Search Publications
Physical Characterization of Serendipitously Uncovered Millimeter-wave Line-emitting Galaxies at z 2.5 behind the Local Luminous Infrared Galaxy VV 114
Tamura, Yoichi; Kohno, Kotaro; Yun, Min S. +11 more
We present a detailed investigation of millimeter-wave line emitters ALMA J010748.3-173028 (ALMA-J0107a) and ALMA J010747.0-173010 (ALMA-J0107b), which were serendipitously uncovered in the background of the nearby galaxy VV 114 with spectral scan observations at λ = 2-3 mm. Via Atacama Large Millimeter/submillimeter Array (ALMA) detection of CO(4…
ALMA Observations of the Inner Cavity in the Protoplanetary Disk around Sz 84
Dong, Ruobing; Tamura, Motohide; Takami, Michihiro +5 more
We present Atacama Large Millimeter/submillimeter Array observations of a protoplanetary disk around the T Tauri star Sz 84 and analyses of the structures of the inner cavity in the central region of the dust disk. Sz 84's spectral energy distribution (SED) has been known to exhibit negligible infrared excess at λ ≲ 10 µm due to the disk's c…
The Role of Dust, UV Luminosity and Large-scale Environment on the Escape of Lyα Photons: A Case Study of a Protocluster Field at z = 3.1
Dey, Arjun; Lee, Kyoung-Soo; Huang, Yun +3 more
We present a detailed characterization of the Lyα properties for 93 Lyα emitters (LAEs) at z ~ 3.1 selected from the D1 field of the Canada-France-Hawaii Telescope Legacy Survey, including 24 members of a massive protocluster. The median-stacked Lyα image shows an extended Lyα halo (LAH) surrounding the galaxy with the exponential scale length 4.9…
Observational Kinematic Characteristics of Blobs in Solar Coronal Helmet and Pseudo Streamers
Kumar, Pankaj; Cho, Kyung-Suk; Kim, Yeon-Han +4 more
We examine two helmet and two pseudo streamers (HSs and PSs) observed on 2018 and 2019. The HSs (PSs) have dark coronal cavities and stretched loop structures (twin coronal cavities and narrow plasma sheet) at their bases, which are well observed in K-Coronagraph (K-Cor). Their outer-corona structures (top of core, cusp, and stalk) are also clearl…
The Highly Self-absorbed Blazar PKS 1351-018
Frey, Sándor; Chen, Sina; Punsly, Brian +5 more
PKS 1351-018 at a redshift of z = 3.71 is one of the most luminous, steady synchrotron sources with a luminosity >1047 erg s-1. The synchrotron luminosity does not seem to have varied by more than ~25% over 35 yr. In order to appreciate this remarkable behavior, if it were at z = 0.5, it would have a flux density at 15 GHz…
AT 2019qyl in NGC 300: Internal Collisions in the Early Outflow from a Very Fast Nova in a Symbiotic Binary
Boyer, Martha L.; Kilpatrick, Charles D.; Coulter, David A. +39 more
Nova eruptions, thermonuclear explosions on the surfaces of white dwarfs (WDs), are now recognized to be among the most common shock-powered astrophysical transients. We present the early discovery and rapid ultraviolet (UV), optical, and infrared (IR) temporal development of AT 2019qyl, a recent nova in the nearby Sculptor Group galaxy NGC 300. T…
Nonthermal Velocity in the Transition Region of Active Regions and Its Center-to-limb Variation
Tripathi, Durgesh; Ghosh, Avyarthana; Klimchuk, James A.
We derive the nonthermal velocities (NTVs) in the transition region of an active region using the Si IV 1393.78 Å line observed by the Interface Region Imaging Spectrograph and compare them with the line-of-sight photospheric magnetic fields obtained by the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory. The active region…
Optical Properties of Interstellar Dust around the Orion A Molecular Cloud
Dobashi, Kazuhito; Shimoikura, Tomomi; Naoi, Takahiro +2 more
We have studied optical properties of interstellar dust around the Orion A molecular cloud to investigate the size distribution and the composition of dust grains. Orion A is one of the most studied molecular clouds in the solar vicinity (d ≃ 400 pc). In this paper, we used optical and near-infrared photometric data. The optical data were obtained…
Deep Observations of CO and Free-Free Emission in Ultraluminous Infrared QSO IRAS F07599+6508
Kohno, Kotaro; Daddi, Emanuele; Gao, Yu +4 more
Infrared quasi-stellar objects (IR QSOs) are a rare subpopulation selected from ultraluminous infrared galaxies (ULIRGs) and have been regarded as promising candidates of ULIRG-to-optical QSO transition objects. Here we present NOEMA observations of the CO (1-0) line and 3 mm continuum emission in IR QSO IRAS F07599+6508 at z = 0.1486, which has m…
Searching for Surviving Companion in the Young SMC Supernova Remnant 1E 0102.2-7219
Ruiter, Ashley J.; Chu, You-Hua; Li, Chuan-Jui +3 more
1E 0102.2-7219 (hereafter E0102) is a young supernova remnant (SNR) in the Small Magellanic Cloud. It contains oxygen-rich SN ejecta, a possible neutron star (NS), and a small amount of fast-moving H-rich ejecta material. These properties are also seen in Cas A; it has thus been suggested that E0102 is also a Type IIb SNR, whose SN progenitor's hy…