Seo, Eungwang Hannuksela, Otto A. Li, Tjonnie G. F.
Published in
The Astrophysical Journal
Microlensing imprints by typical stellar-mass lenses on gravitational waves are challenging to identify in the LIGO–Virgo frequency band because such effects are weak. However, stellar-mass lenses are generally embedded in lens galaxies such that strong lensing accompanies microlensing. Therefore, events that are strongly lensed in addition to bein...
Eftekhari, T. Fong, W. Gordon, A. C. Sridhar, N. Kilpatrick, C. D. Bhandari, S. Deller, A. T. 董, 雨 欣 Rouco Escorial, A. Heintz, K. E.
...
Published in
The Astrophysical Journal
We present the first X-ray census of fast radio burst (FRB) host galaxies to conduct the deepest search for active galactic nuclei (AGN) and X-ray counterparts to date. Our sample includes seven well-localized FRBs with unambiguous host associations and existing deep Chandra observations, including two events for which we present new observations. ...
Sellwood, J. A. Carlberg, R. G.
Published in
The Astrophysical Journal
The problem of how some disk galaxies avoid forming bars remains unsolved. Many galaxy models having reasonable properties continue to manifest vigorous instabilities that rapidly form strong bars and no widely accepted idea has yet been advanced to account for how some disk galaxies manage to avoid this instability. It is encouraging that not all ...
金, 刈非 Sutherland, Ralph Kewley, Lisa J. Nicholls, David C.
Published in
The Astrophysical Journal
Photoionization models frequently assume constant temperature or density within H ii regions. We investigate this assumption by measuring the detailed temperature and density structures of four H ii regions in the Large Magellanic Cloud and the Small Magellanic Cloud, using integral-field spectroscopic data from the Wide-Field Spectrograph on the A...
刘, 畅 Miller, Adam A. Boos, Samuel J. Shen, Ken J. Townsley, Dean M. Schulze, Steve Harvey, Luke Maguire, Kate Johansson, Joel Brink, Thomas G.
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Published in
The Astrophysical Journal
We present observations of SN 2022joj, a peculiar Type Ia supernova discovered by the Zwicky Transient Facility. SN 2022joj exhibits an unusually red g ZTF − r ZTF color at early times and a rapid blueward evolution afterward. Around maximum brightness, SN 2022joj shows a high luminosity ( MgZTF,max≃−19.7 mag), a blue broadband color (g ZTF − r ZTF...
Li, Zhaosheng Kuiper, Lucien Ge, Mingyu Falanga, Maurizio Poutanen, Juri Ji, Long Pan, Yuanyue Huang, Yue Xu, Renxin Song, Liming
...
Published in
The Astrophysical Journal
We studied the broadband X-ray timing and spectral behaviors of the newly confirmed accreting millisecond X-ray pulsar MAXI J1816−195 during its 2022 outburst. We used data from the Insight-HXMT Medium Energy (ME) and High Energy (HE) telescopes, NICER, and NuSTAR that cover the energy range between 0.8 and 210 keV. A coherent timing analysis of so...
Appleby, Stephen Tonegawa, Motonari Park, Changbom Hong, Sungwook E. Kim, Juhan Yoon, Yongmin
Published in
The Astrophysical Journal
We extract the galaxy density and momentum power spectra from a subset of early-type galaxies in the Sloan Digital Sky Survey (SDSS) DR7 main galaxy catalog. Using galaxy distance information inferred from the improved fundamental plane described in Yoon and Park, we reconstruct the peculiar velocities of the galaxies and generate number density an...
Siebert, Matthew R. Foley, Ryan J. Zenati, Yossef Dimitriadis, Georgios Schmidt, Eva Yang, Grace Davis, Kyle W. Taggart, Kirsty Rojas-Bravo, César
Published in
The Astrophysical Journal
We present nebular spectroscopy of SN 2020hvf, a Type Ia supernova (SN Ia) with an early bump in its light curve. SN 2020hvf shares many spectroscopic and photometric similarities to the carbon-rich high-luminosity “03fg-like” SNe Ia. At >240 days after peak brightness, we detect unambiguous emission from [Ca ii] λ λ7291, 7324, which is rarely obse...
Liu, Meizhu Qin, Sheng-Li Liu, Tie Tang, Mengyao Liu, Sheng-Yuan Chen, Li Li, ChuanShou Shi, HongQiong Li, Xiaohu Zhang, Tianwei
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Published in
The Astrophysical Journal
We present Atacama Large Millimeter/submillimeter Array subarcsecond-resolution observations of both continuum and molecular lines at 345 GHz toward the massive star-forming region IRAS 16351-4722 (hereafter I16351). A total of 12 dust cores were detected based on high-spatial-resolution observations of the continuum. Among them, a high-mass core (...
Raphaldini, Breno Dikpati, Mausumi Norton, Aimee A. Teruya, Andre S. W. McIntosh, Scott W. Prior, Christopher B. MacTaggart, David
Published in
The Astrophysical Journal
We investigate whether global toroid patterns and the local magnetic field topology of solar active region (AR) 12673 together can hindcast the occurrence of the biggest X-flares of solar cycle (SC)-24. Magnetic toroid patterns (narrow latitude belts warped in longitude, in which ARs are tightly bound) derived from the surface distributions of ARs,...
