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The first comprehensive study of a giant nebula around a radio-quiet quasar in the z < 1 Universe
Brinchmann, Jarle; Maseda, Michael V.; Johnson, Sean D. +10 more
We present the first comprehensive study of a giant, ≈70 kpc-scale nebula around a radio-quiet quasar at z < 1. The analysis is based on deep integral field spectroscopy with Multi-Unit Spectroscopic Explorer of the field of HE 0238-1904, a luminous quasar at z = 0.6282. The nebula emits strongly in [O II], $\rm H \beta$, and [O III], and the q…
The δ Scuti stars of the Cep-Her Complex - I. Pulsator fraction, rotation, asteroseismic large spacings, and the νmax relation
Bedding, Timothy R.; Murphy, Simon J.; Mani, Prasad +2 more
We identify delta Scuti (
The TESS-Keck Survey. XII. A Dense 1.8 R ⊕ Ultra-short-period Planet Possibly Clinging to a High-mean-molecular-weight Atmosphere after the First Gigayear
Batalha, Natalie M.; Mayo, Andrew W.; Rice, Malena +39 more
The extreme environments of ultra-short-period planets (USPs) make excellent laboratories to study how exoplanets obtain, lose, retain, and/or regain gaseous atmospheres. We present the confirmation and characterization of the USP TOI-1347 b, a 1.8 ± 0.1 R ⊕ planet on a 0.85 day orbit that was detected with photometry from the TESS miss…
Analysis of BMR Tilt from AutoTAB Catalog: Hinting toward the Thin Flux Tube Model?
Banerjee, Dipankar; Sreedevi, Anu; Jha, Bibhuti Kumar +1 more
One of the intriguing mechanisms of the Sun is the formation of bipolar magnetic regions (BMRs) in the solar convection zone (CZ), which are observed as regions of concentrated magnetic fields of opposite polarity on the photosphere. These BMRs are tilted with respect to the equatorial line, which statistically increases with latitude. The thin fl…
Identifying H I Emission and UV Absorber Associations near the Magellanic Stream
Putman, Mary E.; Zheng, Yong; Kim, Doyeon A.
We present a new technique to identify associations of H I emission in the Magellanic Stream (MS) and ultraviolet (UV) absorbers from 92 QSO sight lines near the MS. We quantify the level of associations of individual H I elements to the main H I body of the Stream using Wasserstein distance-based models, and derive characteristic spatial and kine…
Detection of a 2.85 µm Feature on Five Spinel-rich Asteroids from JWST
Ehlmann, Bethany L.; de Kleer, Katherine; Gomez Barrientos, Jonathan +2 more
Ground-based observations of "Barbarian" L-type asteroids at 1–2.5 µm indicate that their near-infrared spectra are dominated by the mineral spinel, which has been attributed to a high abundance of calcium-aluminum inclusions (CAIs)—the first solids to condense out of the protoplanetary disk during the formation of the solar system. However,…
The Optical to Infrared 0.6–5.3 µm Dust Extinction Law of the Milky Way with JWST NIRSpec: Westerlund 2
Wang, Shu; Chen, Xiaodian
The interstellar extinction law is important for interpreting observations and inferring the properties of interstellar dust grains. Based on the 993 prism/CLEAR spectra from the James Webb Space Telescope (JWST), we investigate the 0.6–5.3 µm interstellar dust extinction law. We propose a pair method to obtain the reddening curves based onl…
The Interplay between the Disk and Corona of the Changing-look Active Galactic Nucleus 1ES 1927+654
Ho, Luis C.; Ricci, Claudio; Trakhtenbrot, Benny +4 more
Time-domain studies of active galactic nuclei (AGNs) offer a powerful tool for understanding black hole accretion physics. Prior to the optical outburst on 2017 December 23, 1ES 1927+654 was classified as a "true" type 2 AGN, an unobscured source intrinsically devoid of broad-line emission in polarized spectra. Through our 3 yr monitoring campaign…
Quasars as standard candles: VI. Spectroscopic validation of the cosmological sample
Marconi, Alessandro; Signorini, Matilde; Risaliti, Guido +6 more
A sample of quasars has been recently assembled to investigate the non-linear relation between their monochromatic luminosities at 2500 Å and 2 keV and to exploit quasars as a new class of 'standardized candles'. The use of this technique for cosmological purposes relies on the non-evolution with redshift of the UV-optical spectral properties of q…
CIRCLEZ : Reliable photometric redshifts for active galactic nuclei computed solely using photometry from Legacy Survey Imaging for DESI
Shirley, R.; Salvato, M.; Buchner, J. +25 more
Context. Photometric redshifts for galaxies hosting an accreting supermassive black hole in their center, known as active galactic nuclei (AGNs), are notoriously challenging. At present, they are most optimally computed via spectral energy distribution (SED) fittings, assuming that deep photometry for many wavelengths is available. However, for AG…