 G-mode patterns and parameters of gamma Dors observed with TESS (Garcia+, 2022)
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Internal rotation and buoyancy travel time of 60 gamma Doradus stars from 
uninterrupted TESS light curves spanning 352 days
     Garcia S., Van Reeth T., De Ridder J., Aerts C.
     
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Keywords: asteroseismology - waves - stars: rotation - stars: interiors 
          - stars: oscillations (including pulsations) - stars: catalogue

Abstract:
    Context. Gamma Doradus (hereafter gamma Dor) stars are gravity-mode 
    pulsators whose periods carry information about the internal structure of 
    the star. These periods are especially sensitive to the internal rotation 
    and chemical mixing, two processes that are currently not well constrained 
    in the theory of stellar evolution.
    Aims. We aim to identify the pulsation modes and deduce the internal 
    rotation and buoyancy travel time for 106 gamma Dor stars observed
    by the TESS mission in its southern continuous viewing zone (hereafter 
    S-CVZ). We rely on 140 previously detected period-spacing patterns, that is,
    series of (near-)consecutive pulsation mode periods.
    Methods. We used the asymptotic expression to compute gravity-mode 
    frequencies for ranges of the rotation rate and buoyancy travel time that 
    cover the physical range in γ Dor stars. Those frequencies were fitted to 
    the observed period-spacing patterns by minimizing a custom cost function. 
    The effects of rotation were evaluated using the traditional approximation 
    of rotation, using the stellar pulsation code GYRE.
    Results. We obtained the pulsation mode identification, internal rotation 
    and buoyancy travel time for 60 TESS gamma Dor stars. For the remaining 46 
    targets, the detected patterns are either too short or contained too many 
    missing modes for unambiguous mode identification, and longer light curves 
    are required. For the successfully analysed stars, we found that 
    period-spacing patterns from 1-yr long TESS light curves can constrain the 
    internal rotation and buoyancy travel time to a precision of 0.03 d^{−1} and
    400s, respectively, which is about half as precise as literature results 
    based on 4-yr Kepler light curves of gamma Dor stars.

Description:
    Electronic versions of Table A.1 and A.2 from the Appendix of 
    Garcia et al. (2022b), as well as all analysed g-mode period-spacing 
    patterns from this work (both the observed data files and figures).

File Summary:
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 FileName             Lrecl    Records    Explanations
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ReadMe                   80          .   This file
Table_A1.dat            178         62   TIC stars in the catalogue from Garcia
                                         et al. (2022) and their period-spacing 
                                         pattern parameters, derived for each 
                                         pattern that was successfully modelled.
Table_A2.dat            178         10   TIC stars in the catalogue from Garcia 
                                         et al. (2022) and their period-spacing 
                                         pattern parameters, derived for stars 
                                         with two detected period-spacing 
                                         patterns. The fit used both patterns 
                                         simultaneously.
tic<ticid>_spacings.dat 110          ?   generic format of the files in the 
                                         directory gmode_patterns/, containing 
                                         the detected g-mode period spacing 
                                         patterns from Garcia et al. (2022a).
tess<ticid>_k?m?.pdf    N/A        N/A   figures of the modelled g-mode period
                                         patterns in the directories 
                                         gmode_figures/table1/ and 
                                         gmode_figures/table2/.
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Byte-by-byte Description of file: Table_A1.dat
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   Bytes  Format Units   Label      Explanations
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   1-  9  I9     ---     TIC        TESS Input Catalogue identifier
  10- 18  F9.2   mag     m_TESS     magnitude in the wide-band TESS filter
  19- 27  F9.3   days    <P>        mean period of the detected period-spacing 
                                    pattern from Garcia et al. (2022)
  28- 35  F8.2   ks      <dP>       mean period spacing of the detected period-
                                    spacing pattern from Garcia et al. (2022)
   36-49  I14    ---     N_patterns number of period-spacing patterns detected 
                                    for a given star
   50-58  F9.3   1/day   frot       the measured near-core rotation frequency
   59-72  F14.3  1/day   e_frot_max the upper error margin of the rotation
                                    frequency
   73-86  F14.3  1/day   e_frot_min the lower error margin of the rotation
                                    frequency
   87-94  I4     s       Pi0        the measured buoyancy travel time
  95-107  I4     s       e_Pi0_max  the upper error margin of the measured 
                                    buoyancy travel time
 108-120  I4     s       e_Pi0_min  the lower error margin of the measured 
                                    buoyancy travel time
 121-125  I2     ---     k          mode identification parameter
 126-130  I2     ---     m          mode identification parameter; azimuthal 
                                    order
 131-139  I2     ---     n_long     radial order of the mode with the longest 
                                    period in the observed pattern
 140-154  I2     ---     Periods    number of observed mode periods in the 
                                    pattern
 155-164  I2     ---     n-span     range of overtones in the theoretical 
                                    pattern fitted to the data
 165-174  A1     ---     Hybrid     marker indicating whether the star was 
                                    classified as a hybrid pulsator by 
                                    Garcia et al. (2022a)
 175-178  I1     ---     Spec       number of epochs of spectra available either
                                    in the ESO arxiv or in GALAH DR3
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Byte-by-byte Description of file: Table_A2.dat
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   Bytes  Format Units   Label     Explanations
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   1-  9  I9     ---     TIC        TESS Input Catalogue identifier
  10- 18  F9.2   mag     m_TESS     magnitude in the wide-band TESS filter
  19- 27  F9.3   days    <P>        mean period of the detected period-spacing 
                                    pattern from Garcia et al. (2022)
  28- 35  F8.2   ks      <dP>       mean period spacing of the detected period-
                                    spacing pattern from Garcia et al. (2022)
   36-49  I14    ---     N_patterns number of period-spacing patterns detected 
                                    for a given star
   50-58  F9.3   1/day   frot       the measured near-core rotation frequency
   59-72  F14.4  1/day   e_frot_max the upper error margin of the rotation
                                    frequency
   73-86  F14.4  1/day   e_frot_min the lower error margin of the rotation
                                    frequency
   87-94  I4     s       Pi0        the measured buoyancy travel time
  95-107  I4     s       e_Pi0_max  the upper error margin of the measured 
                                    buoyancy travel time
 108-120  I4     s       e_Pi0_min  the lower error margin of the measured 
                                    buoyancy travel time
 121-125  I2     ---     k          mode identification parameter
 126-130  I2     ---     m          mode identification parameter; azimuthal 
                                    order
 131-139  I2     ---     n_long     radial order of the mode with the longest 
                                    period in the observed pattern
 140-154  I2     ---     Periods    number of observed mode periods in the 
                                    pattern
 155-164  I2     ---     n-span     range of overtones in the theoretical 
                                    pattern fitted to the data
 165-174  A1     ---     Hybrid     marker indicating whether the star was 
                                    classified as a hybrid pulsator by 
                                    Garcia et al. (2022a)
 175-178  I1     ---     Spec       number of epochs of spectra available either
                                    in the ESO arxiv or in GALAH DR3
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Byte-by-byte Description of file: tic<ticid>_spacings.dat
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   Bytes  Format Units    Label     Explanations
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   1- 14  12.10  days     per       pulsation period of a given g-mode
   15-30  12.10  days     e_per     error margin on the pulsation period of a 
                                    given g-mode
   31-46  13.10  ppt      ampl      amplitude of a given g-mode
   47-62  12.10  ppt      e_ampl    error margin on the amplitude of a given 
                                    g-mode
   63-78  13.10  2pi rad  phase     pulsation phase of a given g-mode
   79-94  12.10  2pi rad  phase     error margin on the pulsation phase of a 
                                    given g-mode
  95-110  13.10  ---      stopcrit  signal-to-noise ratio of a given g-mode
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Correspondence e-mail: Timothy Van Reeth <timothy.vanreeth@kuleuven.be>

References:
  2022A%26A...662A..82G
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(End)                         Timothy Van Reeth [IvS, KU Leuven]     17-Oct-2022
