A brand new picture from the Gemini North telescope on Maunakea in Hawai’i provides the sharpest look but at a putting pair of interacting spiral galaxies, cataloged as NGC 7253.
This picture of NGC 7253 was captured by the Gemini North telescope on Maunakea, one half of the Worldwide Gemini Observatory. Picture credit score: Worldwide Gemini Observatory / NOIRLab / NSF / AURA / J. Miller & M. Rodriguez, Worldwide Gemini Observatory & NSF’s NOIRLab / T.A. Rector, College of Alaska Anchorage & NSF’s NOIRLab / D. de Martin & M. Zamani, NSF’s NOIRLab.
NGC 7253 is situated greater than 200 million light-years away within the constellation of Pegasus.
The system was discovered by the German-British astronomer Albert Marth on 9 September 1863.
It consists of two comparatively small-looking spiral galaxies separated by roughly 4 million light-years.
The northern member is mostly known as NGC 7253A, whereas the southern member is NGC 7253B.
They’re shut sufficient that their mutual gravity disturbs their constructions, producing a system sufficiently uncommon to be included in Halton Arp’s Atlas of Peculiar Galaxies as Arp 278.
The brand new picture of NGC 7253 was captured by the Gemini North telescope, one half of the Worldwide Gemini Observatory, partly funded by NSF and operated by NSF’s NOIRLab.
The image was produced as a part of the NOIRLab Legacy Imaging Program, an initiative that dedicates telescope time particularly to capturing detailed coloration pictures of astronomical objects for public outreach.
“NGC 7253 is an interesting object as a result of it’s two galaxies which can be merging into one over billions of years,” mentioned NOIRLab intern Raiyan Rahman.
“However we primarily picked this object as a result of it was one of many few that really lay inside a Hawaiian constellation, Ka Lupe o Kawelo.”
“After spending a lot time on Maunakea, it was vital to us to choose one thing that was each culturally and astronomically important.”
The picture reveals two equally sized spirals, with their wispy arms stretched and warped by the mutual pull of gravity because the galaxies slowly spiral towards a merger that may unfold over billions of years.
Scattered by the body are brilliant pink knots of sunshine, marking areas the place hydrogen gasoline has been ionized by intense radiation from newly fashioned stars.
Such fireworks are typical of galactic collisions: as the 2 programs draw nearer, clouds of gasoline and mud inside their spiral arms collide and compress, triggering bursts of star formation.
The younger, sizzling stars born from this course of flood the encircling gasoline with radiation intense sufficient to strip electrons from hydrogen atoms, producing the glowing pink clouds — recognized to astronomers as HII areas — that thread by the galaxies’ arms within the picture.
“Stars are sources of life and well being for us as human beings, as a result of our Solar is a star, and we can’t reside with out it,” mentioned NOIRLab intern Manu Silva-Sampaio.
