J/MNRAS/540/1786 gr8stars. I. (Freckelton+, 2025)
gr8stars. I. A homogeneous spectroscopic study of bright FGKM dwarfs and a
public library of their high-resolution spectra.
Freckelton A.V., Mortier A., Bedell M., Morrell S., Naylor T.,
Buchhave L.A., Davies G.R., Gonzalez Hernandez J.I., Klein B.,
De Mooij E.J.W., Passegger V.M., Quirrenbach A., Roy A., Santos N.C.,
Sousa S.G., Suarez Mascareno A., Tsantaki M., Zhao L.L.
<Mon. Not. R. Astron. Soc. 540, 1786 (2025)>
=2025MNRAS.540.1786F 2025MNRAS.540.1786F (SIMBAD/NED BibCode)
ADC_Keywords: Stars, F-type ; Stars, G-type ; Stars, K-type ; Stars, M-type ;
Photometry ; Optical ; Infrared ; Radial velocities ;
Space velocities ; Abundances, [Fe/H] ; Spectroscopy
Keywords: techniques: spectroscopic - stars: atmospheres - stars: solar-type
Abstract:
As the fields of stellar and exoplanetary study grow and revolutionary
new detection instruments are created, it is imperative that a
homogeneous, precise source of stellar parameters is available. This
first work of the gr8stars collaboration presents the all-sky
magnitude limited sample of 5645 bright F, G, K, and M type dwarfs,
along with homogeneously derived spectroscopic parameters of a subset
of 1716 targets visible from the Northern hemisphere. We have
collected high-resolution archival and new spectra from several
instruments. Spectroscopic parameters are determined using the PAWS
pipeline, employing both the curve-of-growth equivalent width method,
and the spectral synthesis method. We achieve median uncertainties of
106K in stellar effective temperature, 0.08dex in surface gravity, and
0.03dex in metallicity. This paper also presents photometric stellar
parameters for these dwarfs, determined using spectral energy
distribution fitting. The full gr8stars sample selection, including
derived spectroscopic and photometric parameters, is made available
through an interactive online data base. We also perform a kinematic
analysis to classify these stars according to their Galactic
component.
Description:
The gr8stars catalogue provides an easy-to-access source of
homogeneously prepared one-dimensional spectra in the lab frame, in
addition to the full complement of Echelle order-by-order spectra
available for RV studies. Once completed using facilities from both
hemispheres, the catalogue will include 5645 FGKM main-sequence stars.
Spectra used to form the gr8stars catalogue were taken using the
Fiber-fed Extended Range Optical Spectrograph (FEROS), FIbre-fed
Echelle Spectrograph (FIES), High Accuracy Radial velocity Planet
Searcher (HARPS), High-Efficiency and high-Resolution Mercator Echelle
Spectrograph (HERMES), Spectrographe pour l'Observation des
Phenomenes des Interieurs stellaires et des Exoplanetes (SOPHIE),
and Ultraviolet and Visual Echelle Spectrograph (UVES)
high-resolution, optical spectrographs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
gr8stars.dat 748 2858 gr8stars catalog
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Byte-by-byte Description of file: gr8stars.dat
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Bytes Format Units Label Explanations
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1- 12 F12.8 deg RAdeg Right Ascension (J2000) (Radeg)
14- 26 F13.9 deg DEdeg Declination (J2000) (Dedeg)
28- 54 A27 --- Name Gr8stars Name (primary_name)
56- 63 A8 --- --- [Gaia DR3]
65- 83 A19 --- GaiaDR3 Gaia DR3 ID (gaiadr3sourceid)
85- 90 I6 --- HIP ?=- HIPPARCOS Identifier (hip)
94-100 A7 --- HD HD Identifier (hd)
102-111 I10 --- TIC ?=- TESS Input Catalogue Identifier (tic)
115-122 F8.4 mas plx Gaia DR3 Parallax (parallax)
124-132 F9.3 mas/yr pmRA Gaia DR3 Proper Motion in RA (pmra)
134-142 F9.3 mas/yr pmDE Gaia DR3 Proper Motion in DEC (pmdec)
144-151 F8.6 mag Gmag G band magnitude (Gaia DR3) (gmag)
153-160 F8.6 mag Bp-Rp BP-RP Colour (Gaia DR3) (bp_rp)
162-168 F7.2 km/s RV ?=- Gaia DR3 Radial Velocity
(radial_velocity)
170-173 A4 --- spH1D [True -] HARPS 1D Spectrum in Gr8stars
(spectrumharps1d)
175-178 A4 --- spH2D [True -] HARPS 2D Spectrum in Gr8stars
(spectrumharps2d)
180-183 A4 --- spS1D [True -] SOPHIE 1D Spectrum in Gr8stars
(spectrumsophie1d)
185-188 A4 --- spS2D [True -] SOPHIE 2D Spectrum in Gr8stars
(spectrumsophie2d)
190-195 F6.1 K Teff ?=- Spectroscopic Effective Temperature
from PAWS (Teff(K))
197-201 F5.1 K e_Teff ?=- Uncertainty in spectrosocpic effective
temperature from PAWS (Teff_err(K))
203-206 F4.2 [cm/s2] logg ?=- Spectroscopic logg from PAWS (logg)
208-211 F4.2 [cm/s2] e_logg ?=- Uncertainty in spectroscopic logg
from PAWS (logg_err)
213-217 F5.2 --- [Fe/H] ?=- Spectroscopic [Fe/H] from PAWS (Fe/H)
219-222 F4.2 --- e_[Fe/H] ?=- Uncertainty in spectroscopic [Fe/H]
from PAWS (Fe_err)
224-228 F5.2 km/s vmic ?=- Microturbulent Velocity from PAWS
(vmic)
230-234 F5.2 km/s e_vmic ?=- Uncertainty in microturbulent velocity
from PAWS (vmic_err)
236-240 F5.2 km/s vmac ?=- Macroturbulent velocity from PAWS
(vmac)
242-245 F4.2 km/s e_vmac ?=- Uncertainty in macroturbulent velocity
from PAWS (vmac_err)
247-252 F6.2 km/s vsini ?=- Projected rotational velocity from PAWS
(vsini)
254-258 F5.2 km/s e_vsini ?=- Uncertainty in projected rotational
velocity from PAWS (vsini_err)
260-278 A19 --- Inst Which instrument(s) the spectra used come
from (Instrument)
280-288 F9.4 K gdr3Teff ?=0 Gaia DR3 GSP-Phot effective temperature
(gdr3_teff)
290-300 F11.7 K e_gdr3Teff ?=0 Uncertainty in Gaia DR3 GSP-Phot
effective temperature (gdr3tefferr)
302-307 F6.4 [cm/s2] gdr3logg ?=0 Gaia DR3 GSP-Phot logg (gdr3_logg)
309-320 F12.10 [cm/s2] e_gdr3logg ?=0 Uncertainty in Gaia DR3 GSP-Phot logg
(gdr3loggerr)
322-328 F7.4 --- gdr3[Fe/H] ?=0 Gaia DR3 GSP-Phot [Fe/H] (gdr3_feh)
330-341 F12.10 --- e_gdr3[Fe/H] ?=0 Uncertainty in Gaia DR3 GSP-Phot [Fe/H]
(gdr3feherr)
343-348 F6.3 mag W1mag ?=- AllWISE W1 magnitude (w1mpro)
350-354 F5.3 mag e_W1mag ?=- Uncertainty in AllWISE W1 magnitude
(w1sigmpro)
356-361 F6.3 mag W2mag ?=- AllWISE W2 magnitude (w2mpro)
363-367 F5.3 mag e_W2mag ?=- Uncertainty in AllWISE W2 magnitude
(w2sigmpro)
369-374 F6.3 mag W3mag ?=- AllWISE W3 magnitude (w3mpro)
376-380 F5.3 mag e_W3mag ?=- Uncertainty in AllWISE W3 magnitude
(w3sigmpro)
382-387 F6.3 mag Jmag ?=- J Band magnitude (2MASS) (j_m)
389-393 F5.3 mag e_Jmag ?=- Uncertainty in J band magnitude
(2MASS) (j_msigcom)
395-399 F5.3 mag Hmag ?=- H Band magnitude (2MASS) (h_m)
401-405 F5.3 mag e_Hmag ?=- Uncertainty in H band magnitude
(2MASS) (h_msigcom)
407-412 F6.3 mag Kmag ?=- K Band magnitude (2MASS) (k_m)
414-418 F5.3 mag e_Kmag ?=- Uncertainty in K band magnitude
(2MASS) (k_msigcom)
420-425 F6.3 mag Bmag B Band magnitude (Bmag)
427-432 F6.3 mag e_Bmag Uncertainty in B band magnitude (e_Bmag)
434-439 F6.3 mag Vmag V band magnitude (Vmag)
441-445 F5.3 mag e_Vmag Uncertainty in V band magnitude (e_Vmag)
447-467 F21.16 km/s U ?=- Velocity towards galactic centre (U)
469-486 F18.16 km/s e_U Uncertainty in velocity towards galactic
centre (eU)
488-508 F21.16 km/s V ?=- Velocity in direction of galactic
rotation (V)
510-527 F18.16 km/s e_V Uncertainty in velocity in direction of
galactic rotation (eV)
529-549 F21.16 km/s W ?=- Velocity towards galactic North Pole
(W)
551-568 F18.16 km/s e_W Uncertainty in velocity towards galactic
North Pole (eW)
570-578 A9 --- LikeMemb Most likely galactic classification
(likely_membership)
580-595 F16.13 --- MembProb ?=- Probability of beginning to assigned
galactic classification
(membership_probability)
597-605 A9 --- Otype SIMBAD Primary Object Type (OTYPE)
607-620 A14 --- Id SIMBAD Primary identifier (Id)
622-624 A3 --- PlanetHost [Yes -] Is the star a known planet host
(as of 2025) (Planet_host)
626-628 A3 --- SB2 [Yes -] Is the star a known double-lined
binary (as of 2025) (SB2)
630-642 F13.11 mag A550nm ?=- Extinction at 550nm (A_550nm)
644-661 F18.16 --- chisqSED ?=- Chisquared of SED fitting (chisq_SED)
663-665 F3.1 --- nptsSED ?=- Number of data points used in SED
fitting (npts_SED)
667-683 F17.15 Rsun radiusSED ?=- Stellar Radius from SED fitting
(radius_SED)
685-695 F11.9 Rsun b_radiusSED ?=- Upper bound of stellar radius from SED
fitting (radiusSEDubound)
697-707 F11.9 Rsun B_radiusSED ?=- Lower bound of stellar radius from SED
fitting (radiusSEDlbound)
709-714 F6.1 K TeffSED ?=- Effective temperature from SED fitting
(Teff_SED)
716-725 F10.5 K b_TeffSED ?=- Upper bound on effective temperature
from SED fitting (TeffSEDubound)
727-736 F10.5 K B_TeffSED ?=- Lower bound on effective temperature
from SED fitting (TeffSEDlbound)
738-742 A5 --- FiltFlag [False True -] Was OTYPE used to filter
out SED results? (filteredotypesflag)
744-748 A5 --- goodFlag [False True -] Is SED considered good
(good_flag)
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Acknowledgements:
Alix Violet Freckelton, xf859(at)student.bham.ac.uk
(End) Patricia Vannier [CDS] 05-Aug-2025