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Connecting photometric and spectroscopic granulation signals with CHEOPS and ESPRESSO
- Source :
- Astronomy & Astrophysics, 670, Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, 2023, 670, ⟨10.1051/0004-6361/202244223⟩, Sulis, S, Lendl, M, Cegla, H M, Rodríguez Díaz, L F, Bigot, L, Van Grootel, V, Bekkelien, A, Cameron, A C, Maxted, P F L, Simon, A E, Lovis, C, Scandariato, G, Bruno, G, Nardiello, D, Bonfanti, A, Fridlund, M, Persson, C M, Salmon, S, Sousa, S G, Wilson, T G, Krenn, A, Hoyer, S, Santerne, A, Ehrenreich, D, Alibert, Y, Alonso, R, Anglada, G, Bárczy, T, Barrado Y Navascues, D, Barros, S C C, Baumjohann, W, Beck, M, Beck, T, Benz, W, Billot, N, Bonfils, X, Borsato, L, Brandeker, A, Broeg, C, Cabrera, J, Charnoz, S, Corral Van Damme, C, Csizmadia, S, Davies, M B, Deleuil, M, Deline, A, Delrez, L, Demangeon, O D S, Demory, B O, Erikson, A, Fortier, A, Fossati, L, Gandolfi, D, Gillon, M, Güdel, M, Heng, K, Isaak, K G, Kiss, L L, Laskar, J, Lecavelier Des Etangs, A, Magrin, D, Munari, M, Nascimbeni, V, Olofsson, G, Ottensamer, R, Pagano, I, Pallé, E, Peter, G, Piotto, G, Pollacco, D, Queloz, D, Ragazzoni, R, Rando, N, Rauer, H, Ribas, I, Rieder, M, Santos, N C, Ségransan, D, Smith, A M S, Steinberger, M, Steller, M, Szabó, G M, Thomas, N, Udry, S, Walton, N A & Wolter, D 2023, ' Connecting photometric and spectroscopic granulation signals with CHEOPS and ESPRESSO ', Astronomy and Astrophysics, vol. 670, A24 . https://doi.org/10.1051/0004-6361/202244223
- Publication Year :
- 2023
- Publisher :
- EDP Sciences, 2023.
-
Abstract
- Context. Stellar granulation generates fluctuations in photometric and spectroscopic data whose properties depend on the stellar type, composition, and evolutionary state. Characterizing granulation is key for understanding stellar atmospheres and detecting planets. Aims. We aim to detect the signatures of stellar granulation, link spectroscopic and photometric signatures of convection for mainsequence stars, and test predictions from 3D hydrodynamic models. Methods. For the first time, we observed two bright stars (Teff = 5833 and 6205 K) with high-precision observations taken simultaneously with CHEOPS and ESPRESSO. We analyzed the properties of the stellar granulation signal in each individual dataset. We compared them to Kepler observations and 3D hydrodynamic models. While isolating the granulation-induced changes by attenuating and filtering the p-mode oscillation signals, we studied the relationship between photometric and spectroscopic observables. Results. The signature of stellar granulation is detected and precisely characterized for the hotter F star in the CHEOPS and ESPRESSO observations. For the cooler G star, we obtain a clear detection in the CHEOPS dataset only. The TESS observations are blind to this stellar signal. Based on CHEOPS observations, we show that the inferred properties of stellar granulation are in agreement with both Kepler observations and hydrodynamic models. Comparing their periodograms, we observe a strong link between spectroscopic and photometric observables. Correlations of this stellar signal in the time domain (flux versus radial velocities, RV) and with specific spectroscopic observables (shape of the cross-correlation functions) are however difficult to isolate due to S/N dependent variations. Conclusions. In the context of the upcoming PLATO mission and the extreme precision RV surveys, a thorough understanding of the properties of the stellar granulation signal is needed. The CHEOPS and ESPRESSO observations pave the way for detailed analyses of this stellar process.<br />Astronomy & Astrophysics, 670<br />ISSN:0004-6361<br />ISSN:1432-0746
- Subjects :
- radial velocities and photometric [Techniques]
FOS: Physical sciences
Sun: granulation
techniques: photometric
stars: atmospheres
techniques: radial velocities
QB Astronomy
atmospheres [Stars]
data analysis [Methods]
QC
Solar and Stellar Astrophysics (astro-ph.SR)
QB
MCC
Earth and Planetary Astrophysics (astro-ph.EP)
radial velocities [Techniques]
photometric [Techniques]
500 Naturwissenschaften und Mathematik::520 Astronomie::520 Astronomie und zugeordnete Wissenschaften
DAS
Astronomy and Astrophysics
methods: data analysis
QC Physics
Astrophysics - Solar and Stellar Astrophysics
Space and Planetary Science
[SDU]Sciences of the Universe [physics]
granulation [Sun]
Astrophysics - Earth and Planetary Astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 00046361 and 14320746
- Database :
- OpenAIRE
- Journal :
- Astronomy & Astrophysics, 670, Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, 2023, 670, ⟨10.1051/0004-6361/202244223⟩, Sulis, S, Lendl, M, Cegla, H M, Rodríguez Díaz, L F, Bigot, L, Van Grootel, V, Bekkelien, A, Cameron, A C, Maxted, P F L, Simon, A E, Lovis, C, Scandariato, G, Bruno, G, Nardiello, D, Bonfanti, A, Fridlund, M, Persson, C M, Salmon, S, Sousa, S G, Wilson, T G, Krenn, A, Hoyer, S, Santerne, A, Ehrenreich, D, Alibert, Y, Alonso, R, Anglada, G, Bárczy, T, Barrado Y Navascues, D, Barros, S C C, Baumjohann, W, Beck, M, Beck, T, Benz, W, Billot, N, Bonfils, X, Borsato, L, Brandeker, A, Broeg, C, Cabrera, J, Charnoz, S, Corral Van Damme, C, Csizmadia, S, Davies, M B, Deleuil, M, Deline, A, Delrez, L, Demangeon, O D S, Demory, B O, Erikson, A, Fortier, A, Fossati, L, Gandolfi, D, Gillon, M, Güdel, M, Heng, K, Isaak, K G, Kiss, L L, Laskar, J, Lecavelier Des Etangs, A, Magrin, D, Munari, M, Nascimbeni, V, Olofsson, G, Ottensamer, R, Pagano, I, Pallé, E, Peter, G, Piotto, G, Pollacco, D, Queloz, D, Ragazzoni, R, Rando, N, Rauer, H, Ribas, I, Rieder, M, Santos, N C, Ségransan, D, Smith, A M S, Steinberger, M, Steller, M, Szabó, G M, Thomas, N, Udry, S, Walton, N A & Wolter, D 2023, ' Connecting photometric and spectroscopic granulation signals with CHEOPS and ESPRESSO ', Astronomy and Astrophysics, vol. 670, A24 . https://doi.org/10.1051/0004-6361/202244223
- Accession number :
- edsair.doi.dedup.....fa06384592b4140ef9abb698917ea0e6