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JWST COMPASS: The 3–5 µm Transmission Spectrum of the Super-Earth L 98-59 c
Batalha, Natalie M.; Moran, Sarah E.; Kirk, James +14 more
We present a JWST Near-InfraRed Spectrograph (NIRSpec) transmission spectrum of the super-Earth exoplanet L 98-59 c. This small (R p = 1.385 ± 0.085R ⊕, M p = 2.22 ± 0.26 R ⊕), warm (T eq = 553 K) planet resides in a multiplanet system around a nearby, bright (J = 7.933) M3V star. We find …
Determining stellar accretion rates from Paα and Brβ emission lines with JWST NIRSpec. Accretion of pre-main-sequence stars in NGC 3603
de Marchi, Guido; Brandl, Bernhard; Rogers, Ciarán
In this Letter, we present the first systematic spectroscopic measurements of the near-infrared (NIR) hydrogen recombination lines Paschen alpha (Paαλ = 1.875 µm) and Brackett beta (Brβλ = 2.626 µm), produced by pre-main-sequence (PMS) stars. Such stars include T Tauri and Herbig AeBe stars, located in the massive…
Clues to growth and disruption of two neighbouring spiral arms of the Milky Way
Matsunaga, Noriyuki; Kawata, Daisuke; Taniguchi, Daisuke +3 more
Studying the nature of spiral arms is essential for understanding the formation of the intricate disc structure of the Milky Way. The European Space Agency's Gaia mission has provided revolutionary observational data that have uncovered detailed kinematical features of stars in the Milky Way. However, so far the nature of spiral arms continues to …
Exploring the Gas-phase Metallicity Gradients of Star-forming Galaxies at Cosmic Noon
Cleri, Nikko J.; Giavalisco, Mauro; Ji, Zhiyuan +3 more
We explore the relationships between the [O/H] gas-phase metallicity radial gradients and multiple galaxy properties for 238 star-forming galaxies at 0.6 < z < 2.6 selected from the CANDELS Lyα Emission at Reionization survey with stellar mass $8.5\lt \mathrm{log}\,{M}_{* }/{M}_{\odot }\lt 10.5$ . The gradients cover the range from ‑0.11 to …
CHEX-MATE: A LOFAR pilot X-ray - radio study on five radio halo clusters
Brunetti, G.; Pointecouteau, E.; Pratt, G. W. +24 more
The connection between the thermal and non-thermal properties in galaxy clusters hosting radio halos seems fairly well established. However, a comprehensive analysis of such a connection has only been done for integrated quantities (e.g. LX − Pradio relation). In recent years, new-generation radio telescopes have enabled the …
VaTEST III: Validation of eight potential super-earths from TESS data
Barclay, Thomas; Tan, Thiam-Guan; Schlieder, Joshua E. +39 more
NASA's all-sky survey mission, the Transiting Exoplanet Survey Satellite (TESS), is specifically engineered to detect exoplanets that transit bright stars. Thus far, TESS has successfully identified approximately 400 transiting exoplanets, in addition to roughly 6 000 candidate exoplanets pending confirmation. In this study, we present the results…
The Massive and Distant Clusters of WISE Survey 2: Equatorial First Data Release
Connor, Thomas; Gonzalez, Anthony H.; Stanford, S. A. +7 more
The Massive and Distant Clusters of WISE Survey 2 (MaDCoWS2) is a new survey designed as the successor of the original MaDCoWS survey. MaDCoWS2 improves upon its predecessor by using deeper optical and infrared data and a more powerful detection algorithm (PZWav). As input to the search, we use grz photometry from the DECam Legacy Survey (DECaLS) …
Localizing Quasiperiodic Pulsations in Hard X-Ray, Microwave, and Lyα Emissions of an X6.4 Flare
Su, Yang; Li, Dong; Hong, Zhenxiang +1 more
We report the simultaneous observations of quasiperiodic pulsations (QPPs) in wavelengths of hard X-ray (HXR), microwave, Lyα, and ultraviolet (UV) emissions during the impulsive phase of an X6.4 flare on 2024 February 22 (SOL2024-02-22T22:08). The X6.4 flare shows three repetitive and successive pulsations in HXR and microwave wavebands, and they…
Imprints of the Local Bubble and Dust Complexity on Polarized Dust Emission
Tahani, Mehrnoosh; Clark, S. E.; Halal, George
Using 3D dust maps and Planck polarized dust emission data, we investigate the influence of the 3D geometry of the nearby interstellar medium (ISM) on the statistics of the dust polarization on large (
Measuring Tracers of Planet Formation in the Atmosphere of WASP-77A b: Substellar O/H and C/H Ratios, with a Stellar C/O Ratio and a Potentially Superstellar Ti/H Ratio
Changeat, Quentin; Edwards, Billy
We present a comprehensive atmospheric retrieval study of the hot Jupiter WASP-77A b using eclipse observations from the Hubble Space Telescope (HST) and JWST. Using atmospheric retrievals, the spectral features of H2O, CO, and TiO are identified, with volume mixing ratios estimated at log10(VMR) = ‑4.40 ${}_{-0.11}^{+0.14}$ …