A5053023816- Astronomical Observations and Instrumentation
- Geophysics and Gravity Measurements
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Pulsars and Gravitational Waves Research
- Galaxies: Formation, Evolution, Phenomena
- Solar and Space Plasma Dynamics
- Cosmology and Gravitation Theories
- Astro and Planetary Science
- Scientific Research and Discoveries
- Space Exploration and Technology
- Fault Detection and Control Systems
- Algorithms and Data Compression
- Astrophysical Phenomena and Observations
- GNSS positioning and interference
- Nuclear Physics and Applications
- Planetary Science and Exploration
- Soil Moisture and Remote Sensing
- Optical Systems and Laser Technology
- Astrophysics and Star Formation Studies
- Geophysics and Sensor Technology
- Astrophysics and Cosmic Phenomena
Princeton University
2024
University of California, Berkeley
2021-2024
Abstract We present optical follow-up imaging obtained with the Katzman Automatic Imaging Telescope, Las Cumbres Observatory Global Telescope Network, Nickel Swope and Thacher of LIGO/Virgo gravitational wave (GW) signal from neutron star–black hole (NSBH) merger GW190814. searched GW190814 localization region (19 deg 2 for 90th percentile best localization), covering a total 51 94.6% two-dimensional region. Analyzing properties 189 transients that we consider as candidate counterparts to...
We study the effect of baryons on cosmic web -- halos, filaments, walls, and voids. To do so, we apply a modified version NEXUS, morphological analysis algorithm, to IllustrisTNG simulations. find that halos lose more than $10\%$ their mass due baryons, mostly filaments small portion walls However, transfer does not significantly shift boundaries structures, leaving volume fractions structures largely unaffected. quantify effects baryonic feedback power spectrum probability density function...
Abstract We present a new python package sarabande for measuring 3- and 4-point correlation functions (3/4 PCFs) in $\mathcal {O} (N_{\mathrm{g}}\log N_{\mathrm{g}})$ time using fast Fourier transforms (FFTs), with Ng being the number of grid points used FFT. can measure both projected full 3-point function on gridded two- three-dimensional data sets. The general technique is to generate suitable angular basis an underlying grid, radially bin these create kernels, convolve kernels original...
ABSTRACT We study transits of several ‘hot Jupiter’ systems, including WASP-12 b, WASP-43 WASP-103 HAT-P-23 KELT-16 WD 1856+534 and WTS-2 with the goal detecting tidal orbital decay extending baselines transit times. find no evidence in any observed systems except for that extensively studied b. Although orbit b is unequivocally decaying, we acceleration said decay, measured $\ddot{P} = (-7 \pm 8) \times 10^{-14} \, \rm s^{-1}$, against expected \approx -10^{-23} s^{-1}$. In case there a...
We present BVRI and unfiltered Clear light curves of 70 stripped-envelope supernovae (SESNe), observed between 2003 2020, from the Lick Observatory Supernova Search (LOSS) follow-up program. Our SESN sample consists 19 spectroscopically normal SNe~Ib, two peculiar SNe Ib, six SN Ibn, 14 Ic, one ten Ic-BL, 15 IIb, ambiguous IIb/Ib/c, superluminous SNe. photometry has (on a per-SN basis) mean coverage 81 photometric points (median 58 points) cadence 3.6d 1.2d). From our full sample, subset 38...
We present high-cadence photometric and spectroscopic observations of SN~2020jfo in ultraviolet optical/near-infrared bands starting from $\sim 3$ to 434$ days after the explosion, including earliest data with 10.4\,m GTC. is a hydrogen-rich Type II SN relatively short plateau duration ($67.0 \pm 0.6$ days). When compared other supernovae (SNe) similar or shorter lengths, exhibits fainter peak absolute $V$-band magnitude ($M_V = -16.90 0.34$ mag). shows significant H$\alpha$ absorption phase...
In the Interstellar Medium (ISM), gas and dust evolve under magnetohydrodynamic (MHD) turbulence. This produces dense, non-linear structures that then seed star formation. Observationally theoretically, turbulence is quantified by summary statistics such as 2-Point Correlation Function (2PCF) or its Fourier-space analog power spectrum. These cannot capture non-Gaussian correlations coming from turbulence's highly nature. We here for first time apply 4-Point (4PCF) to turbulence, measuring it...
We describe the $\texttt{Period detection and Identification Pipeline Suite}$ ($\texttt{PIPS}$) -- a new, fast, statistically robust platform for period analysis of astrophysical time-series data. $\texttt{PIPS}$ is an open-source Python package that provides various pre-implemented methods customisable framework automated, measurements with principled uncertainties statistical significance calculations. In addition to detailing general algorithm underlies $\texttt{PIPS}$, this paper...
We present a new $\texttt{python}$ package SARABANDE for measuring 3 & 4 Point Correlation Functions (3/4 PCFs) in $\mathcal{O}(N_{\rm g} \log N_{\rm g})$ time using Fast Fourier Transforms (FFTs), with $N_{\rm g}$ the number of grid points used FFT. can measure both projected and full PCFs on gridded 2D 3D datasets. The general technique is to generate suitable angular basis functions an underlying grid, radially bin these create kernels, convolve kernels original data obtain expansion...
We study transits of several ``hot Jupiter'' systems - including WASP-12 b, WASP-43 WASP-103 HAT-P-23 KELT-16 WD 1856+534 and WTS-2 b with the goal detecting tidal orbital decay extending baselines transit times. find no evidence in any observed except for that extensively studied b. Although orbit is unequivocally decaying, we acceleration said decay, measured $\ddot{P} = (-7 \pm 8) \times 10^{-14} \rm ~s^{-1}$, against expected \approx -10^{-23} ~s^{-1}$. In case there a tentative...
We present high-cadence photometric and spectroscopic observations of SN~2020jfo in ultraviolet optical/near-infrared bands starting from $\sim 3$ to 434$ days after the explosion, including earliest data with 10.4\,m GTC. is a hydrogen-rich Type II SN relatively short plateau duration ($67.0 \pm 0.6$ days). When compared other supernovae (SNe) similar or shorter lengths, exhibits fainter peak absolute $V$-band magnitude ($M_V = -16.90 0.34$ mag). shows significant H$α$ absorption phase that...
We study the effect of baryons on cosmic web -- halos, filaments, walls, and voids. To do so, we apply a modified version NEXUS, morphological analysis algorithm, to IllustrisTNG simulations. find that halos lose more than $10\%$ their mass due baryons, mostly filaments small portion walls However, transfer does not significantly shift boundaries structures, leaving volume fractions structures largely unaffected. quantify effects baryonic feedback power spectrum probability density function...