Dabbech, A. Terris, M. Jackson, A. Ramatsoku, M. Smirnov, O. M. Wiaux, Y.
Published in
The Astrophysical Journal Letters
We introduce the first AI-based framework for deep, super-resolution, wide-field radio interferometric imaging and demonstrate it on observations of the ESO 137-006 radio galaxy. The algorithmic framework to solve the inverse problem for image reconstruction builds on a recent “plug-and-play” scheme whereby a denoising operator is injected as an im...
Balakrishnan, Vishnu Freire, Paulo C. C. Ransom, S. M. Ridolfi, Alessandro Barr, E. D. Chen, W. Krishnan, Vivek Venkatraman Champion, D. Kramer, M. Gautam, T.
...
Published in
The Astrophysical Journal Letters
PSR J2140−2311B is a 13 ms pulsar discovered in 2001 in a 7.8 hr Green Bank Telescope observation of the core-collapsed globular cluster M30 and predicted to be in a highly eccentric binary orbit. This pulsar has eluded detection since then; therefore, its precise orbital parameters have remained a mystery until now. In this work, we present the co...
Wang, Yuan-Zhu Li, Yin-Jie Vink, Jorick S. Fan, Yi-Zhong Tang, Shao-Peng Qin, Ying Wei, Da-Ming
Published in
The Astrophysical Journal Letters
The origins of coalescing binary black holes (BBHs) detected by the advanced LIGO/Virgo are still under debate, and clues may be present in the joint mass-spin distribution of these merger events. Here we construct phenomenological models containing two subpopulations to investigate the BBH population detected in gravitational-wave observations. We...
Koss, Michael J. Treister, Ezequiel Kakkad, Darshan Casey-Clyde, J. Andrew Kawamuro, Taiki Williams, Jonathan Foord, Adi Trakhtenbrot, Benny Bauer, Franz E. Privon, George C.
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Published in
The Astrophysical Journal Letters
We present multiwavelength high-spatial resolution (∼0.″1, 70 pc) observations of UGC 4211 at z = 0.03474, a late-stage major galaxy merger at the closest nuclear separation yet found in near-IR imaging (0.″32, ∼230 pc projected separation). Using Hubble Space Telescope/Space Telescope Imaging Spectrograph, Very Large Telescope/MUSE+AO, Keck/OSIRIS...
Hakim, Kaustubh Tian, Meng Bower, Dan J. Heng, Kevin
Published in
The Astrophysical Journal Letters
Carbonate precipitation in oceans is essential for the carbonate-silicate cycle (inorganic carbon cycle) to maintain temperate climates. By considering the thermodynamics of carbonate chemistry, we demonstrate that the ocean pH decreases by approximately 0.5 for a factor of 10 increase in the atmospheric carbon dioxide content. The upper and lower ...
Basak, Soummyadip Sharma, Aditya Kumar Kapadia, Shasvath J. Ajith, Parameswaran
Published in
The Astrophysical Journal Letters
We study the prospects of detecting continuous gravitational waves (CGWs) from spinning neutron stars (NSs), gravitationally lensed by the galactic supermassive black hole. Assuming various astrophysically motivated spatial distributions of galactic NSs, we find that CGW signals from a few (∼0–6) neutron stars should be strongly lensed. Lensing wil...
Ablimit, Iminhaji Podsiadlowski, Philipp Di Stefano, Rosanne Rappaport, Saul A. Wicker, James
Published in
The Astrophysical Journal Letters
Various white-dwarf (WD) binary scenarios have been proposed trying to understand the nature and the diversity of type Ia supernovae (SNe Ia). In this work, we study the evolution of carbon–oxygen WD—red giant (RG) binaries (including the role of magnetic confinement) as possible SN Ia progenitors (the so-called symbiotic progenitor channel). Using...
Abbott, R. Abe, H. Acernese, F. Ackley, K. Adhicary, S. Adhikari, N. Adhikari, R. X. Adkins, V. K. Adya, V. B. Affeldt, C.
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Published in
The Astrophysical Journal Letters
We present the results of a model-based search for continuous gravitational waves from the low-mass X-ray binary Scorpius X-1 using LIGO detector data from the third observing run of Advanced LIGO and Advanced Virgo. This is a semicoherent search that uses details of the signal model to coherently combine data separated by less than a specified coh...
Treu, T. Calabrò, A. Castellano, M. Leethochawalit, N. Merlin, E. Fontana, A. Yang, L. Morishita, T. Trenti, M. Dressler, A.
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Published in
The Astrophysical Journal Letters
Star-forming galaxies can exhibit strong morphological differences between the rest-frame far-UV and optical, reflecting inhomogeneities in star formation and dust attenuation. We exploit deep, high-resolution, NIRCAM seven-band observations to take a first look at the morphology of galaxies in the epoch of reionization (z > 7), and its variation i...
Middei, Riccardo Liodakis, Ioannis Perri, Matteo Puccetti, Simonetta Cavazzuti, Elisabetta Di Gesu, Laura Ehlert, Steven R. Madejski, Grzegorz Marscher, Alan P. Marshall, Herman L.
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Published in
The Astrophysical Journal Letters
Blazars are a class of jet-dominated active galactic nuclei with a typical double-humped spectral energy distribution. It is of common consensus that the synchrotron emission is responsible for the low frequency peak, while the origin of the high frequency hump is still debated. The analysis of X-rays and their polarization can provide a valuable t...
