J/A+A/671/A7 VPNEP. I. Initial data release (Strassmeier+, 2023)
VPNEP: Detailed characterization of TESS targets around the Northern Ecliptic
Pole. I. Survey design, pilot analysis, and initial data release.
Strassmeier K.G., Weber M., Gruner D., Ilyin I., Steffen M., Baratella M.,
Jarvinen S., Granzer T., Barnes S.A., Carroll T.A., Mallonn M.,
Sablowski D., Gabor P., Brown D., Corbally C., Franz M.
<Astron. Astrophys. 671, A7 (2023)>
=2023A&A...671A...7S 2023A&A...671A...7S (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Stars, late-type ; Abundances ; Atomic physics
Keywords: stars: atmospheres - stars: late-type - stars: abundances -
stars: activity - stars: fundamental parameters -
techniques: spectroscopic
Abstract:
We embarked on a high-resolution optical spectroscopic survey of
bright Transiting Exoplanet Survey Satellite (TESS) stars around the
Northern Ecliptic Pole (NEP), dubbed the Vatican-Potsdam-NEP survey
VPNEP.Aims. Our NEP coverage comprises ~=770 square degrees with 1067
stars of which 352 are bona-fide dwarf stars and 715 are giant stars,
all cooler than spectral type F0 and brighter than V=8.5mag. Our aim
is the characterization of these stars for further use by the
community.
Spectra are analyzed through comparisons with synthetic spectra.
Particular line profiles are analyzed by means of eigen-profiles,
equivalent widths and relative emission-line fluxes whenever
applicable.
Two R=200000 spectra are obtained for each of the stars with the
Vatican Advanced Technology Telescope (VATT) and the Potsdam Echelle
Polarimetric and Spectroscopic Instrument (PEPSI), and typically three
R=55000 spectra are obtained for the stars with STELLA and the STELLA
Echelle Spectrograph (SES). Combined with V-band magnitudes, Gaia eDR3
parallaxes, and isochrones from the Padova and Trieste Stellar
Evolutionary Code (PARSEC) the spectra are used to obtain radial
velocities, effective temperatures, gravities, rotational and
turbulence broadenings, stellar masses and ages, abundances for 27
chemical elements, isotope ratios for lithium and carbon, line
bisector spans, convective blue shifts if feasible, and the levels of
magnetic activity from Hα, Hβ and the CaII infrared
triplet. In this initial paper, we discuss our analysis tools and
biases, present first results from a pilot sub-sample of 54 stars (27
bona-fide dwarf stars observed with VATT+PEPSI and 27 bona-fide giant
stars observed with STELLA+SES), and make all reduced spectra
available to the community. An error analysis includes systematic
biases and standard deviations based on a joint target sample on both
facilities as well as a comparison with external data sources.
Description:
High-resolution spectra have been obtained of 1067 bright TESS stars
around the Northen Ecliptic Pole (NEP). In this first paper, we
present the results for the pilot stars. High-resolution spectra
(R=200000) for the dwarf stars in the sample were obtained using the
PEPSI spectrograph together with the VATT telescope. The SES
spectrograph and STELLA-II telescope were used to obtain the
high-resolution spectra (R=55000) for the giant stars. A linelist was
specially composed in order to calculate the equivalent widths and
chemical abundances of these stars. The VALD database was used in
conjuction with the NIST database and the Gaia-ESO line list in order
to select reliable spectral lines.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 91 172 Results from the ParSES analysis
tablea2.dat 48 55 Surface velocities from iSVD line profiles
tablea3.dat 57 54 APOFIS masses and ages
tablea4.dat 39 422 Atomic data line list
tablea5.dat 323 54 Chemical abundances
tablea6.dat 33 54 NLTE abundances for O and K
tablea7.dat 49 55 Lithium abundances and 12C/13C ratios
tablea8.dat 72 54 Absolute emission line fluxes
table5.dat 191 2837 Observation log
fits/* . 2837 Individual fits spectra
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Star Name of Target star
14- 22 F9.4 d BJD ? Barycentric Julian Date (BJD-2450000)
24- 29 F6.2 km/s RV ? Radial velocity
31- 34 F4.2 km/s e_RV ? Error for Radial velocity
36- 39 I4 K Teff Effective temperature
41- 43 I3 K e_Teff Error for Effective temperature
45- 48 F4.2 cm/s2 logg Logarithmic gravity
50- 53 F4.2 cm/s2 e_logg Error for Logarithmic gravity
55- 59 F5.2 --- [M/H] Metallicity
61- 64 F4.2 --- e_[M/H] ?=- Error for Metallicity
66- 69 F4.2 km/s xit Micro turbulence velocity
71- 74 F4.2 km/s e_xit Error for Micro turbulence velocity
76- 81 F6.2 km/s vsini Projected rotational broadening
83- 87 F5.2 km/s e_vsini Error for Projected rotational broadening
89- 91 A3 --- CD Cross disperser for PEPSI spectra
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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- 12 A12 --- Star Name of Target star
13 A1 --- n_Star [ab ] Note on Star (1)
14- 17 I4 --- Nlines ?=- Number of spectral lines used
19- 24 F6.2 km/s vsini ?=- Projected rotational velocity
26- 29 F4.2 km/s e_vsini ?=- Error for projected rotational velocity
31- 34 F4.2 km/s zetaRT ?=- Radial-tangential macro turbulence
36- 39 F4.2 km/s e_zetaRT ?=- Error for radial-tangential macro turbulence
41- 44 I4 m/s BIS ?=- Bisector velocity span
46- 48 I3 m/s e_BIS ?=- Error for bisector velocity span
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Note (1): Note on star for double-lined spectroscopic binaries (SB2) as follows:
a = primary star
b = secondary star
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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- 12 A12 --- Star Name of Target star
14- 17 F4.2 Msun Mass ?=- Stellar mass from APOFIS fit
19- 22 F4.2 Msun e_Mass ?=- Lower error for stellar mass from APOFIS fit
24- 27 F4.2 Msun E_Mass ?=- Upper error for stellar mass from APOFIS fit
29- 33 F5.2 yr logAge ?=- Stellar age from APOFIS fit
35- 38 F4.2 yr e_logAge ?=- Lower error for stellar age from APOFIS fit
40- 43 F4.2 yr E_logAge ?=- Upper error for stellar age from APOFIS fit
45- 52 A8 --- Label Estimate of evolutionary state
54- 57 A4 --- Flag Flag (1)
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Note (1): Flag as follows:
SB2 = double-lined spectroscopic binary
par? = inconsistent parameter coverage
v50 = star with vsin i>50km/s
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Byte-by-byte Description of file: tablea4.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- El Element symbol
4 I1 --- Ion [1/2] Degree of Ionisation (1)
6- 13 F8.3 0.1nm lambda Wavelength in air
15- 19 F5.3 eV EP Excitation potential
21- 26 F6.3 --- loggf Transition probability
28- 32 F5.1 0.1pm EWD ? Equivalent widths measured
from PEPSI solar spectrum
35- 39 F5.1 0.1pm EWG ? Equivalent widths measured
from SES solar spectrum
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Note (1): Ionisation stage as follows:
1 = neutral
2 = singly ionised
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Byte-by-byte Description of file: tablea5.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Star Name of Target star
14- 17 F4.2 --- A(C) ?=- Abundance of C
19- 22 F4.2 --- e_A(C) ?=- Error of C abundance
24- 27 F4.2 --- A(N) ?=- Abundance N
29- 32 F4.2 --- e_A(N) ?=- Error on N abundance
34- 37 F4.2 --- A(O) ?=- Abundance O
39- 42 F4.2 --- e_A(O) ?=- Error on O abundance
44- 47 F4.2 --- A(Na) ?=- Abundance of Na
49- 52 F4.2 --- e_A(Na) ?=- Error on Na abundance
54- 57 F4.2 --- A(Mg) ?=- Abundance of Mg
59- 62 F4.2 --- e_A(Mg) ?=- Error on Mg abundance
64- 67 F4.2 --- A(Al) ?=- Abundance of Al
69- 72 F4.2 --- e_A(Al) ?=- Error on Al abundance
74- 77 F4.2 --- A(Si) ?=- Abundance of Si
79- 82 F4.2 --- e_A(Si) ?=- Error on Si abundance
84- 87 F4.2 --- A(S) ?=- Abundance of S
89- 92 F4.2 --- e_A(S) ?=- Error on S abundance
94- 97 F4.2 --- A(K) ?=- Abundance of K
99-102 F4.2 --- e_A(K) ?=- Error on K abundance
104-107 F4.2 --- A(Ca) ?=- Abundance of Ca
109-112 F4.2 --- e_A(Ca) ?=- Error on Ca abundance
114-117 F4.2 --- A(ScI) ?=- Abundance of ScI
119-122 F4.2 --- e_A(ScI) ?=- Error on ScI abundance
124-127 F4.2 --- A(ScII) ?=- Abundance of ScII
129-132 F4.2 --- e_A(ScII) ?=- Error on ScII abundance
134-137 F4.2 --- A(TiI) ?=- Abundance of TiI
139-142 F4.2 --- e_A(TiI) ?=- Error on TiI abundance
144-147 F4.2 --- A(TiII) ?=- Abundance of TiII
149-152 F4.2 --- e_A(TiII) ?=- Error on TiII abundance
154-157 F4.2 --- A(V) ?=- Abundance of V
159-162 F4.2 --- e_A(V) ?=- Error on V abundance
164-167 F4.2 --- A(Cr) ?=- Abundance of Cr
169-172 F4.2 --- e_A(Cr) ?=- Error on Cr abundance
174-177 F4.2 --- A(Mn) ?=- Abundance of Mn
179-182 F4.2 --- e_A(Mn) ?=- Error on MnI abundance
184-187 F4.2 --- A(FeI) ?=- Abundance of FeI
189-192 F4.2 --- e_A(FeI) ?=- Error on FeI abundance
194-197 F4.2 --- A(FeII) ?=- Abundance of FeII
199-202 F4.2 --- e_A(FeII) ?=- Error on FeII abundance
204-207 F4.2 --- A(Co) ?=- Abundance of Co
209-212 F4.2 --- e_A(Co) ?=- Error on Co abundance
214-217 F4.2 --- A(Ni) ?=- Abundance of Ni
219-222 F4.2 --- e_A(Ni) ?=- Error on Ni abundance
224-227 F4.2 --- A(Cu) ?=- Abundance of Cu
229-232 F4.2 --- e_A(Cu) ?=- Error on Cu abundance
234-237 F4.2 --- A(Zn) ?=- Abundance of Zn
239-242 F4.2 --- e_A(Zn) ?=- Error on Zn abundance
244-247 F4.2 --- A(Y) ?=- Abundance of Y
249-252 F4.2 --- e_A(Y) ?=- Error on Y abundance
254-257 F4.2 --- A(ZrI) ?=- Abundance of ZrI
259-262 F4.2 --- e_A(ZrI) ?=- Error on ZrI abundance
264-267 F4.2 --- A(ZrII) ?=- Abundance of ZrII
269-272 F4.2 --- e_A(ZrII) ?=- Error on ZrII abundance
274-277 F4.2 --- A(Ba) ?=- Abundance of Ba
279-282 F4.2 --- e_A(Ba) ?=- Error on Ba abundance
284-287 F4.2 --- A(La) ?=- Abundance of La
289-292 F4.2 --- e_A(La) ?=- Error on La abundance
294-297 F4.2 --- A(Ce) ?=- Abundance of Ce
299-302 F4.2 --- e_A(Ce) ?=- Error on Ce abundance
304-307 F4.2 --- A(Eu) ?=- Abundance of Eu
309-312 F4.2 --- e_A(Eu) ?=- Error on Eu abundance
314-318 F5.2 --- [alpha/Fe] ?=- Alpha abundance: Averaged [Mg/H], [Si/H],
[Ca/H], [Ti/H], to Fe abundance ratio
320-323 F4.2 --- e_[alpha/Fe] ?=- Standard error on [alpha/Fe]
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Byte-by-byte Description of file: tablea6.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Star Name of target star
15- 18 F4.2 --- A(O) ? Logarithmic O abundance relative to solar
and H=12
20- 23 F4.2 --- e_A(O) ? Error for Logarithmic Li abundance
25- 28 F4.2 --- A(K) ? Logarithmic K abundance relative to solar
and H=12
30- 33 F4.2 --- e_A(K) ? Error for Isotope ratio 6Li over 7Li
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Byte-by-byte Description of file: tablea7.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Star Name of target star
14- 18 F5.2 --- A(Li) ?=- Logarithmic Li abundance relative to solar
and H=12
20- 23 F4.2 --- e_A(Li) ?=- Error for Logarithmic Li abundance
25- 28 F4.2 --- 6Li/7Li ?=- Isotope ratio 6Li over 7Li
30- 32 F3.1 --- e_6Li/7Li ?=- Error for Isotope ratio 6Li over 7Li
34- 38 F5.3 --- DLi ?=- Logarithmic Li 3D NLTE correction
40- 44 F5.1 --- 12C/13C ?=- Isotope ratio 12C over 13C
46- 49 F4.1 --- e_12C/13C ?=- Error for Isotope ratio 12C over 13C
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Byte-by-byte Description of file: tablea8.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Star Name of Target star
14- 17 F4.2 mag (B-V)0 Intrinsic Johnson B-V color
19- 21 I3 0.1pm W(Hb) H-beta equivalent width
23- 24 I2 0.1pm e_W(Hb) Error for H-beta equivalent width
26- 29 F4.2 --- W(Hb)/W(Ha) Ratio of equivalent widths H-beta/H-alpha
31- 34 F4.1 10-8W/m2 FHa ?=- Absolute emission-line flux in H-alpha
36- 39 F4.1 10-8W/m2 e_FHa ?=- Error for absolute emission-line flux
in H-alpha
41- 44 F4.1 10-8W/m2 FIRT1 ?=- Absolute emission-line flux
in CaII IRT-1
46- 48 F3.1 10-8W/m2 e_FIRT1 ?=- Error for absolute emission-line flux
in CaII IRT-1
50- 53 F4.1 10-8W/m2 FIRT2 ?=- Absolute emission-line flux
in CaII IRT-2
55- 57 F3.1 10-8W/m2 e_FIRT2 ?=- Error for absolute emission-line flux
in CaII IRT-2
59- 62 F4.1 10-8W/m2 FIRT3 ?=- Absolute emission-line flux
in CaII IRT-3
64- 66 F3.1 10-8W/m2 e_FIRT3 ?=- Error for absolute emission-line flux
in CaII IRT-3
68- 72 F5.2 [-] logR-IRT ?=- Logarithmic total radiative loss
in the CaII infrared triplet lines
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 41 A41 --- FileName Name of the fits spectrum file in
subdirectory fits (1)
44- 61 A18 --- Star Name of Target star
64- 65 I2 h RAh Right ascension (J2000)
67- 68 I2 min RAm Right ascension (J2000)
70- 73 F4.1 s RAs Right ascension (J2000)
76 A1 --- DE- Declination sign (J2000)
77- 78 I2 deg DEd Declination (J2000)
80- 81 I2 arcmin DEm Declination (J2000)
83- 87 F5.2 arcsec DEs Declination (J2000)
90- 94 F5.2 mag Vmag V magnitude
97-101 A5 --- Type Type: giant or dwarf
104-113 A10 "date" Obs.Date UT Date of observation
116-125 A10 "h:m:s" Obs.Time UT Time of exposure start
128-135 A8 "h:m:s" ExpTime Exposure time
139-141 I3 --- S/N Signal/noise
143-159 F17.9 d JD Julian Date (TCB)
162-171 A10 --- Inst Facility STELLA+SES or VATT+PEPSI
174-177 A4 --- CD PEPSI cross-dispersers
180-191 A12 --- SpType Spectral type
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Note (1): files are written as FITS binary tables:
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Bytes Format Units Label Explanations
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1- 8 F8.5 0.1nm Arg Wavelength in the solar system barycentric
wavelength scale (Angstroms)
9- 16 F8.5 --- Fun Continuum normalized intensity
17- 24 F8.1 --- Var Variance for each wavelength pixel
25- 26 A2 --- Mask A mask column for data processing
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Acknowledgements:
Klaus Strassmeier, kstrassmeier(at)aip.de
History:
28-Feb-2023: on-line version
22-Mar-2023: spectra added and table5.dat updated
(End) Patricia Vannier [CDS] 16-Jan-2023