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Direct Imaging Explorations for Companions around Mid–Late M Stars from the Subaru/IRD Strategic Program 

  • Authors: Taichi Uyama, Charles Beichman, Masayuki Kuzuhara, Markus Janson, Takayuki Kotani, Dimitri Mawet, Bun'ei Sato, Motohide Tamura, Hiroyuki Tako Ishikawa, Bryson Cale, Thayne Currie, Hiroki Harakawa, Thomas Henning, Teruyuki Hirano, Klaus Hodapp, Yasunori Hori, Masato Ishizuka, Shane Jacobson, Yui Kasagi, Eiichiro Kokubo, Mihoko Konishi, Tomoyuki Kudo, Takashi Kurokawa, Nobuhiko Kusakabe, Jungmi Kwon, Masahiro Machida, Takao Nakagawa, Norio Narita, Jun Nishikawa, Masahiro Ogihara, Masashi Omiya, Takuma Serizawa, Akitoshi Ueda, Sébastien Vievard, Ji Wang

Taichi Uyama et al 2023 The Astronomical Journal 165 .

  • Provider: AAS Journals

Caption: Figure 6.

Color–magnitude diagram of the detected companion candidates (we expediently add a suffix of “B” of the primary star “A”) overlaid with photometric libraries of field low-mass stars/substellar-mass objects (Dupuy & Liu 2012; Dupuy & Kraus 2013), as well as BT-Settl isochrones (blue solid: 1 Gyr; dashed: 5 Gyr; and dotted: 10 Gyr; Allard et al. 2012) and blackbody radiation (gray dashed line). We corrected the Keck/NIRC2 magnitudes into MKO/NSFCam filters to compare with the libraries using species (Stolker et al. 2020). We also added the expected ﹩L^{\prime} ﹩-band absolute magnitudes of the background stars around LSPM J1922+0702 (bgs1 and bgs2) assuming the same distance as the target star in the left panel. The right panel shows the zoomed-in diagram without the background stars.

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