Search Publications
Missions
Journals
Publication Years
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…
Evolution of the dual AGN in Mrk 266: a young AGN and a rotation-dominated disc in the SW nucleus
Stern, Daniel; Comerford, Julia M.; Malkan, Matthew A. +6 more
Dual active galactic nuclei (AGNs) offer a unique opportunity to probe the relationship between supermassive black holes (SMBH) and their host galaxies as well as the role of major mergers in triggering AGN activity. The confirmed dual AGN Mrk 266 has been studied extensively with multiwavelength imaging. Now, high-spatial-resolution IFU spectrosc…
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…
On the dust properties of the UV galaxies in the redshift range z 0.6-1.2
Page, M. J.; Symeonidis, M.; Ferreras, I. +1 more
Far-infrared observations from the Herschel Space Observatory are used to estimate the infrared (IR) properties of ultraviolet-selected galaxies. We stack the PACS (100, 160 $\mu$m) and SPIRE (250, 350, and 500 $\mu$m) maps of the Chandra deep field south (CDFS) on a source list of galaxies selected in the rest-frame ultraviolet (UV) in a redshift…
Resolving Clumpy versus Extended Lyα in Strongly Lensed, High-redshift Lyα Emitters
Shibuya, Takatoshi; Florian, Michael; Sharon, Keren +10 more
We present six strongly gravitationally lensed Lyα emitters (LAEs) at z ∼ 4–5 with Hubble Space Telescope (HST) narrowband imaging isolating Lyα. Through complex radiative transfer Lyα encodes information about the spatial distribution and kinematics of the neutral hydrogen upon which it scatters. We investigate the galaxy properties and Lyα morph…
Latitudinal Asymmetry in the Dayside Atmosphere of WASP-43b
Sing, David K.; Valenti, Jeff A.; Rustamkulov, Zafar +9 more
We present two-dimensional near-infrared temperature maps of the canonical hot Jupiter WASP-43b using a phase-curve observation with JWST NIRSpec/G395H. From the white-light planetary transit, we improve constraints on the planet's orbital parameters and measure a planet-to-star radius ratio of
An Empirical Sample of Spectra of M-type Stars with Homogeneous Atmospheric-parameter Labels
Luo, A. -Li; Kong, Xiao; Li, Yinbi +6 more
The discrepancies between theoretical and observed spectra, and the systematic differences between various spectroscopic parameter estimates, complicate the determination of atmospheric parameters of M-type stars. In this work, we present an empirical sample of 5105 M-type star spectra with homogeneous atmospheric parameter labels through stellar-…
Resolving Twin Jets and Twin Disks with JWST and ALMA: The Young WL 20 Multiple System
Le Gouellec, Valentin J. M.; Ressler, Michael E.; Tychoniec, Łukasz +2 more
We report the discovery of jets emanating from pre-main-sequence objects exclusively at mid-infrared wavelengths, enabled by the superb sensitivity of JWST's Mid-Infrared Instrument Medium-Resolution Spectrometer. These jets are observed only in lines of [Ni II], [Fe II], [Ar II], and [Ne II]. The H2 emission, imaged in eight distinct t…
Effects of the 2007 Martian Global Dust Storm on Boundary Positions in the Induced Magnetosphere
Holmström, Mats; Coates, Andrew J.; Frahm, Rudy A. +8 more
Mars's magnetosphere is a sensitive system, varying due to external and internal factors, such as solar wind conditions and crustal magnetic fields. A signature of this influence can be seen in the position of two boundaries; the bow shock and the induced magnetospheric boundary (IMB). The bow shock moves closer to Mars during times of high solar …