Astronomical Object Found by Amateur Identified as New Dwarf Galaxy

New dwarf galaxy.

The newly discovered dwarf galaxy may be a satellite of the Triangulum galaxy, which would reassure experts that their theories around how galaxies are formed are correct. (Image: via University of Surrey)

Enthusiast Giuseppe Donatiello spotted the dwarf galaxy while scrutinizing publicly available data and his finding was investigated by professional astrophysicists, led by Dr. David Martinez-Delgado from the Instituto de Astrofisica de Andalucia, who used deeper images taken with the Telescopio Nazionale Galileo. By processing the data and performing photometric calibration, they confirmed the finding is a new dwarf galaxy, but they need further images from even more powerful telescopes to confirm its precise location and significance.

Pisces VII/Tri III is a newly discovered dwarf galaxy. Above is the dwarf galaxy UGCA 281.
Pisces VII/Tri III is a newly discovered dwarf galaxy. Above is the dwarf galaxy UGCA 281. (Image: via NASA, ESA, and the LEGUS team)

Their analysis has identified Pisces VII/Tri III as one of two things, either of which would make it an important astrophysical discovery. The team’s calculations show it is either an isolated dwarf galaxy, or it is a satellite of the Triangulum galaxy (M33). If it is isolated, it is thought to be the faintest field galaxy ever detected. If it is a satellite of M33, it could reassure experts that their theories around how galaxies are formed are correct. Emily Charles, a Ph.D. student at the University of Surrey who worked on the project, said:

Subscribe to our Newsletter!

Receive selected content straight into your inbox.

“Theoretical knowledge about galaxy formation means we’d expect to see many more little galaxies orbiting the Triangulum galaxy, M33. However, so far it only has one known satellite. If this newly identified galaxy  Does belong to M33, it might imply that there are many more that haven’t been uncovered yet as they are too faint to show up in previous surveys of the system. M33 currently challenges astrophysicists’ assumptions, but this new finding starts reassuring us that our theories are correct.”

What exactly dwarf galaxy Pisces VII/Tri III is needs to be confirmed

In order to confirm whether Pisces VII/Tri III is isolated or an M33 satellite, the team needs to accurately measure the distance to the galaxy and see how it is moving compared to M33. Both require further imaging using other telescopes. Noushin Karim, another Ph.D. student at the University of Surrey who helped identify Pisces VII/Tri III, said:

“Deep imaging from Hubble would allow us to reach fainter stars which act as more robust distance estimators, as they have a standard brightness. To confirm the new galaxy’s movement, we need imaging from an 8m or 10m telescope, like Keck or Gemini.”

A paper explaining their work and how they came to their conclusions is published in the peer-reviewed journal, Monthly Notices of the Royal Astronomical Society (MNRAS). Next, the team will apply for access to other telescopes in order to continue their analysis.

Provided by: University of Surrey [Note: Materials may be edited for content and length.]

Follow us on TwitterFacebook, or Pinterest

Recommended Stories

Propaganda vs. truth.

Be Careful What You Watch or Read: Beijing’s Massive Propaganda Machine Is Global

In George Orwell’s dystopian novel 1984, the main character, Winston Smith, rewrites history at the ...

The black capsule carrying samples from Bennu.

7 Years, Billions of Kilometers, A Handful of Dust: NASA Just Brought Back the Largest-Ever Asteroid Sample

After a journey of billions of kilometers, NASA’s OSIRIS-REx mission has culminated in a small ...

The spacecraft’s sampling arm.

OSIRIS-REx TAGs Surface of Asteroid Bennu

Captured on Oct. 20, 2020, during the OSIRIS-REx mission’s Touch-And-Go (TAG) sample collection event, this series ...

Beautiful, healthy skin.

8 Tips for a Nighttime Skincare Routine

Why is a nighttime skincare routine important? When you go to sleep, various organs, including ...

High tea.

Sip, Savor, and Soothe Your Soul: London’s Top 5 Tea Spots

London is a city full of history and tradition, and what better way to experience ...

Grandparents with their grandson.

7 Priceless Ways to Love Your Grandparents and Make Them Feel Special

“If nothing is going well, call your grandparents,” an Italian proverb goes. Your grandparents play ...

Asian female smiling with smooth skin.

Traditional Chinese Medicine Secrets: 3 Steps for Youthful Skin

The condition of your skin, complexion, and hair significantly impacts your appearance. Wrinkles around your ...

Artificial intelligence deepfakes.

How AI’s Wi-Fi Breakthroughs Open up a Future of Independent Learning and Growing Concerns

As technology continues to evolve, artificial intelligence, also known as AI, is becoming more and ...

Using an iPhone.

The Risks of Using China’s Public Wi-Fi

With the popularization of the Internet, free Wi-Fi is available in many public places worldwide. ...

Send this to a friend