Jiang, Ji-an Maeda, Keiichi Kawabata, Miho Doi, Mamoru Shigeyama, Toshikazu Tanaka, Masaomi Tominaga, Nozomu Nomoto, Ken’ichi Niino, Yuu Sako, Shigeyuki
...
Published in
The Astrophysical Journal Letters
In this Letter we report a discovery of a prominent flash of a peculiar overluminous Type Ia supernova, SN 2020hvf, in about 5 hr of the supernova explosion by the first wide-field mosaic CMOS sensor imager, the Tomo-e Gozen Camera. The fast evolution of the early flash was captured by intensive intranight observations via the Tomo-e Gozen high-cad...
Doi, Yasuo Tomisaka, Kohji Hasegawa, Tetsuo Coudé, Simon Arzoumanian, Doris Bastien, Pierre Matsumura, Masafumi Tahani, Mehrnoosh Sadavoy, Sarah Hull, Charles L. H.
...
Published in
The Astrophysical Journal Letters
We investigate the internal 3D magnetic structure of dense interstellar filaments within NGC 1333 using polarization data at 850 μm from the B-fields In STar-forming Region Observations survey at the James Clerk Maxwell Telescope. Theoretical models predict that the magnetic field lines in a filament will tend to be dragged radially inward (i.e., p...
Janquart, Justin Seo, Eungwang Hannuksela, Otto A. Li, Tjonnie G. F. Van Den Broeck, Chris
Published in
The Astrophysical Journal Letters
Similarly to light, gravitational waves can be gravitationally lensed as they propagate near massive astrophysical objects such as galaxies, stars, or black holes. In recent years, forecasts have suggested a reasonable chance of strong gravitational-wave lensing detections with the LIGO–Virgo–KAGRA detector network at design sensitivity. As a conse...
Kilic, Mukremin Kosakowski, Alekzander Moss, Adam G. Bergeron, P. Conly, Annamarie A.
Published in
The Astrophysical Journal Letters
We report the discovery of an isolated white dwarf with a spin period of 70 s. We obtained high-speed photometry of three ultramassive white dwarfs within 100 pc and discovered significant variability in one. SDSS J221141.80+113604.4 is a 1.27 M ⊙ (assuming a CO core) magnetic white dwarf that shows 2.9% brightness variations in the BG40 filter wit...
Moriwaki, Kana Yoshida, Naoki
Published in
The Astrophysical Journal Letters
Line-intensity mapping is emerging as a novel method that can measure the collective intensity fluctuations of atomic/molecular line emission from distant galaxies. Several observational programs with various wavelengths are ongoing and planned, but there remains a critical problem of line confusion; emission lines originating from galaxies at diff...
Fragione, Giacomo
Published in
The Astrophysical Journal Letters
The promise by the LIGO/Virgo/Kagra (LVK) collaboration to detect black-hole–neutron-star (BH–NS) mergers via gravitational wave (GW) emission has recently been fulfilled with the detection of GW200105 and GW200115. Mergers of BH–NS binaries are particularly exciting for their multimessenger potential since GW detection can be followed by an electr...
Nagasawa, Takumi Sato, Reo Hasegawa, Takeshi Numadate, Naoki Shioya, Nobutaka Shimoaka, Takafumi Hasegawa, Takeshi Hama, Tetsuya
Published in
The Astrophysical Journal Letters
The absolute absorption cross section of dangling OH bonds in water ice, a free OH stretch mode by three-coordinated surface water molecules, is derived experimentally as 1.0 ± 0.2 × 10−18 cm2 at 3696 cm−1 for amorphous water at 90 K using infrared multiple-angle incidence resolution spectrometry (IR–MAIRS). The integrated absorption cross section ...
Hu, Z. W. Winarski, R. P.
Published in
The Astrophysical Journal Letters
Planets are known to grow out of a star-encircling disk of the gas and dust inherited from an interstellar cloud; their formation is thought to begin with coagulation of submicron dust grains into aggregates, the first foundational stage of planet formation. However, with nanoscale and submicron solids unobservable directly in the interstellar medi...
Bardalez Gagliuffi, Daniella C. Faherty, Jacqueline K. Li, Yiting Brandt, Timothy D. Williams, Lauryn Brandt, G. Mirek Gelino, Christopher R.
Published in
The Astrophysical Journal Letters
In this Letter, we measure the full orbital architecture of the two-planet system around the nearby K0 dwarf 14 Herculis. 14 Her (HD 145675, HIP 79248) is a middle-aged ( 4.6−1.3+3.8 Gyr) K0 star with two eccentric giant planets identified in the literature from radial velocity (RV) variability and long-term trends. Using archival RV data from Keck...
Wang, H. Z. Xiao, C. Shi, Q. Q. Guo, R. L. Yue, C. Xie, L. H. Zhang, J. Zhang, A. B. Wieser, M. Saito, Y.
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Published in
The Astrophysical Journal Letters
The Advanced Small Analyzer for Neutrals (ASAN) on board the Chang’E-4 Yutu-2 rover first detected energetic neutral atoms (ENAs) originating from the lunar surface at various lunar local times on the lunar farside. In this work, we examine the ENA energy spectra, obtained in the first 23 lunar days from 2019 January 11 to 2020 October 12, and find...
