Exoplanets, -moons, -comets

The SPHERE Infrared Survey For Exoplanets (SHINE) V. Full Sample Characterization

By Keith Cowing

Status Report

astro-ph.EP

May 29, 2026

Filed under astro-ph.EP, astrogeology, exoplanet, imaging, SHINE, Spectroscopy, SPHERE, Stellar Cartography

The SPHERE Infrared Survey For Exoplanets (SHINE) V. Full Sample Characterization — Completeness of our GaiaPMEX search for binaries. Each panel represents one of the GaiaPMEX references. The shaded area shows the completeness of the combined RUWE+PMa signal, with the dotted blue line and the dashed red line indicating the 50% contour level given by RUWE and PMa alone, respectively. Overplotted are SHINE detections, each assigned to the closest reference star to its target. Squares indicate stars with no RUWE and PMa measurements; triangles represent stars without PMa; dots indicate stars with both RUWE and PMa. The companions are colored according to their detection method: red (DI), gold (RV), green (GaiaNSS), black (GaiaPMEX); those also detected by GaiaPMEX have a black edge. Finally, violet markers indicate companions, only detected by GaiaPMEX, with a minimum mass in the substellar regime. — astro-ph.EP

Surveys of large stellar samples are the prime means through which the prevalence of exoplanets can be derived, and crucial constraints to planet formation models can be set.

Direct imaging (DI) is ideally positioned to probe the outer regions (5-300au) of planetary systems, providing complementary information to techniques such as transits and radial velocities.

We present the full sample of the SpHere INfrared survey for Exoplanets (SHINE), the second largest DI campaign to date. SHINE observed 460 stars between 2015 and 2023 thanks to the Guaranteed Time Observations (GTO) allocated by ESO to the SPHERE consortium at VLT.

The goal of this paper is to homogeneously derive the stellar properties of the targets and to define a subsample of young single hosts to be used as a starting point for the final statistical analysis of the survey.

Stellar ages were determined based on kinematic indicators (such as the membership to young moving groups), age diagnostics (lithium abundance, rotation, activity), and isochrone fitting. A thorough vetting for binarity was undertaken combining astrometric, spectroscopic, and imaging data.

A subsample of 333 stars, covering a large extent of stellar ages and masses, was constructed. Selection criteria, global features, as well as the properties of individual stars are reported and discussed.

V. Squicciarini, S. Desidera, G. Chauvin, F. Kiefer, V. D’Orazi, C. Fontanive, A. Vigan, D. Nardiello, S. Messina, D. Albert, S. Bergeon, J.-L. Beuzit, B. Biller, A. Boccaletti, M. Bonavita, M. Bonnefoy, W. Brandner, F. Cantalloube, A. Cheetham, P. Delorme, C. Dominik, M. Feldt, R. Galicher, R. Gratton, J. Hagelberg, Th. Henning, M. Janson, E. Lagadec, A.-M. Lagrange, M. Langlois, C. Lazzoni, H. Le Coroller, R. Ligi, A.-L. Maire, G.-D. Marleau, F. Ménard, D. Mesa, N. Meunier, M. Meyer, C. Mordasini, C. Moutou, A. Müller, C. Perrot, M. Samland, H. M. Schmid, T. Schmidt, E. Sissa, M. Turatto, S. Udry, A. Zurlo, L. Abe, J. Antichi, A. Baruffolo, P. Baudoz, J. Baudrand, A. Bazzon, P. Blanchard, A. J. Bohn, M. Carbillet, M. Carle, E. Cascone, J. Charton, R. Claudi, A. Costille, V. De Caprio, A. Delboulbé, K. Dohlen, N. Engler, D. Fantinel, P. Feautrier, T. Fusco, P. Gigan, J. H. Girard, E. Giro, D. Gisler, L. Glück, C. Gry, N. Hubin, E. Hugot, M. Jaquet, M. Kasper, D. Le Mignant, M. Llored, F. Madec, Y. Magnard, P. Martínez, D. Maurel, O. Möller-Nilsson, D. Mouillet, T. Moulin, A. Origné, A. Pavlov, D. Perret, C. Petit, J. Pragt, P. Puget, P. Rabou, J. Ramos, F. Rigal, S. Rochat et al. (12 additional authors not shown)

Comments: 70 pages, 5 figures, 8 tables. Accepted for publication in A&A
Subjects: Earth and Planetary Astrophysics (astro-ph.EP); Instrumentation and Methods for Astrophysics (astro-ph.IM)
Cite as: arXiv:2605.27247 [astro-ph.EP] (or arXiv:2605.27247v1 [astro-ph.EP] for this version)
https://doi.org/10.48550/arXiv.2605.27247
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Submission history
From: Vito Squicciarini
[v1] Tue, 26 May 2026 16:26:00 UTC (2,094 KB)
https://arxiv.org/abs/2605.27247

Astrobiology, exoplanet,

Keith Cowing

Biologist, Explorers Club Fellow, ex-NASA Space Biologist and Payload integrator, Editor of NASAWatch.com and Astrobiology.com, Lapsed climber, Explorer, Synaesthete, Former Challenger Center board member 🖖🏻

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