Search Publications
B-fields and Dust in Interstellar Filaments Using Dust Polarization (BALLAD-POL). I. The Massive Filament G11.11-0.12 Observed by SOFIA/HAWC+
Diep, Pham Ngoc; Hoang, Thiem; Ngoc, Nguyen Bich +8 more
We report the first measurement of polarized thermal dust emission toward the entire infrared dark cloud G11.11-0.12 taken by the polarimeter SOFIA/HAWC+ at 214 µm. The obtained magnetic fields (B-fields) from the polarized emission of the early-stage and massive filament tend to be perpendicular to its spine. We produce a map of B-field str…
Origin and Extent of the Opacity Challenge for Atmospheric Retrievals of WASP-39 b
de Wit, Julien; Niraula, Prajwal; Gordon, Iouli E. +2 more
As the James Webb Space Telescope (JWST) came online last summer, we entered a new era of astronomy. This new era is supported by data products of unprecedented information content that require novel reduction and analysis techniques. Recently, Niraula et al. (N22) highlighted the need for upgraded opacity models to prevent facing a model-driven a…
Spatial and Binary Parameter Distributions of Black Hole Binaries in the Milky Way Detectable with Gaia
Shikauchi, Minori; Tanikawa, Ataru; Tsuna, Daichi +1 more
Soon after Gaia Data Release 3 (DR3) in 2022 June, some candidates (and one confirmed) of detached black hole (BH)-luminous companion (LC) binaries have been reported. Existing and future detections of astrometric BH-LC binaries will shed light on the spatial distribution of these systems, which can deepen our understanding of the natal kicks and …
The 300 pc Resolution Imaging of a z = 8.31 Galaxy: Turbulent Ionized Gas and Potential Stellar Feedback 600 Million Years after the Big Bang
Inoue, Akio K.; Hashimoto, Takuya; Sugahara, Yuma +16 more
We present the results of 300 pc resolution Atacama Large Millimeter/submillimeter Array imaging of the [O III] 88 µm line and dust continuum emission from a z = 8.312 Lyman-break galaxy MACS0416_Y1. The velocity-integrated [O III] emission has three peaks that are likely associated with three young stellar clumps of MACS0416_Y1, while the c…
Ejecta, Rings, and Dust in SN 1987A with JWST MIRI/MRS
Fox, O. D.; Blommaert, J. A. D. L.; Larsson, J. +31 more
Supernova (SN) 1987A is the nearest supernova in ~400 yr. Using the JWST MIRI Medium Resolution Spectrograph, we spatially resolved the ejecta, equatorial ring (ER), and outer rings in the mid-infrared 12,927 days (35.4 yr) after the explosion. The spectra are rich in line and dust continuum emission, both in the ejecta and the ring. The broad emi…
Magnetic Activity-Rotation-Age-Mass Relations in Late-pre-main-sequence Stars
Garmire, Gordon P.; Feigelson, Eric D.; Getman, Konstantin V.
We study the four-dimensional relationships between magnetic activity, rotation, mass, and age for solar-type stars in the age range 5-25 Myr. This is the late-pre-main-sequence (l-PMS) evolutionary phase when rapid changes in a star's interior may lead to changes in the magnetic dynamo mechanisms. We carefully derive rotational periods and spot s…
Ejecta Evolution Following a Planned Impact into an Asteroid: The First Five Weeks
Bannister, Michele T.; Guillot, Tristan; Abe, Lyu +85 more
The impact of the Double Asteroid Redirection Test spacecraft into Dimorphos, moon of the asteroid Didymos, changed Dimorphos's orbit substantially, largely from the ejection of material. We present results from 12 Earth-based facilities involved in a world-wide campaign to monitor the brightness and morphology of the ejecta in the first 35 days a…
A 3D View of Orion. I. Barnard's Loop
Alves, João; Bally, John; Zucker, Catherine +11 more
Barnard's Loop is a famous arc of Hα emission located in the Orion star-forming region. Here, we provide evidence of a possible formation mechanism for Barnard's Loop and compare our results with recent work suggesting a major feedback event occurred in the region around 6 Myr ago. We present a 3D model of the large-scale Orion region, indicating …
Modeling a Coronal Mass Ejection from an Extended Filament Channel. II. Interplanetary Propagation to 1 au
Scolini, Camilla; Lynch, Benjamin J.; Palmerio, Erika +5 more
We present observations and modeling results of the propagation and impact at Earth of a high-latitude, extended filament channel eruption that commenced on 2015 July 9. The coronal mass ejection (CME) that resulted from the filament eruption was associated with a moderate disturbance at Earth. This event could be classified as a so-called "proble…
A Candidate Relativistic Tidal Disruption Event at 340 Mpc
Chandra, Poonam; Hallinan, Gregg; Laha, Sibasish +13 more
We present observations of an extreme radio flare, VT J024345.70-284040.08, hereafter VT J0243, from the nucleus of a galaxy with evidence for historic Seyfert activity at redshift z = 0.074. Between NRAO Very Large Array (VLA) Sky Survey observations in 1993 to VLA Sky Survey observations in 2018, VT J0243 rose from a ~ GHz radio luminosity of ν …