectral type from χ2 match
62- 65 F4.1 --- SpT2 ?=- Spectral type from TiO2 index
67- 70 F4.1 --- SpT5 ?=- Spectral type from TiO5 index
72- 75 F4.1 --- SpTP ?=- Spectral type from PC1 index
77- 80 F4.1 --- SpTR ?=- Spectral type from VO-7912 index
82- 85 F4.1 --- SpTC ?=- Spectral type from Color-M index
87 A1 --- l_SpT Limit flag on SpT
88- 94 A7 --- SpT Adopted spectral type
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Ref Reference code
9- 27 A19 --- BibCode BibCode
29- 51 A23 --- Aut Author's name
53-114 A62 --- Com Comments
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Acknowledgements:
Jose A. Caballero, caballero(at)cab.inta-csic.es
F. Javier Alonso-Floriano, fjalonso(at)fis.ucm.es
References:
Cortes-Contreras et al., Paper II 2017A&A...597A..47C 2017A&A...597A..47C, Cat. J/A+A/597/A47
Jeffers et al., Paper III 2018A&A...614A..76J 2018A&A...614A..76J
Diez Alonso et al., Paper IV 2019A&A...621A.126D 2019A&A...621A.126D, Cat. J/A+A/621/A126
(End) Jose Caballero [CAB, Spain], Patricia Vannier [CDS] 26-Mar-2015