The β Pictoris b Hill sphere transit campaign: II. Searching for the signatures of the β Pictoris exoplanets through time delay analysis of the δ Scuti pulsations
Article
Article Title | The β Pictoris b Hill sphere transit campaign: II. Searching for the signatures of the β Pictoris exoplanets through time delay analysis of the δ Scuti pulsations |
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ERA Journal ID | 1050 |
Article Category | Article |
Authors | Zieba, Sebastian, Zwintz, Konstanze, Kenworthy, Matthew, Hey, Daniel, Murphy, Simon J., Kuschnig, Rainer, Abe, Lyu, Agabi, Abdelkrim, Mekarnia, Djamel, Guillot, Tristan, Schmider, François-Xavier, Stee, Philippe, De Pra, Yuri, Buttu, Marco, Crouzet, Nicolas, Mellon, Samuel, Bailey III, Jeb, Stuik, Remko, Dorval, Patrick, Talens, Geert Jan, Crawford, Steven, Mamajek, Eric, Laginj, Iva, Ireland, Michael, Lomberg, Blaine, Kuhn, Rudi, Snellen, Ignas, Kalas, Paul, Wang, Jason J., Stevenson, Kevin B., de Mooij, Ernst, Lagrange, Anne-Marie, Lacour, Sylvestre, Nowak, Mathias, Strøm, Paul A., Hu, Zhang and Wang, Lifan |
Journal Title | Astronomy and Astrophysics: a European journal |
Journal Citation | 687 |
Article Number | A309 |
Number of Pages | 16 |
Year | 2024 |
Publisher | EDP Sciences |
Place of Publication | France |
ISSN | 0004-6361 |
1432-0746 | |
Digital Object Identifier (DOI) | https://doi.org/10.1051/0004-6361/202347754 |
Web Address (URL) | https://www.aanda.org/articles/aa/full_html/2024/07/aa47754-23/aa47754-23.html |
Abstract | The β Pictoris system is the closest known stellar system with directly detected gas giant planets, an edge-on circumstellar disc, and evidence of falling sublimating bodies and transiting exocomets. The inner planet, β Pictoris c, has also been indirectly detected with radial velocity (RV) measurements. The star is a known δ Scuti pulsator, and the long-term stability of these pulsations opens up the possibility of indirectly detecting the gas giant planets through time delays of the pulsations due to a varying light travel time. We search for phase shifts in the δ Scuti pulsations consistent with the known planets β Pictoris b and c and carry out an analysis of the stellar pulsations of β Pictoris over a multi-year timescale. We used photometric data collected by the BRITE-Constellation, bRing, ASTEP, and TESS to derive a list of the strongest and most significant δ Scuti pulsations. We carried out an analysis with the open-source python package maelstrom to study the stability of the pulsation modes of β Pictoris in order to determine the long-term trends in the observed pulsations. We did not detect the expected signal for β Pictoris b or β Pictoris c. The expected time delay is 6 s for β Pictoris c and 24 s for β Pictoris b. With simulations, we determined that the photometric noise in all the combined data sets cannot reach the sensitivity needed to detect the expected timing drifts. An analysis of the pulsational modes of β Pictoris using maelstrom showed that the modes themselves drift on the timescale of a year, fundamentally limiting our ability to detect exoplanets around β Pictoris via pulsation timing. |
Keywords | asteroseismology ; methods: observationa; techniques: photometric; planets and satellites: genera; stars: individual: β pictoris; stars: variables: δ Scuti |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Byline Affiliations | Max Planck Institute for Astronomy, Germany |
Leiden University, Netherlands | |
University of Innsbruck, Austria | |
University of Hawaii, United States | |
Centre for Astrophysics | |
University of Graz, Austria | |
Côte d’Azur University, France | |
Italian National Agency for New Technologies Energy and Sustainable Development, Italy | |
French Polar Institute, Antarctica | |
National Institute for Astrophysics, Italy | |
University of Rochester, United States | |
University of California Santa Cruz, United States | |
Uppsala University, Sweden | |
University of Oxford, United Kingdom | |
Space Telescope Science Institute, United States | |
South African Astronomical Observatory, South Africa | |
California Institute of Technology (Caltech), United States | |
Sorbonne University, France | |
Australian National University | |
University of Cape Town, South Africa | |
SETI Institute, United States | |
Northwestern University, United States | |
Foundation for Research and Technology (FORTH), Greece | |
Johns Hopkins Applied Physics Laboratory, United Sates | |
Dublin City University, Ireland | |
Grenoble Alpes University, France | |
European Southern Observatory (ESO), Germany | |
Institute of Astronomy, United Kingdon | |
University of Warwick, United Kingdom | |
Chinese Academy of Sciences, China |
https://research.usq.edu.au/item/z97z9/the-pictoris-b-hill-sphere-transit-campaign-ii-searching-for-the-signatures-of-the-pictoris-exoplanets-through-time-delay-analysis-of-the-scuti-pulsations
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