Hubble spies charming spiral galaxy bursting with stars

Image: Hubble spies charming spiral galaxy bursting with stars
Credit: ESA/Hubble, NASA and S. Smartt (Queen's University Belfast) Acknowledgement: Renaud Houdinet

(Phys.org) —The NASA/ESA Hubble Space Telescope observes some of the most beautiful galaxies in our skies—spirals sparkling with bright stellar nurseries, violent duos ripping gas and stars away from one another as they tangle together, and ethereal irregular galaxies that hang like flocks of birds suspended in the blackness of space.

However, galaxies, like humans, are not all supermodels. This little spiral, known as NGC 4102, has a different kind of appeal, with its tightly-wound spiral arms and understated, but charming, appearance.

NGC 4102 lies in the northern constellation of Ursa Major (The Great Bear). It contains what is known as a LINER, or low-ionization nuclear emission-line region, meaning that its nucleus emits particular types of radiation—specifically, emission from weakly-ionized or neutral atoms of certain elements. Even in this sense, NGC 4102 is not special; around one third of all are thought to be LINER galaxies.

Many LINER also contain intense regions of . This is thought to be intrinsically linked to their centers but just why, is still a mystery for astronomers—either the starbursts pour fuel inwards to fuel the LINERs, or this active central region triggers the starbursts. NGC 4102 does indeed contain a starburst region towards its center, where stars are being created at a rate much more furious than in a normal galaxy. This star formation is taking place within a small rotating disk, around 1000 light-years in diameter and with a mass some three billion times the mass of the sun.

This image uses infrared and visible observations taken using Hubble's Wide Field Planetary Camera 2.


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Image: Hubble views the whirling disk of NGC 4526

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Citation: Hubble spies charming spiral galaxy bursting with stars (2014, December 9) retrieved 19 October 2019 from https://phys.org/news/2014-12-hubble-spies-charming-spiral-galaxy.html
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Dec 09, 2014
No mystery when understood that the starburst region is highly concentrated toward the center in some galaxies where the supermassive grey hole is active and ejecting new matter at a high rate. Such a condition should be expected. It depends on the activity of the grey hole, which largely depends on it's mass; the greater the mass the greater the activity over time.

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