Search Publications
Missions
Journals
Publication Years
Strong He I Emission Lines in High N/O Galaxies at z ∼ 6 Identified in JWST Spectra: High He/H Abundance Ratios or High Electron Densities?
Ono, Yoshiaki; Ouchi, Masami; Harikane, Yuichi +14 more
We present He I/Hβ flux and He/H abundance ratios in three James Webb Space Telescope galaxies with significant constraints on N/O abundance ratios, GS-NDG-9422, RXCJ2248-ID, and GLASS150008 at z ∼ 6 mostly with the spectroscopic coverage from He I λ4471 and He II λ4686 to He I λ7065, and comparing with 68 local dwarf galaxies. We find that these …
Masses, revised radii, and a third planet candidate in the 'Inverted' planetary system around TOI-1266
Knutson, Heather; Vanderburg, Andrew; López-Morales, Mercedes +40 more
Is the population of close-in planets orbiting M dwarfs sculpted by thermally driven escape or is it a direct outcome of the planet formation process? A number of recent empirical results strongly suggest the latter. However, the unique architecture of the TOI-1266 system presents a challenge to models of planet formation and atmospheric escape gi…
CatNorth: An Improved Gaia DR3 Quasar Candidate Catalog with Pan-STARRS1 and CatWISE
Feng, Xiaotong; Wolf, Christian; Bouwens, R. J. +17 more
A complete and pure sample of quasars with accurate redshifts is crucial for quasar studies and cosmology. In this paper, we present CatNorth, an improved Gaia Data Release 3 (Gaia DR3) quasar candidate catalog with more than 1.5 million sources in the 3π sky built with data from Gaia, Pan-STARRS1, and CatWISE2020. The XGBoost algorithm is used to…
CMZoom. IV. Incipient High-mass Star Formation throughout the Central Molecular Zone
Ho, Luis C.; Ott, Jürgen; Lu, Xing +15 more
In this work, we constrain the star-forming properties of all possible sites of incipient high-mass star formation in the Milky Way's Galactic Center. We identify dense structures using the CMZoom 1.3 mm dust continuum catalog of objects with typical radii of ∼0.1 pc, and measure their association with tracers of high-mass star formation. We incor…
The California Legacy Survey. IV. Lonely, Poor, and Eccentric: A Comparison between Solitary and Neighborly Gas Giants
Knutson, Heather A.; Rosenthal, Lee J.; Fulton, Benjamin J. +1 more
We compare systems with single giant planets to systems with multiple giant planets using a catalog of planets from a high-precision radial velocity survey of FGKM stars. Our comparison focuses on orbital properties, planet masses, and host-star properties. We use hierarchical methods to model the orbital eccentricity distributions of giant single…
Study of the fastest classical nova, V1674 Her: photoionization and morpho-kinemetic model analysis
Dubovsky, Pavol A.; Das, Ramkrishna; Ashok, N. M. +2 more
We present the results of the investigation of the nova V1674 Her (2021), recognized as the swiftest classical nova, with t2 ~ 0.90 d. The distance to the nova is estimated to be 4.97 kpc. The mass and radius of the WD are calculated to be ~1.36 M⊙ and ~0.15 R⊕, respectively. Over the course of 1 month following th…
Evolution of helium triplet transits of close-in gas giants orbiting K dwarfs
Vidotto, Aline A.; Dos Santos, Leonardo A.; Driessen, Florian A. +2 more
Atmospheric escape in exoplanets has traditionally been observed using hydrogen Lyman-α and Hα transmission spectroscopy, but more recent detections have utilized the metastable helium triplet at 1083 nm. Since this feature is accessible from the ground, it offers new possibilities for studying atmospheric escape. Our goal is to understand how the…
Impacts of Bar-driven Shear and Shocks on Star Formation
Park, Myeong-Gu; Fragkoudi, Francesca; van de Ven, Glenn +12 more
Bars drive gas inflow. As the gas flows inward, shocks and shear occur along the bar dust lanes. Such shocks and shear can affect the star formation (SF) and change the gas properties. For four barred galaxies, we present Hα velocity gradient maps that highlight bar-driven shocks and shear using data from the PHANGS-MUSE and PHANGS-ALMA surveys, w…
Retrieval of Thermally Resolved Water Vapor Distributions in Disks Observed with JWST-MIRI
Banzatti, Andrea; Wilner, David J.; Andrews, Sean M. +13 more
The mid-infrared water vapor emission spectrum provides a novel way to characterize the delivery of icy pebbles toward the innermost (<5 au) regions of planet-forming disks. Recently, JWST MIRI-MRS showed that compact disks exhibit an excess of low-energy water vapor emission relative to extended multigapped disks, suggesting that icy pebble dr…
High-resolution APEX/LAsMA 12CO and 13CO (3-2) observation of the G333 giant molecular cloud complex. II. Survival and gravitational collapse of dense gas structures under feedback
Menten, K. M.; Wyrowski, F.; Liu, T. +4 more
Context. Feedback from young massive stars has an important impact on the star formation potential of their parental molecular clouds.
Aims: We investigate the physical properties of gas structures under feedback in the G333 complex using data of the 13CO J = 3-2 line observed with the LAsMA heterodyne camera on the APEX telescope.…