J/AJ/164/254 TESS observation & NEID radial velocity of HD 35833 (Gupta+, 2022)
Detection of p-mode Oscillations in HD 35833 with NEID and TESS.
Gupta A.F., Luhn J., Wright J.T., Mahadevan S., Ford E.B., Stefansson G.,
Bender C.F., Blake C.H., Halverson S., Hearty F., Kanodia S.,
Logsdon S.E., McElwain M.W., Ninan J.P., Robertson P., Roy A., Schwab C.,
Terrien R.C.
<Astron. J., 164, 254 (2022)>
=2022AJ....164..254G 2022AJ....164..254G
ADC_Keywords: Stars, G-type; Spectra, optical; Photometry; Radial velocities
Keywords: Asteroseismology ; Exoplanet detection methods ; Radial velocity
; Stellar astronomy ; Stellar oscillations
Abstract:
We report the results of observations of p-mode oscillations in the G0
subgiant star HD35833 in both radial velocities and photometry with
NEID and TESS, respectively. We achieve separate, robust detections of
the oscillation signal with both instruments (radial velocity
amplitude ARV=1.11±0.09m/s, photometric amplitude
Aphot=6.42±0.60ppm, frequency of maximum power
νmax=595.71±17.28µHz, and mode spacing
Δν=36.65±0.96µHz) as well as a nondetection in a TESS
sector concurrent with the NEID observations. These data shed light on
our ability to mitigate the correlated noise impact of oscillations
with radial velocities alone and on the robustness of commonly used
asteroseismic scaling relations. The NEID data are used to validate
models for the attenuation of oscillation signals for exposure times
t<νmax-1, and we compare our results to predictions from
theoretical scaling relations and find that the observed amplitudes
are weaker than expected by >4σ, hinting at gaps in the
underlying physical models.
Description:
Transiting Exoplanet Survey Satellite (TESS) observed the subgiant
star HD35833 during Cycles 1 (Sector 6; 2018 December 11-2019 January
7), 3 (Sector 32; 2020 November 19-2020 December 17), and 4 (Sectors
43, 44, and 45; 2021 September 16-2021 December 2) at a 2-minute
cadence.
We observed HD35833 with the NEID spectrograph on the
Wisconsin-Indiana-Yale-NOIRLab (WIYN) 3.5m telescope at Kitt Peak
National Observatory on the night of 2020 December 12 UT. We observed
the star for 5.5hr at a 2minute cadence (90s exposures), following the
target form near-zenith to airmass=2.0. We observed using the NEID
high resolution (R∼113000) mode, taking simultaneous etalon
calibration frames with the optical density (OD) 1.3 neutral density
filter.
Objects:
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RA (2000) DE Designation(s)
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05 28 09.24 +16 26 20.4 HD 35833 = 2MASS J05280924+1626204
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fig1.dat 23 16289 Section 32 PLD-detrended TESS light curve
fig7.dat 37 164 Detrended NEID RV time series for HD 35833
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See also:
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)
J/A+A/531/A124 : Visibilities of stellar oscillation modes (Ballot+, 2011)
J/A+A/628/A106 : Radial velocity time series of EK Eridani (Bonanno+, 2019)
J/AJ/157/245 : High-precision radial velocities for HD 221416 (Huber+, 2019)
J/AJ/161/130 : List of 100 targets for NEID Earth Twin Survey (Gupta+, 2021)
J/AJ/163/171 : The EXPRES Stellar Signals Project. II. RVel (Zhao+, 2022)
Byte-by-byte Description of file: fig1.dat
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Bytes Format Units Label Explanations
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1- 14 F14.9 d BJD [2174/2200] Barycentric Julian Date; BJD-2457000
16- 23 F8.6 --- Flux [0.99/1.1] Relative flux
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Byte-by-byte Description of file: fig7.dat
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Bytes Format Units Label Explanations
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1- 17 F17.9 d BJD [2459195/2459196] Barycentric Julian Date
19- 24 F6.3 m/s RVel [-5.55/6.72] SERVAL zero point corrected
radial velocity
26- 30 F5.3 m/s e_RVel [0.8/2] Uncertainty in RVel
32- 37 F6.3 m/s DTRVel [-5.19/5.7] Quadratic detrended radial velocity
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 03-Feb-2023