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81
Detecting and Characterizing Young Quasars. I. Systemic Redshifts and Proximity Zone Measurements
Published 2022“…We combine submillimeter observations from the Atacama Large Millimetre Array and the NOrthern Extended Millimeter Array, as well as deep optical and near-infrared spectra from the medium-resolution spectrograph on the Very Large Telescope and on the Keck telescopes, in order to identify and characterize these new young quasars, which provide valuable clues about the accretion behavior of supermassive black holes in the early universe and pose challenges on current black hole formation models to explain the rapid formation of billion-solar-mass black holes. We measure the quasars' systemic redshifts, black hole masses, Eddington ratios, emission-line luminosities, and star formation rates of their host galaxies. …”
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82
Planetesimals around stars with TESS (PAST) – I. Transient dimming of a binary solar analogue at the end of the planet accretion era
Published 2021“…© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society We report detection of quasi-periodic (1.5-d) dimming of HD 240779, the solar-mass primary in a 5 arcsec visual binary (also TIC 284730577), by the Transiting Exoplanet Survey Satellite. …”
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83
15-GHz radio emission from nearby low-luminosity active galactic nuclei
Published 2018“…Compact, parsec-scale radio emission has been detected above a flux density of 40 μ Jy in 60% (45 of 76) of the LLAGN sample.We detect 20 out of 31 (64%) low-ionization nuclear emission-line region (LINER) nuclei, ten out of 14 (71%) low-luminosity Seyfert galaxies, and 15 out of 31 (48%) transition objects.We use this sample to explore correlations between different emission lines and the radio luminosity.We also populate the X-ray and the optical fundamental plane of black hole activity and further refine its parameters.We obtain a fundamental plane relation of log LR = 0.48 (±0.04) log LX + 0.79 (±0.03) log M and an optical fundamental plane relation of log LR = 0.63 (±0.05) log L[O III] + 0.67 (±0.03) log M after including all the LLAGN detected at high resolution at 15 GHz, and the best-studied hard-state X-ray binaries (luminosities are given in erg s^-1 while the masses are in units of solar mass). Finally, we find conclusive evidence that the nuclear 15 GHz radio luminosity function (RLF) of all the detected Palomar Sample LLAGN has a turnover at the low-luminosity end, and is best-fitted with a broken power law. …”
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84
LMXB and IMXB Evolution: I. The Binary Radio Pulsar PSR J1614-2230
Published 2011“…This first application of the results is aimed at an understanding of the newly discovered pulsar PSR J1614-2230 which has a 1.97 solar masses neutron star, orbital period = 8.7 days, and a companion star of 0.5 solar mass. …”
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85
Global 3D Radiation Magnetohydrodynamic Simulations of Accretion onto a Stellar-mass Black Hole at Sub- and Near-critical Accretion Rates
Published 2023-01-01“…We present global 3D radiation magnetohydrodynamic simulations of accretion onto a 6.62 solar-mass black hole, with quasi-steady-state accretion rates reaching 0.016–0.9 times the critical accretion rate, which is defined as the accretion rate for powering the Eddington luminosity, assuming a 10% radiative efficiency, in three different runs. …”
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86
SMEI direct, 3-D-reconstruction sky maps, and volumetric analyses, and their comparison with SOHO and STEREO observations
Published 2009-11-01“…In this paper we present the results of the analysis of the late January 2007 Coronal Mass Ejection (CME) events recorded by the Solar Mass Ejection Imager (SMEI), the Solar TErrestrial RElations Observatory (STEREO), and the SOlar and Heliospheric Observatory (SOHO) spacecraft. …”
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87
Magnetic Activity–Rotation–Age–Mass Relations in Late-pre-main-sequence Stars
Published 2023-01-01“…Both X-ray luminosity and starspot area decrease approximately as t ^−1 for solar-mass stars, suggesting that spot magnetic fields are roughly constant and l-PMS stars follow the universal solar-scaling law between the X-ray luminosity and surface magnetic flux. …”
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88
Localization and Lensing of Fast Radio Bursts using CHIME/FRB and its VLBI Outriggers
Published 2023“…I also develop a new way to use FRBs as probes of sub-solar mass primordial black holes. By exploiting multi-path interference in gravitational lensing, I conducted a novel search for lensed FRBs. …”
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Thesis -
89
The Equation of State of Nuclear Matter: From Finite Nuclei to Neutron Stars
Published 2020-08-01“…In particular, we explore how the tidal deformability of a 1.4 solar mass neutron star, <inline-formula><math display="inline"><semantics><msub><mi>M</mi><mrow><mn>1.4</mn></mrow></msub></semantics></math></inline-formula>, and the neutron-skin thickness of <inline-formula><math display="inline"><semantics><msup><mrow></mrow><mn>48</mn></msup></semantics></math></inline-formula>Ca and <inline-formula><math display="inline"><semantics><msup><mrow></mrow><mn>208</mn></msup></semantics></math></inline-formula>Pb are related to the stellar radius and the stiffness of the symmetry energy. …”
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90
Iterative Tomography: A Key to Providing Time-Dependent 3-D Reconstructions of the Inner Heliosphere and the Unification of Space Weather Forecasting Techniques
Published 2020-11-01“…In addition, we also plan to resurrect the Solar Mass Ejection Imager Thomson-scattering analysis as a basis for 3-D analysis to be used by the latest NASA Small Explorer heliospheric imagers of the Polarimeter to Unify the Corona and Heliosphere mission, the All Sky Heliospheric Imager, and other modern wide-field imagers. …”
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91
The High-energy Spectrum of the Young Planet Host V1298 Tau
Published 2023-01-01“…We conclude by using the V1298 Tau spectrum as a benchmark for the activity saturation stage of high-energy radiation from solar-mass stars to compare the lifetime cumulative high-energy irradiation of the V1298 Tau planets to other planets orbiting similarly massive stars.…”
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92
The Magellan M2FS Spectroscopic Survey of High-redshift Galaxies: The Brightest Lyman-break Galaxies at z ∼ 6
Published 2024-01-01“…They also have high star formation rates ranging from a few tens to a few hundreds of solar mass per year. Five of the LBGs have JWST or HST images, and four of them show compact morphology in these images, including one that is roughly consistent with a point source, suggesting that UV luminous galaxies at this redshift are generally compact. …”
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93
A Galaxy-scale Fountain of Cold Molecular Gas Pumped by a Black Hole
Published 2019“…The data map the kinematics of a three billion solar mass filamentary nebula that spans the innermost 30 kpc of the galaxy's core. …”
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94
An ultraluminous X-ray source powered by an accreting neutron star
Published 2015“…This association implies a luminosity of about 100 times the Eddington limit for a 1.4-solar-mass object, or more than ten times brighter than any known accreting pulsar. …”
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95
The structure and origin of magnetic clouds in the solar wind
Published 1998-01-01“…Plasma and magnetic field data from the Helios 1/2 spacecraft have been used to investigate the structure of magnetic clouds (MCs) in the inner heliosphere. 46 MCs were identified in the Helios data for the period 1974–1981 between 0.3 and 1 AU. 85% of the MCs were associated with fast-forward interplanetary shock waves, supporting the close association between MCs and SMEs (solar mass ejections). Seven MCs were identified as direct consequences of Helios-directed SMEs, and the passage of MCs agreed with that of interplanetary plasma clouds (IPCs) identified as white-light brightness enhancements in the Helios photometer data. …”
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96
EIGER. III. JWST/NIRCam Observations of the Ultraluminous High-redshift Quasar J0100+2802
Published 2023-01-01“…Our observations therefore confirm that this quasar hosts a 10 billion solar mass black hole less than 1 Gyr after the Big Bang, which is challenging to explain with current black hole formation models.…”
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97
Chiral Restoration of Nucleons in Neutron Star Matter: Studies Based on a Parity Doublet Model
Published 2023-03-01“…The quark models are constrained by the two-solar-mass conditions, and such constraints are transferred to nuclear models through the causality and thermodynamic stability conditions. …”
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98
A low initial abundance of (CM)-C-247 in the early solar system and implications for r-process nucleosynthesis
Published 2006“…The alternative models of 182Hf production via a neutron-rich fast s-process, occurring, for example, in the helium burning shell in a 25 solar mass star during explosive nucleosynthesis [G.J. …”
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99
The variability of radio pulsars
Published 2015“…<p>Neutron stars are amongst the most exotic objects known in the universe; more than a solar mass of material is squeezed into an object the size of a city, leading to a density comparable to that of an atomic nucleus. …”
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100
Redefining flux ropes in heliophysics
Published 2023-03-01“…They carry significant amounts of solar mass in the heliosphere. This paper underlines the need to advance our understanding of the fundamental physics of heliospheric flux ropes and provides the motivation to significantly improve the status quo of flux rope research through novel and requisite approaches. …”
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