January 31, 2023


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A galaxy where three supernovae were found in 17 years captured by a dark energy camera |  Sorae Portal to space

A galaxy where three supernovae were found in 17 years captured by a dark energy camera | Sorae Portal to space

[▲ مجرة ​​حلزونية “NGC 4495” تم تصويرها بواسطة كاميرا الطاقة المظلمة (Credit: Dark Energy Survey / DOE / FNAL / DECam / CTIO / NOIRLab / NSF / AURA ؛ معالجة الصور: ترافيس ريكتور (جامعة ألاسكا أنكوراج / NSF’s NOIRLab) ، جين ميلر (مرصد الجوزاء / NOIRLab التابع لمؤسسة NSF) ومهدي زماني ودافيدي دي مارتن (NSF’s NOIRLab))]

This is a spiral galaxy about 200 million light-years away in the direction of the Coma Berenices.「NGC 4495he is. The nucleus of NGC 4495 shows weak activityliner

Known to be many faint, arm-like structures extending around the galaxy’s disk, which has spiral arms flanking the central portion, can be seen.

* LINER: An acronym for Low Ionization Nuclear Emission Line Region. Low-ionization central core emission line region, Reiner.According to the National Science Foundation’s (NSF) National Institute of Optical and Infrared Astronomy (NOIRLab), which released the images, NGC 4495 has been around for just over 20 years.Three supernovae “SN 1994S” “SN 2010lo” “SN 2011ca”

been detected.Supernovae are believed to occur through several processes, for example, a white dwarf may accumulate gas and reach a certain mass, or it may result from the merger of two white dwarfs as a supernova.“Write Ia”

Classified as SN 1994S was discovered in June 1994 and this type was Ia.Reference:

He succeeded in capturing a flash immediately after the occurrence of the “Type Ia supernova” observatory at the University of Tokyo’s Kiso ObservatoryOn the other hand, the supernova caused by the collapse of the core of a massive star at the end of its life depends on the state of the outer layer of the exploding star.Type Ib “Type Ic” “Type II”

Classified as SN 2011ca, discovered in April 2011, is believed to be a Type I supernova. Incidentally, we don’t seem to know what type of supernova SN 2010lo is, which was discovered just four months ago in December 2010.Reference:

Is it a companion star that survived the supernova explosion of the main star? Observation results from the Hubble Space TelescopeThis image shows the instrument installed in the Blanco 4m telescope at the Cerro Tololo Inter-American Observatory in Chile.Dark Energy Camera (DECam)

Created based on observational data of DECam, as its name suggests, developed primarily for the purpose of studying dark energy, is a device (about 520 megapixels). Observations for dark energy research were conducted by DECam from 2013 to 2019.

The image was initially released on October 12, 2022 as NOIRLab’s “Picture of the Week”.


Diffuse nebula NGC 6357 captured by the Dark Energy Camera

– Storm of Light

Text / Matsumura Takehiro

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