Alexander M. Hegedus
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View article: Identifying Habitable Exoplanets with Radio Telescopes on the Lunar Farside
Identifying Habitable Exoplanets with Radio Telescopes on the Lunar Farside Open
The search for habitable conditions beyond Earth is a top priority in astrophysics. The discovery of habitable exoplanets beyond our solar system will require a suite of instruments providing long-term monitoring for detection (e.g. with s…
View article: FarView: An in-situ manufactured lunar far side radio array concept for 21-cm Dark Ages cosmology
FarView: An in-situ manufactured lunar far side radio array concept for 21-cm Dark Ages cosmology Open
FarView is an early-stage concept for a large, low-frequency radio observatory, manufactured in-situ on the lunar far side using metals extracted from the lunar regolith. It consists of 100,000 dipole antennas in compact subarrays distribu…
View article: FarView: An In-Situ Manufactured Lunar Far Side Radio Array Concept for 21-cm Dark Ages Cosmology
FarView: An In-Situ Manufactured Lunar Far Side Radio Array Concept for 21-cm Dark Ages Cosmology Open
FarView is an early-stage concept for a large, low-frequency radio observatory, manufactured in-situ on the lunar far side using metals extracted from the lunar regolith. It consists of 100,000 dipole antennas in compact subarrays distribu…
View article: Bifrost: A Python/C++ Framework for High-Throughput Stream Processing in Astronomy
Bifrost: A Python/C++ Framework for High-Throughput Stream Processing in Astronomy Open
Radio astronomy observatories with high throughput back end instruments require real-time data processing. While computing hardware continues to advance rapidly, development of real-time processing pipelines remains difficult and time-cons…
View article: Supplementary Data and Methods from Expression of the Androgen Receptor Governs Radiation Resistance in a Subset of Glioblastomas Vulnerable to Antiandrogen Therapy
Supplementary Data and Methods from Expression of the Androgen Receptor Governs Radiation Resistance in a Subset of Glioblastomas Vulnerable to Antiandrogen Therapy Open
Supplementary Figure S1: Additional expression data and comparisons of AR expression by subtype, age, sex, and common molecular alterations. Supplementary Figure S2. Tumor growth plots and mice weights for in vivo studies. Supplementary Fi…
View article: Data from Expression of the Androgen Receptor Governs Radiation Resistance in a Subset of Glioblastomas Vulnerable to Antiandrogen Therapy
Data from Expression of the Androgen Receptor Governs Radiation Resistance in a Subset of Glioblastomas Vulnerable to Antiandrogen Therapy Open
New approaches are needed to overcome intrinsic therapy resistance in glioblastoma (GBM). Because GBMs exhibit sexual dimorphism and are reported to express steroid hormone receptors, we reasoned that signaling through the androgen recepto…
View article: Data from Expression of the Androgen Receptor Governs Radiation Resistance in a Subset of Glioblastomas Vulnerable to Antiandrogen Therapy
Data from Expression of the Androgen Receptor Governs Radiation Resistance in a Subset of Glioblastomas Vulnerable to Antiandrogen Therapy Open
New approaches are needed to overcome intrinsic therapy resistance in glioblastoma (GBM). Because GBMs exhibit sexual dimorphism and are reported to express steroid hormone receptors, we reasoned that signaling through the androgen recepto…
View article: Supplementary Data and Methods from Expression of the Androgen Receptor Governs Radiation Resistance in a Subset of Glioblastomas Vulnerable to Antiandrogen Therapy
Supplementary Data and Methods from Expression of the Androgen Receptor Governs Radiation Resistance in a Subset of Glioblastomas Vulnerable to Antiandrogen Therapy Open
Supplementary Figure S1: Additional expression data and comparisons of AR expression by subtype, age, sex, and common molecular alterations. Supplementary Figure S2. Tumor growth plots and mice weights for in vivo studies. Supplementary Fi…
View article: How to Deploy a 10-km Interferometric Radio Telescope on the Moon with Just Four Tethered Robots
How to Deploy a 10-km Interferometric Radio Telescope on the Moon with Just Four Tethered Robots Open
The Far-side Array for Radio Science Investigations of the Dark ages and\nExoplanets (FARSIDE) is a proposed mission concept to the lunar far side that\nseeks to deploy and operate an array of 128 dual-polarization, dipole antennas\nover a…
View article: Tracking the Source of Solar Type II Bursts through Comparisons of Simulations and Radio Data
Tracking the Source of Solar Type II Bursts through Comparisons of Simulations and Radio Data Open
The most intense solar energetic particle events are produced by coronal mass ejections (CMEs) accompanied by intense type II radio bursts below 15 MHz. Understanding where these type II bursts are generated relative to an erupting CME wou…
View article: A Lunar Farside Low Radio Frequency Array for Dark Ages 21-cm Cosmology
A Lunar Farside Low Radio Frequency Array for Dark Ages 21-cm Cosmology Open
An array of low-frequency dipole antennas on the lunar farside surface will probe a unique, unexplored epoch in the early Universe called the Dark Ages. It begins at Recombination when neutral hydrogen atoms formed, first revealed by the c…
View article: Low Radio Frequency Observations from the Moon Enabled by NASA Landed Payload Missions
Low Radio Frequency Observations from the Moon Enabled by NASA Landed Payload Missions Open
A new era of exploration of the low radio frequency universe from the Moon will soon be underway with landed payload missions facilitated by NASA's Commercial Lunar Payload Services (CLPS) program. CLPS landers are scheduled to deliver two…
View article: Localizing the Source of Type II Emission Around a CME with the Sun Radio Interferometer Space Experiment (SunRISE) and MHD Simulations
Localizing the Source of Type II Emission Around a CME with the Sun Radio Interferometer Space Experiment (SunRISE) and MHD Simulations Open
<p>The Earth&#8217;s Ionosphere limits radio measurements on its surface, blocking out any radiation below 10 MHz. Valuable insight into many astrophysical processes could be gained by having a radio interferometer in space to im…
View article: Tracking the Source of Solar Type II Bursts through Comparisons of\n Simulations and Radio Data
Tracking the Source of Solar Type II Bursts through Comparisons of\n Simulations and Radio Data Open
The most intense solar energetic particle events are produced by coronal mass\nejections (CMEs) accompanied by intense type II radio bursts below 15 MHz.\nUnderstanding where these type II bursts are generated relative to an erupting\nCME …
View article: Expression of the Androgen Receptor Governs Radiation Resistance in a Subset of Glioblastomas Vulnerable to Antiandrogen Therapy
Expression of the Androgen Receptor Governs Radiation Resistance in a Subset of Glioblastomas Vulnerable to Antiandrogen Therapy Open
New approaches are needed to overcome intrinsic therapy resistance in glioblastoma (GBM). Because GBMs exhibit sexual dimorphism and are reported to express steroid hormone receptors, we reasoned that signaling through the androgen recepto…
View article: Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface Open
In recent years there has been a renewed interest in returning to the Moon for reasons both scientific and exploratory in nature. The Moon provides the perfect training ground for building large scale bases that one may apply to other plan…
View article: The Temperature Anisotropy and Helium Abundance Features of Alfvénic Slow Solar Wind Observed by Parker Solar Probe, Helios, and Wind Missions
The Temperature Anisotropy and Helium Abundance Features of Alfvénic Slow Solar Wind Observed by Parker Solar Probe, Helios, and Wind Missions Open
Slow solar wind is typically characterized as having low Alfvénicity, but the occasional occurrence of highly Alfvénic slow solar wind (HASSW) raises questions about its source regions and evolution. In this work, we conduct a statistical …
View article: Proton Temperature Anisotropy Variations in Inner Heliosphere Estimated with the First Parker Solar Probe Observations
Proton Temperature Anisotropy Variations in Inner Heliosphere Estimated with the First Parker Solar Probe Observations Open
We present a technique for deriving the temperature anisotropy of solar wind protons observed by the Parker Solar Probe ( PSP ) mission in the near-Sun solar wind. The radial proton temperature measured by the Solar Wind Electrons, Alphas,…
View article: Measuring the Earth's Synchrotron Emission From Radiation Belts With a Lunar Near Side Radio Array
Measuring the Earth's Synchrotron Emission From Radiation Belts With a Lunar Near Side Radio Array Open
The high kinetic energy electrons that populate the Earth's radiation belts emit synchrotron emissions because of their interaction with the planetary magnetic field. A lunar near side array would be uniquely positioned to image this emiss…
View article: Measuring the Earth's Synchrotron Emission from Radiation Belts with a Lunar Near Side Radio Array
Measuring the Earth's Synchrotron Emission from Radiation Belts with a Lunar Near Side Radio Array Open
The high kinetic energy electrons that populate the Earth's radiation belts emit synchrotron emissions because of their interaction with the planetary magnetic field. A lunar near side array would be uniquely positioned to image this emiss…
View article: Probing the Universe with Space Based Low-Frequency Radio Measurements
Probing the Universe with Space Based Low-Frequency Radio Measurements Open
Due to Earth’s ionosphere, it is not possible to image the sky below 10 MHz. Any waves below this cutoff frequency are absorbed by the plasma in Earth’s ionosphere, whose free electron density determines the cutoff. A constellation of smal…
View article: Bifrost: A Python/C++ Framework for High-Throughput Stream Processing in Astronomy
Bifrost: A Python/C++ Framework for High-Throughput Stream Processing in Astronomy Open
Radio astronomy observatories with high throughput back end instruments require real-time data processing. While computing hardware continues to advance rapidly, development of real-time processing pipelines remains difficult and time-cons…
View article: Bifrost: a Python/C++ Framework for High-Throughput Stream Processing in\n Astronomy
Bifrost: a Python/C++ Framework for High-Throughput Stream Processing in\n Astronomy Open
Radio astronomy observatories with high throughput back end instruments\nrequire real-time data processing. While computing hardware continues to\nadvance rapidly, development of real-time processing pipelines remains\ndifficult and time-c…