Our Sun is a G-class star, producing light with an effective temperature of around K and a brightness of 1 solar luminosity.
Greater masses generally lead to higher temperatures, greater brightnesses, and shorter lifetimes. The active star-forming region, NGC , is located in a nearby galaxy just 10 million light-years away. The brightest star visible here is NGC V1, visible as the isolated, bright star in the dark void at left. Despite being 6,, times as bright as our Sun, it's only 20 times as massive, having likely brightened recently as the result of an outburst.
Very Massive Stars in the Local Universe door Jorick S. Vink (Boek) - ifedugadokir.gq
The 'supernova impostor' of the 19th century precipitated a gigantic eruption, spewing many Suns' worth of material into the interstellar medium from Eta Carinae. High mass stars like this within metal-rich galaxies, like our own, eject large fractions of mass in a way that stars within smaller, lower-metallicity galaxies do not.
Eta Carinae might be over times the mass of our Sun and is found in the Carina Nebula, but it is not among the most massive stars in the Universe. Luminosity isn't enough , as short-lived outbursts can cause exceptional, temporary brightening in typically massive stars. The star cluster NGC is located a little over 20, light-years away in our own Milky Way galaxy.
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The most massive star inside it is, NGC B, which is a Wolf-Rayet star located at the centre of the HD cluster which is contained within the large, overall star-forming region. Within our own Milky Way, massive star-forming regions, like NGC , house many stars over times our Sun's mass. The star at the center of the Heart Nebula IC is known as HD , which is a massive O-class star that is also a member of a binary system. With a directly-measured mass of solar masses, it is the most massive star we know of whose value is determined directly, rather than through evolutionary inferences.
The Large Magellanic Cloud, the fourth largest galaxy in our local group, with the giant star-forming region of the Tarantula Nebula 30 Doradus just to the right and below the main galaxy. It is the largest star-forming region contained within our Local Group. A large section of the Tarantula Nebula, the largest star-forming region in the Local Group, imaged by the Ciel Austral team.
At top, you can see the presence of hydrogen, sulfur, and oxygen, which reveals the rich gas and plasma structure of the LMC, while the lower view shows an RGB color composite, revealing reflection and emission nebulae. The star forming region 30 Doradus, in the Tarantula Nebula in one of the Milky Way's satellite galaxies, contains the largest, highest-mass stars known to humanity.
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The largest collection of bright, blue stars shown here is the ultra-dense star cluster R, which contains nearly stars that are approximately solar masses or greater. Many of them have brightnesses that exceed a million solar luminosities.
The book comprises 7 chapters, which describe this discipline and provide sufficient background and introductory content for graduate PhD students and researchers from different branches of astronomy to be able to enter this exciting new field of very massive stars. His primary research interests include mass loss from massive stars as a function of metallicity, line polarimetry to probe circumstellar geometries in massive evolved as well as young stars as to study star formation , and in Horizontal Branch morphologies.
Vink organized the Joint Discussion "Very massive stars in the local universe", which took place at the IAU General Assembly in Beijing, and where international top specialist in the field presented and discussed their research.
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