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Spectroscopy of Free-floating Planetary-mass Objects and Their Disks with JWST

  • Authors: Belinda Damian, Aleks Scholz, Ray Jayawardhana, V. Almendros-Abad, Laura Flagg, Koraljka Mužić, Antonella Natta, Paola Pinilla, Leonardo Testi

Belinda Damian et al 2025 The Astronomical Journal 170 .

  • Provider: AAS Journals

Caption: Figure 3.

Left: map of AV vs. spectral type of one of our targets (CHA1110-7633). The order of templates on the y-axis has no significance and they are only grouped according to their ages. The spectral types prefixed with “Y” and “F” indicate the young dwarfs and old field dwarfs, respectively. The color bar indicates the normalized 1/(χ2)2 value where the lowest χ2 corresponds to the brightest color. The blue colored marker denotes the best-fitting spectral type and AV with an uncertainty of 0.5 spectral subtype and 1 mag in extinction (see text for details). Right: NIRSpec spectra of the same object normalized to the flux at 1.5 μm overplotted with the best-fit template and extinction (blue) resampled to match the target resolution. The templates with ±0.5 subtype and ±1 mag in extinction are shown in different colors for comparison.

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