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A giant star has a substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature. [1] They lie above the main sequence (luminosity class V in the Yerkes spectral classification) on the Hertzsprung–Russell diagram and correspond to luminosity classes II and III. [2]
In August 2020, the U.S. Food and Drug Administration (FDA) became aware of nitrosamine impurities in certain samples of rifampin. [62] The FDA and manufacturers are investigating the origin of these impurities in rifampin, and the agency is developing testing methods for regulators and industry to detect the 1-methyl-4-nitrosopiperazine (MNP ...
About Wikipedia; Contact us; Contribute Help; ... Tiếng Việt; ... Pages in category "Giant stars" The following 5 pages are in this category, out of 5 total. ...
The most luminous known asymptotic giant branch star. [20] Widely recognised as being among the largest known stars. [21] NML Cygni < 1,350 +195 −229 [c] AD Surrounding dusty region is very complex making the radius hard to determine. [22] Stephenson 2 DFK 2 1,300 ± 300 [12] L/T eff: Another red supergiant, Stephenson 2 DFK 1 has an ...
Rifampin rapidly kills fast-dividing bacilli strains as well as "persisters" cells, which remain biologically inactive for long periods of time that allow them to evade antibiotic activity. [7] In addition, rifabutin and rifapentine have both been used against tuberculosis acquired in HIV-positive patients.
This is a list of the nearest giant stars (luminosity class III or II) to the Earth, located at a distance of up to 100 light-years (31 pc). List. Name
[5] With an estimated age of 4.58 billion years, [6] Kappa Persei Aa is an evolved G-type giant star with a stellar classification of G9.5 IIIb. [3] It is a red clump giant, which means that it is generating energy at its core through the nuclear fusion of helium. [16] The star has about 1.5 [6] times the mass of the Sun and 9 [4] times the Sun ...
Alpha Lupi is a giant star with a stellar classification of B1.5 III. [4] It has about ten times the mass of the Sun [ 7 ] yet is radiating 18,000 times the Sun's luminosity. The outer atmosphere has an effective temperature of 24,550 K, [ 8 ] which gives it the blue-white glow of a B-type star .