This is a diffused nebula about 7100 light-years away in the direction of “Cassiopeia”.「NGC 7635」is.The image is“Hubble”It was created from the observation data acquired by the Space Telescope “Wide Field Camera 3 (WFC3)” in February 2016.Hubble Space Telescope 26th Anniversary ImageIt was released in April of the same year.The color of the image isBlue is oxygen、Green is hydrogen、Red is nitrogenCorresponds to the distribution of.
NGC 7635 has an impressive spherical structure that looks like a bubble.“Bubble Nebula”Also called. According to the American Space Telescope Science Institute (STScI), which operates the Hubble Space Telescope.Bubble width is about 7 light-years.. Since the distance from the Sun to the nearest star “Alpha Centauri” is about 4.3 light-years, the bubble nebula is about 1.5 times as wide as that.
This bubble nebulaConvert to “sound”The work, which was compiled into a short video, was released by NASA’s Goddard Space Flight Center.FirstThe mysterious tone of the bubble nebula converted into soundPlease enjoy.
▲Sonification of the Bubble Nebula▲
（Credit: Sonification: SYSTEM Sounds (M. Russo, A. Santaguida)）
Such a method of conveying information such as images using non-speech sounds“Sonification”It is called (audible). In the video, the vertical direction of the image is replaced with the flow of time, and thenImage color at pitchbut,Brightness with the strength of the soundIs expressed.The first half spreads to the upper left of the imageLow tones corresponding to red and orangeSounds, but when the playback part approaches the bubble nebulaHigh sound corresponding to blueWill be played strongly.
The bubble-like structure that characterizes the bubble nebula is the star inside the bubble.「BD +60°2522」It is believed that the gas blown out as a stellar wind from (SAO 20575) collided with the cold interstellar gas spreading around the stars and pushed away the interstellar gas. In the image at the beginning, this star appears as a red light spot in the upper left when viewed from the center of the bubble.
According to STScI, BD + 60 ° 2522Mass is more than 40 times that of the sunThere is also a very bright and short-lived star,About 4 million years since birthIs estimated to have passed.It is believed that most of the hydrogen in the outer layer is lost on this star and the fusion reaction of helium is proceeding, and 10 to 20 million years later.Supernova explosionIs expected to cause.
Image Credit: NASA, ESA, Hubble Heritage Team
Sonification Credit: SYSTEM Sounds (M. Russo, A. Santaguida)
Source: Goddard Space Flight Center
Sentence / Takehiro Matsumura