The HEASARC welcomes your participation in a brief survey to capture how users access and utilize HEASARC data, software, and services. The outcome(s) of this survey will be used to guide, prioritize, and plan our activities and development in the coming years. It contains 18 questions, generally takes just a few minutes to complete, and your answers will remain totally anonymous. We thank you in advance for your valuable feedback.
Fermi Gamma-ray Space Telescope

Fermi Friday - Feb 02, 2018

It's Pulsar Month! Here's an Introduction to Gamma-Ray Pulsars

Pulsars are rapidly spinning neutron stars. Neutron stars are small, massive objects that form when a large star explodes. Because they are so small (about the size of a city), and massive (more massive than the Sun), the physics that occurs near a pulsar is much different than the kinds of physics we can study on Earth. In short, they're weird!



To find out more about neutron stars and pulsars, check out NASA's Tumblr post about these fascinating objects!

Neutron Stars are Weird!


Most pulsars in seen only at radio wavelengths. Young and powerful pulsars are visible in gamma rays. Surprisingly, about half of these are seen ONLY in gamma rays. The gamma rays Fermi sees (magenta) come from a distance away from the pulsar, while radio emission (green) comes from nearby the pulsar at the magnetic poles.

Gamma-ray pulsar emission region

And here's another NASA Tumblr post about five famous pulsars. Fermi sees three of these!

Five Famous Pulsars from the Past 50 Years


If you want to find out more about gamma-ray pulsars, check out the Fermi Pulsar Science page. Or you can dive into the news articles listed below.

Gamma-ray pulsar
population plot

Fermi Gamma-Ray Pulsars in the News

Here are some of NASA's press releases about Fermi pulsars from the past 10 years: