Red-giant branch hydrogen fusion continues in stars of roughly solar mass until the helium core increases in mass sufficiently that it becomes degenerate. The core then shrinks, heats up, and develops a strong temperature gradient. The hydrogen shell, fusing via the temperature-sensitive CNO cycle, greatly increases its rate of energy production and the stars is considered to be at the foot of the red-giant branch. For a star the same mass as the sun, this takes approximately 2 billion years from the time that hydrogen was exhausted in the core. Subgiants more than about reach the Schönberg–Chandrasekhar limit relatively quickly before the
Southern Star Central Gas Pipeline FERC code is 43. The company was formed in 1904. In 1926, it was renamed Cities Service Gas Company. It was again renamed in 1982 to the Northwest Central Pipeline Corporation. Five years later it took the name Williams Natural Gas Company. In 1997, it was reorganized and called the Williams Gas Pipeline Central, Inc. In 2003, it was renamed the Southern Star Central Gas Pipeline, Inc. Southern Star's Central Pipeline brings gas from the Rocky Mountains, Texas, and Oklahoma to Kansas. From there it goes east to Missouri. Southern Star Central Gas Pipeline Southern Star Central Gas Pipeline, Inc,