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Worlds Next Door: A Candidate Giant Planet Imaged in the Habitable Zone of α Centauri A. I. Observations, Orbital and Physical Properties, and Exozodi Upper Limits

Authors: Charles Beichman, Aniket Sanghi, Dimitri Mawet, Pierre Kervella, Kevin Wagner, Billy Quarles, Jack J. Lissauer, Max Sommer, Mark Wyatt, Nicolas Godoy, William O. Balmer, Laurent Pueyo, Jorge Llop-Sayson, Jonathan Aguilar, Rachel Akeson, Ruslan Belikov, Anthony Boccaletti, Elodie Choquet, Edward Fomalont, Thomas Henning, Dean Hines, Renyu Hu, Pierre-Olivier Lagage, Jarron Leisenring, James Mang, Michael Ressler, Eugene Serabyn, Pascal Tremblin, Marie Ygouf, Mantas Zilinskas

Charles Beichman et al 2025 The Astrophysical Journal Letters 989 .

Provider: AAS Journals

Caption: Figure 4.

Limits from archival imaging at S1’s position. The solid, color-coded lines show a photospheric model for an M0III star (T_eff = 3800 K) reddened by increasing levels of extinction, all normalized to 3.5 mJy at 15.5 μm (red star). The blue star denotes the flux density of the object denoted C1 detected by the VLT/NEAR experiment (K. Wagner et al. 2021). The dashed lines show the SED of a typical starburst galaxy or ULIRG (Arp 220) similarly reddened. Upper limits at the position of S1 come from observations at earlier epochs with Spitzer/IRAC (3–8 μm), 2MASS, and NACO (P. Kervella et al. 2016).

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