J/MNRAS/502/1947 Giant stars in TESS continuous viewing zones (Mackereth+, 2021)
Prospects for Galactic and stellar astrophysics with asteroseismology of giant
stars in the TESS continuous viewing zones and beyond.
Mackereth J.T., Miglio A., Elsworth Y., Mosser B., Mathur S., Garcia R.A.,
Nardiello D., Hall O.J., Vrard M., Ball W.H., Basu S., Beaton R.L.,
Beck P.G., Bergemann M., Bossini D., Casagrande L., Campante T.L.,
Chaplin W.J., Chiappini C., Girardi L., Jorgensen A.C.S., Khan S.,
Montalban J., Nielsen M.B., Pinsonneault M.H., Rodrigues T.S.,
Serenelli A., Silva Aguirre V., Stello D., Tayar J., Teske J.,
van Saders J.L., Willett E.
<Mon. Not. R. Astron. Soc., 502, 1947-1966 (2021)>
=2021MNRAS.502.1947M 2021MNRAS.502.1947M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, giant ; Milky Way ; Parallaxes, trigonometric ;
Proper motions ; Effective temperatures ; Abundances, [Fe/H] ;
Stars, masses ; Stars, ages ; Stars, diameters ; Optical ;
Infrared
Keywords: stars: fundamental parameters - stars: oscillations -
Galaxy: fundamental parameters - Galaxy: kinematics and dynamics -
Galaxy: stellar content - Galaxy: structure
Abstract:
The NASA Transiting Exoplanet Survey Satellite (NASA-TESS) mission
presents a treasure trove for understanding the stars it observes and
the Milky Way, in which they reside. We present a first look at the
prospects for Galactic and stellar astrophysics by performing initial
asteroseismic analyses of bright (G<11) red giant stars in the TESS
southern continuous viewing zone (SCVZ). Using three independent
pipelines, we detect νmax and Δν in 41 per cent of the
15405 star parent sample (6388 stars), with consistency at a level of
∼2 per cent in νmax and ∼5 per cent in Δν. Based on
this, we predict that seismology will be attainable for ∼3x105
giants across the whole sky and at least 104 giants with ≥1yr of
observations in the TESS-CVZs, subject to improvements in analysis and
data reduction techniques. The best quality TESS-CVZ data, for 5574
stars where pipelines returned consistent results, provide
high-quality power spectra across a number of stellar evolutionary
states. This makes possible studies of, for example, the asymptotic
giant branch bump. Furthermore, we demonstrate that mixed l=1 modes
and rotational splitting are cleanly observed in the 1-yr data set. By
combining TESS-CVZ data with TESS-HERMES, SkyMapper, APOGEE, and Gaia,
we demonstrate its strong potential for Galactic archaeology studies,
providing good age precision and accuracy that reproduces well the age
of high [α/Fe] stars and relationships between mass and
kinematics from previous studies based on e.g. Kepler. Better quality
astrometry and simpler target selection than the Kepler sample makes
this data ideal for studies of the local star formation history and
evolution of the Galactic disc. These results provide a strong case
for detailed spectroscopic follow-up in the CVZs to complement that
which has been (or will be) collected by current surveys.
Description:
We compile a target list of stars in and near to the TESS southern
continuous viewing zone (SCVZ), by making a cone-search from Gaia DR2
(Gaia Collaboration 2018A&A...616A...1G 2018A&A...616A...1G, Cat. I/345) within 20° of
the southern ecliptic pole. We cross-match this set with 2MASS
(Skrutskie et al. 2006AJ....131.1163S 2006AJ....131.1163S, Cat. VII/233) and select stars
with G<11 and parallax signal-to-noise >20. We then select stars with
(J-KS)>0.5 and MH<3 (estimating MH using only the inverted
parallax and ignoring the effects of extinction - although we do
account for this later), isolating a final sample of 15405 giant
stars.
We extract photometry from the TESS FFIs for all 15405 stars in the
target list, following the methods presented in Nardiello et al.
(2019MNRAS.490.3806N 2019MNRAS.490.3806N, Cat. J/MNRAS/490/3806).
The power spectra are analysed by three pipelines to determine the
global parameters νmax, the frequency at maximum power, and
Δν, the mean spacing between pressure modes of the same
degree l at successive radial orders. The pipelines in question are
presented in Mosser & Appourchaux (2009A&A...508..877M 2009A&A...508..877M), Elsworth et
al. (2020RNAAS...4..177E 2020RNAAS...4..177E), and Mathur et al. (2010A&A...511A..46M 2010A&A...511A..46M); we
refer to them here as COR, BHM, and A2Z, respectively (similarly to,
e.g. Pinsonneault et al. 2018ApJS..239...32P 2018ApJS..239...32P, Cat. J/ApJS/239/32).
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tabled1.dat 2287 15405 The data model of the catalogue of TESS-SCVZ
targets which we release in this work
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
II/358 : SkyMapper Southern Sky Survey. DR1.1 (Wolf+, 2018)
III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)
J/MNRAS/473/2004 : TESS-HERMES Survey Data Release 1 catalog (Sharma+, 2018)
Byte-by-byte Description of file: tabled1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 I19 --- GaiaDR2 Gaia DR2 source identifier
21- 29 I9 --- TIC TIC identifier
31- 32 I2 --- Nsec Number of sectors star was observed in
34- 52 F19.15 deg RAdeg Right ascension (ICRS) at Ep=2015.5
54- 73 F20.18 mas e_RAdeg Error on RAdeg
75- 93 F19.15 deg DEdeg Declination (ICRS) at Ep=2015.5
95- 114 F20.18 mas e_DEdeg Error on DEdeg
116- 133 F18.14 deg GLON Galactic longitude
135- 153 F19.15 deg GLAT Galactic latitude
155- 176 F22.18 deg ELON Ecliptic longitude
178- 195 F18.14 deg ELAT Ecliptic latitude
197- 216 F20.17 mas plx Parallax from Gaia DR2
218- 237 F20.18 mas e_plx Error on plx
239- 263 E25.20 mas/yr pmRA Proper motion in right ascension from
Gaia DR2
265- 284 F20.18 mas/yr e_pmRA Error on pmRA
286- 309 F24.19 mas/yr pmDE Proper motion in declination from Gaia
DR2
311- 330 F20.18 mas/yr e_pmDE Error on pmDE
332- 355 F24.20 km/s RV ? Radial velocity
357- 376 F20.17 km/s e_RV ? Error on RV
378- 400 E23.20 --- RADEcor Correlation between right ascension
and declination
402- 424 E23.20 --- RAPlxcor Correlation between right ascension
and parallax
426- 448 E23.20 --- RApmRAcor Correlation between right ascension
and proper motion in right ascension
450- 472 E23.20 --- RApmDEcor Correlation between right ascension
and proper motion in declination
474- 496 E23.20 --- DEPlxcor Correlation between declination and
parallax
498- 520 E23.20 --- DEpmRAcor Correlation between declination and
proper motion in right ascension
522- 544 F23.20 --- DEpmDEcor Correlation between declination and
proper motion in declination
546- 568 E23.20 --- PlxpmRAcor Correlation between parallax and
proper motion in right ascension
570- 592 E23.20 --- PlxpmDEcor Correlation between parallax and
proper motion in declination
594- 616 E23.20 --- pmRApmDEcor Correlation between proper motion in
right ascension and proper motion in
declination
618- 637 F20.17 mag Hmag 2MASS H-band magnitude
639- 658 F20.17 mag Jmag 2MASS J-band magnitude
660- 679 F20.17 mag Ksmag 2MASS Ks-band magnitude
681- 699 F19.16 mag Gmag Gaia DR2 G-band magnitude
701- 719 F19.16 mag BPmag Gaia DR2 BP-band magnitude
721- 739 F19.16 mag RPmag Gaia DR2 RP-band magnitude
741- 763 F23.20 mag AKs Extinction in the Ks-band
765- 772 F8.2 muHz numaxCOR ?=-9999 νmax from COR pipeline
774- 781 F8.2 muHz e_numaxCOR ?=-9999 Error on numaxCOR
783- 791 F9.3 muHz dnuCOR ?=-9999 Δν from COR pipeline
793- 801 F9.3 muHz e_dnuCOR ?=-9999 Error on dnuCOR
803- 810 F8.2 muHz numaxBHM ?=-9999 νmax from BHM pipeline
812- 824 F13.7 muHz e_numaxBHM ?=-9999 Error on numaxBHM
826- 837 F12.6 muHz dnuBHM ?=-9999 Δν from BHM pipeline
839- 851 F13.7 muHz e_dnuBHM ?=-9999 Error on dnuBHM
853- 860 F8.2 muHz numaxA2Z ?=-9999 νmax from A2Z pipeline
862- 869 F8.2 muHz e_numaxA2Z ?=-9999 Error on numaxA2Z
871- 878 F8.2 muHz dnuA2Z ?=-9999 Δν from A2Z pipeline
880- 887 F8.2 muHz e_dnuA2Z ?=-9999 Error on dnuA2Z
889- 908 F20.16 muHz numaxmean ? Mean νmax between all pipelines
returning results
910- 930 F21.18 muHz e_numaxmean ? Error on numaxmean
932- 951 F20.17 muHz dnumean ? Mean Δν between all
pipelines returning results
953- 975 F23.19 muHz e_dnumean ? Error on dnumean
977 I1 --- Npip Number of pipelines included in mean
979 I1 --- fseismic Flag indicating all pipeline results
for νmax and Δν within
1σ of global mean
981-1003 F23.17 [cm/s2] loggHERMES ?=-9999 Surface gravity from
TESS-HERMES
1005-1027 F23.17 [cm/s2] e_loggHERMES ?=-9999 Error on loggHERMES
1029-1032 I4 K TeffSM ?=0 Effective temperature from
SkyMapper
1034-1036 I3 K e_TeffSM ?=0 Error on TeffSM
1038-1062 F25.19 [-] [Fe/H]SM ?=-9999 Fe/H abundance ratio from
SkyMapper
1064-1086 F23.17 [-] e_[Fe/H]SM ?=-9999 Error on [Fe/H]SM
1088-1112 F25.19 --- eMB14 ?=-9999 Orbit eccentricity in
MWPotential2014
1114-1139 F26.20 --- e_eMB14 ?=-9999 Error on eMB14
1141-1164 F24.18 kpc RperiMB14 ?=-9999 Pericentre radius in
MWPotential2014
1166-1191 E26.20 kpc e_RperiMB14 ?=-9999 Error on RperiMB14
1193-1214 F22.16 kpc RapoMB14 ?=-9999 Apocentre radius in
MWPotential2014
1216-1241 E26.20 kpc e_RapoMB14 ?=-9999 Error on RapoMB14
1243-1266 F24.18 kpc zmaxMB14 ?=-9999 Maximum vertical excursion in
MWPotential2014
1268-1293 F26.20 kpc e_zmaxMB14 ?=-9999 Error on zmaxMB14
1295-1312 A18 --- APOGEE APOGEE identifier in DR16
(2MHHMMSSss+DDMMSSs)
1314-1339 F26.20 [-] [Fe/H]APO ?=-9999 Fe/H abundance ratio from
APOGEE (DR16)
1341-1365 F25.19 [-] e_[Fe/H]APO ?=-9999 Error on [Fe/H]APO
1367-1392 E26.20 [-] [Mg/Fe]APO ?=-9999 Mg/Fe abundance ratio from
APOGEE (DR16)
1394-1417 F24.18 [-] e_[Mg/Fe]APO ?=-9999 Error on [Mg/Fe]APO
1419-1440 F22.16 [cm/s2] loggAPO ?=-9999 Surface gravity from APOGEE
(DR16)
1442-1465 F24.18 [cm/s2] e_loggAPO ?=-9999 Error on loggAPO
1467-1484 F18.12 K TeffAPO ?=-9999 Effective temperature from
APOGEE (DR16)
1486-1506 F21.15 K e_TeffAPO ?=-9999 Error on TeffAPO
1508-1519 F12.6 Gyr AgeBHM ?=-9999 Age from PARAM, based on BHM
and SkyMapper
1521-1532 F12.6 Gyr b_AgeBHM ?=-9999 Lower bound on AgeBHM
1534-1545 F12.6 Gyr B_AgeBHM ?=-9999 Upper bound on AgeBHM
1547-1558 F12.6 Msun MassBHM ?=-9999 Mass from PARAM, based on BHM
and SkyMapper
1560-1571 F12.6 Msun b_MassBHM ?=-9999 Lower bound on MassBHM
1573-1584 F12.6 Msun B_MassBHM ?=-9999 Upper bound on MassBHM
1586-1597 F12.6 Rsun RadBHM ?=-9999 Radius from PARAM, based on
BHM and SkyMapper
1599-1610 F12.6 Rsun b_RadBHM ?=-9999 Lower bound on RadBHM
1612-1623 F12.6 Rsun B_RadBHM ?=-9999 Upper bound on RadBHM
1625-1635 F11.5 --- chi2BHM ?=-9999 Chi-squared from PARAM, based
on BHM and SkyMapper
1637-1648 F12.6 mag MbolBHM ?=-9999 Bolometric magnitude from
PARAM, based on BHM and SkyMapper
without using luminosity as a
constraint
1650-1661 F12.6 mag b_MbolBHM ?=-9999 Lower bound on Mbol
1663-1674 E12.6 mag B_MbolBHM ?=-9999 Upper bound on Mbol
1676-1687 F12.6 Gyr AgeAPO ?=-9999 Age from PARAM, based on BHM
and APOGEE
1689-1700 F12.6 Gyr b_AgeAPO ?=-9999 Lower bound on AgeAPO
1702-1713 F12.6 Gyr B_AgeAPO ?=-9999 Upper bound on AgeAPO
1715-1726 F12.6 Msun MassAPO ?=-9999 Mass from PARAM, based on BHM
and APOGEE
1728-1739 F12.6 Msun b_MassAPO ?=-9999 Lower bound on MassAPO
1741-1752 F12.6 Msun B_MassAPO ?=-9999 Upper bound on MassAPO
1754-1765 F12.6 Rsun RadAPO ?=-9999 Radius from PARAM, based on
BHM and APOGEE
1767-1778 F12.6 Rsun b_RadAPO ?=-9999 Lower bound on RadAPO
1780-1791 F12.6 Rsun B_RadAPO ?=-9999 Upper bound on RadAPO
1793-1803 F11.5 --- chi2APO ?=-9999 Chi-squared from PARAM, based
on BHM and APOGEE
1805-1828 F24.18 Lsun LBHM ?=-9999 Luminosity from seismic
scaling relations applied to BHM
1830-1851 F22.16 Lsun B_LBHM ?=-9999 Upper bound on LBHM
1853-1877 E25.19 Lsun b_LBHM ?=-9999 Lower bound on LBHM
1879-1900 F22.16 Lsun LCOR ?=-9999 Luminosity from seismic
scaling relations applied to COR
1902-1923 F22.16 Lsun B_LCOR ?=-9999 Upper bound on LCOR
1925-1946 F22.16 Lsun b_LCOR ?=-9999 Lower bound on LCOR
1948-1969 F22.16 Lsun LA2Z ?=-9999 Luminosity from seismic
scaling relations applied to A2Z
1971-1993 F23.16 Lsun B_LA2Z ?=-9999 Upper bound on LA2Z
1995-2017 F23.17 Lsun b_LA2Z ?=-9999 Lower bound on LA2Z
2019-2040 F22.16 Lsun LHERMES ?=-9999 Luminosity based on 2MASS
photometry and bolometric correction
based on TESS-HERMES
2042-2063 F22.16 Lsun b_LHERMES ?=-9999 Lower bound on LHERMES
2065-2086 F22.16 Lsun B_LHERMES ?=-9999 Upper bound on LHERMES
2088-2109 F22.16 Lsun LSMGAIA ?=-9999 Luminosity based on 2MASS
photometry and bolometric correction
based on SkyMapper and Gaia DR2
parallax
2111-2132 F22.16 Lsun b_LSMGAIA ?=-9999 Lower bound on LSMGAIA
2134-2155 F22.16 Lsun B_LSMGAIA ?=-9999 Upper bound on LSMGAIA
2157-2178 F22.16 Lsun LAPOGAIA ?=-9999 Luminosity based on 2MASS
photometry and bolometric correction
based on APOGEE and Gaia DR2 parallax
2180-2201 F22.16 Lsun b_LAPOGAIA ?=-9999 Lower bound on LAPOGAIA
2203-2224 F22.16 Lsun B_LAPOGAIA ?=-9999 Upper bound on LAPOGAIA
2226-2227 I2 --- evstate Evolutionary state using Vrard et al.
(2018RNAAS...2..216N 2018RNAAS...2..216N) (1)
2229 I1 --- evstateag Evolutionary state agreement (1)
2231 I1 --- f_LBHM Flag on LBHM (2)
2233 I1 --- f_LCOR Flag on LCOR (2)
2235 I1 --- f_LA2Z Flag on LA2Z (2)
2237 I1 --- qfnumaxdnu Quality flag indicating if results on
νmax and Δν are
consistent within 3σ across all
pipelines (1:yes, 0:no)
2239-2262 F24.18 muHz numaxpred ? νmax predicted using 2MASS
photometry and Gaia DR2 parallax
2264-2287 F24.18 muHz e_numaxpred ? Error on numaxpred
--------------------------------------------------------------------------------
Note (1): Evolutionary state as follows:
0 = RGB
1 = RC
-1 = unclassified
Note (2): Flag as follows:
-1 = photometric and seismic luminosity agree within 3σc
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 27-Oct-2023