High contrast imaging at ten microns, a search for exoplanets around: Eps Indi A, Eps Eri, Tau Ceti, Sirius A and Sirius B

P. Pathak, D. J. M. Petit dit de la Roche, M. Kasper, M. Sterzik, O. Absil, A. Boehle, F. Feng, V. D. Ivanov, M. Janson, H. R. A. Jones, A. Kaufer, H. -U. Käufl, A. -L. Maire, M. Meyer, E. Pantin, R. Siebenmorgen, M. E. van den Ancker, G. Viswanath

Research output: Contribution to journalArticlepeer-review

27 Downloads (Pure)

Abstract

The direct imaging of rocky exoplanets is one of the major science goals for upcoming large telescopes. The contrast requirement for imaging such planets is challenging. However, the mid-IR (InfraRed) regime provides the optimum contrast to directly detect the thermal signatures of exoplanets in our solar neighbourhood. We aim to exploit novel fast chopping techniques newly developed for astronomy with the aid of adaptive optics to look for thermal signatures of exoplanets around bright stars in the solar neighbourhood. We use the upgraded VISIR (Very Large Telescope Imager and Spectrometer for the mid-InfraRed) instrument with high contrast imaging (HCI) capability optimized for observations at 10~$\mu$m to look for exoplanets around five nearby ($d$ <4 pc) stars. The instrument provides an improved signal-to-noise (S/N) by a factor of $\sim$4 in the N-band compared to standard VISIR for a given S/N and time. In this work we achieve a detection sensitivity of sub-mJy, which is sufficient to detect few Jupiter mass planets in nearby systems. Although no detections are made we achieve most sensitive limits within $
Original languageEnglish
Article numberA121
Number of pages10
JournalAstronomy & Astrophysics
Volume652
DOIs
Publication statusPublished - 18 Aug 2021

Keywords

  • Instrumentation: adaptive optics
  • Planets and satellites: detection

Fingerprint

Dive into the research topics of 'High contrast imaging at ten microns, a search for exoplanets around: Eps Indi A, Eps Eri, Tau Ceti, Sirius A and Sirius B'. Together they form a unique fingerprint.

Cite this