We present the detection and characterization of TOI-4994b (TIC 277128619b), a warm Saturn-sized planet discovered by the NASA Transiting Exoplanet Survey Satellite. TOI-4994b transits a G-type star (V = 12.6 mag) with a mass, radius, and effective temperature of M ⋆ = 1.00 5 ‑ 0.061 + 0.064 M ⊙ , R ⋆ = 1.05 5 ‑ 0.037 + 0.040 R ⊙ , and T eff = 5640

In recent years, the Mg II h and k lines have become increasingly important for the diagnostics of magnetic fields in the solar chromosphere, motivated both by the advances in the modeling capabilities of their polarization and by the unprecedented spectropolarimetric observations provided by the CLASP missions. In this paper, we investigate the

We present JWST NIRCam imaging targeting 13 z ~ 3 infrared-luminous (L IR ∼ 5 × 10 12L ⊙) galaxies from the ALESS survey with uniquely deep, high-resolution (0 . ″ 08–0 . ″ 16) Atacama Large Millimeter/submillimeter Array 870 μm imaging. The 2.0–4.4 μm (observed frame) NIRCam imaging reveals the rest-frame near-infrared stellar emission in these