The Galactic Inquirer

Galactic and Extragalactic Astronomy

Statistical Properties of Fast Radio Bursts from the CHIME/FRB Catalog 1: The Case for Magnetar Wind Nebulae as Likely Sources

Fast Radio Bursts are flashes of radio emission lasting for several milliseconds. The time of arrival of signals depends on the radio frequency, called the dispersion measure (DM), which depends on the environment through which the signals travel, specifically the number of free electrons in their path. Very few FRBs have matches with sources observed at other wavelengths (Wikipedia - Fast Radio Burst).

Earth & Space Report #11: Surfing the Galactic Froth

This edition combines fun and science as only Dr. Waller can do, as we take a colorful look at what's going on in supposedly empty space between the stars in the Milky Way galaxy.

GAAC Meeting, February 12 2021 — Astrophoto Night

Some of GAAC's best Astrophotographers each show off a few of their favorite astro images.

Dispatches from the Cosmonet

This January, the American Astronomical Society held its big annual meeting completely online. The Covid-19 pandemic ruled out the society’s planned gathering in Scottsdale, AZ but the AAS pivoted by opening-up digital access to thousands of astronomers across the United States and around the world. More than 3,000 registrants were listed in the online portal, thus demonstrating that the vital communication of astronomical research, education, and public outreach could carry on in this alternative format.

December 11 GAAC Meeting, with Guest Robert Naeye and “A Cosmic Conundrum”

If the Big Bang theory is correct, how fast is the universe expanding? Astronomers are facing a troubling disconnect between different methods used to measure the expansion rate, known as the Hubble constant. The two methods are giving similar but slightly different rates. Either one method is providing inaccurate results, or there is some kind of unknown physics operating in the universe.

Earth & Space Report No 6, with AAVSO Director Stella Kafka

Guest Presenter and AAVSO Director Stella Kafka reviews her tenure as Director, and discusses the role of the AAVSO in current stellar research.

Latest news

Statistical Properties of Fast Radio Bursts from the CHIME/FRB Catalog 1: The Case for Magnetar Wind Nebulae as Likely Sources

Fast Radio Bursts are flashes of radio emission lasting for several milliseconds. The time of arrival of signals depends on the radio frequency, called the dispersion measure (DM), which depends on the environment through which the signals travel, specifically the number of free electrons in their path. Very few FRBs have matches with sources observed at other wavelengths (Wikipedia - Fast Radio Burst).

Sensing the Biochemical Character of Galactic Ecosystems

...What we have come to appreciate is the seminal role played by clustered star formation in driving the physical and chemical evolution of the galaxies that host these stellar nurseries. Such concentrated sites of newborn stars along with their nebular environs constitute what are known as galactic ecosystems. These energized realms represent vital “crucibles” for growing the chemical complexity that is necessary for biotic processes.

Earth & Space Report #12: Exploring our Cosmic Origins

Carl Sagan wrote that "If you wish to make an apple pie from scratch, you must first invent the universe.” We wish to know our home, so back we go, to the Big Bang, and step by step to today.

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Perspective: The Case for Coordinating Earth & Space Science Education

In this essay, I argue in support of teaching the Earth & space sciences together, so that students can attain a more holistic understanding of their planetary environment, how it came to be, and where it is headed. Such teaching (and teachers) should receive the same priority as in the teaching of physics, chemistry, and biology.

Statistical Properties of Fast Radio Bursts from the CHIME/FRB Catalog 1: The Case for Magnetar Wind Nebulae as Likely Sources

Fast Radio Bursts are flashes of radio emission lasting for several milliseconds. The time of arrival of signals depends on the radio frequency, called the dispersion measure (DM), which depends on the environment through which the signals travel, specifically the number of free electrons in their path. Very few FRBs have matches with sources observed at other wavelengths (Wikipedia - Fast Radio Burst).

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