Search Publications
A Complete 16 µm Selected Galaxy Sample at z ∼ 1. II. Morphological Analysis
Cheng, Cheng; Huang, Jia-Sheng; Dai, Y. Sophia +2 more
We present a morphological analysis of the 16 µm flux-density-limited galaxy sample at 0.8 < z < 1.3 from Huang et al. (2021). At the targeted redshift, the 16 µm emission corresponds to the polycyclic aromatic hydrocarbon feature from intense star formation, or dust heated by active galactic nuclei (AGN). Our sample of 479 galax…
Direct Observational Evidence of Multi-epoch Massive Star Formation in G24.47+0.49
Sanhueza, Patricio; Tej, Anandmayee; Hwang, Jihye +19 more
Using new continuum and molecular line data from the Atacama Large Millimeter/submillimeter Array Three-millimeter Observations of Massive Star-forming Regions (ATOMS) survey and archival Very Large Array, 4.86 GHz data, we present direct observational evidence of hierarchical triggering relating three epochs of massive star formation in a ringlik…
Relative Occurrence Rate between Hot and Cold Jupiters as an Indicator to Probe Planet Migration
Fulton, Benjamin J.; Gan, Tianjun; Mao, Shude +4 more
We propose a second-order statistic parameter ɛ, the relative occurrence rate between hot Jupiters (HJs) and cold Jupiters (CJs) (ɛ = η HJ/η CJ), to probe the migration of gas giants. Since the planet occurrence rate is the combined outcome of the formation and migration processes, a joint analysis of HJ and CJ frequency may …
Quasiperiodic Oscillations of Flare Loops and Slipping Motion of Ribbon Substructures during a C-class Flare
Li, Ting; Ye, Jing; Zhang, Yining
Quasiperiodic oscillations in solar-flaring emission have been observed over the past few decades. To date, the underpinning processes resulting in the quasiperiodic oscillations remain unknown. In this paper, we report a unique event that exhibits both the long-duration quasiperiodic intensity oscillations of flare loops and the quasiperiodic sli…
Magnetic Field Alignment Relative to Multiple Tracers in the High-mass Star-forming Region RCW 36
Fissel, Laura M.; Cunningham, Maria; Jones, Paul +9 more
We use polarization data from SOFIA HAWC+ to investigate the interplay between magnetic fields and stellar feedback in altering gas dynamics within the high-mass star-forming region RCW 36, located in Vela C. This region is of particular interest as it has a bipolar H II region powered by a massive star cluster, which may be impacting the surround…
Correlating Intrinsic Stellar Parameters with Mg II Self-reversal Depths
Peacock, Sarah; Redfield, Seth; Youngblood, Allison +2 more
The Mg II h&k emission lines (2803, 2796 Å) are a useful tool for understanding stellar chromospheres and transition regions due to their intrinsic brightness, relatively low interstellar medium (ISM) absorption interference, and abundance of archival spectra available. Similar to other optically thick chromospheric emission lines such as H I Lyα,…
Gone with the Molecular Wind: Photoevaporation in the Compact Dust Disk around CX Tau
Cleeves, L. Ilsedore; Williams, Jonathan P.; Pontoppidan, Klaus M. +5 more
We present Keck NIRSPEC+AO high-resolution (R ∼ 25,000), mid-infrared (M-band: 4.6–5.2 µm) spectra of the protoplanetary disk CX Tau. CX Tau provides an ideal laboratory to study inner disk chemistry in a disk where the signs of radial drift of pebbles are present in the form of a compact mm dust disk and extended gas disk. Our data covers m…
Turbulent Pressure Heats Gas and Suppresses Star Formation in Galactic Bar Molecular Clouds
Meier, David S.; Ginsburg, Adam; Klessen, Ralf S. +6 more
The Central Molecular Zone (CMZ) of the Milky Way is fed by gas inflows from the Galactic disk along almost radial trajectories aligned with the major axis of the Galactic bar. However, despite being fundamental to all processes in the nucleus of the Galaxy, these inflows have been studied significantly less than the CMZ itself. We present observa…
Simultaneous Far-ultraviolet and Near-ultraviolet Observations of T Tauri Stars with UVIT/AstroSat: Probing the Accretion Process in Young Stars
Gorti, Uma; Manoj, P.; Narang, Mayank +4 more
We present results from simultaneous far-ultraviolet (FUV) and near-ultraviolet (NUV) observations of T Tauri stars (TTSs) in the Taurus molecular cloud with UVIT/AstroSat. This is the very first UVIT study of TTSs. From the spectral energy distribution of TTSs from FUV to IR, we show that classical TTSs (CTTSs) emit significantly higher UV excess…
Revealing Potential Initial Mass Function Variations with Metallicity: JWST Observations of Young Open Clusters in a Low-metallicity Environment
Kobayashi, Naoto; Lau, Ryan M.; Izumi, Natsuko +3 more
We present the substellar mass function of star-forming clusters (≃0.1 Myr old) in a low-metallicity environment (≃‑0.7 dex). We performed deep JWST/NIRCam and MIRI imaging of two star-forming clusters in Digel Cloud 2, a star-forming region in the outer Galaxy (R G ≳ 15 kpc). The very high sensitivity and spatial resolution of JWST e…