Hubble Catches the Final Acts of a Monster Star
This contrasting view shows blowing dust bubbles and an emerging gas shell– the last acts of a monster star. You can check out the information of the nebula bordering the star AG Carinae in the high-resolution pictures listed below.
This Photo of the Week showcases new sights of the twin nature of the star AG Carinae, the target of the NASA/ESA Hubble Space Telescope’s 31st-anniversary photo in April 2020. This new perspective was developed thanks to Hubble’s monitorings of the star in 2020 and 2014, with others recorded by the telescope’s WFPC2 instrument in 1994. You can compare these two new versions of AG Carinae using the slider tool in the picture above.
The initial photo showcases the description of the nebula’s ionized hydrogen and ionized nitrogen emissions (seen here in red). In the 2nd photo, the blue demonstrates the contrasting appearance of the distribution of the dust that beams of mirrored stellar light. Astronomers think that the dust bubbles and filaments developed within and were shaped by the tremendous stellar wind.
This massive star is engaging in a rivalry between gravity and radiation to prevent self-destruction. The star is bordered by a broadening layer of gas and dust– a nebula– shaped by the tremendous winds rising from the star. The nebula is roughly five light-years wide, equal to the range from here to our nearby star, Alpha Centauri.
AG Carinae is officially identified as a Luminous Blue Variable because it is hot (blue), really luminous, and variable. Such stars are relatively rare since few stars are so massive. Luminous Blue Variable stars continually shed mass in the final moments of their life, during which a significant amount of stellar product is ejected right into the surrounding interstellar space. The star continues to shed mass until a sufficient amount of mass has shed, allowing the star to reach a stable state.
AG Carinae is bordered by a great nebula, formed by material expelled by the star throughout several of its past outbursts. The nebula is about 10,000 years old, and the observed velocity of the gas is around 70 kilometers per second. While this nebula resembles a ring, it remains, in reality, a hollow cover abundant in gas and dust, the center of which has been vacated by the tremendous stellar wind taking a trip at about 200 kilometers per second. The gas (composed mainly of ionized hydrogen and nitrogen) is seen to us in these photos as a thick bright red ring, which appears increased in areas– potentially the result of several outbursts colliding into each other. The dust, here noticeable in blue, has formed in clumps, bubbles, and filaments formed by the stellar wind.
Scientists that observed the star, as well as its surrounding nebula, note that the ring is not flawlessly spherical; it appears to have a bipolar symmetry, suggesting that the device generating the outburst may have been caused by the presence of a disc in the center, or that the star is not alone on the other hand may have a partner (referred to as a binary star). An alternative and easier theory are that the star rotates exceptionally quickly (as lots of massive stars have been found to do).
Originally published on Scitechdaily.com. Read the original article.
