Astronomers made a groundbreaking discovery by detecting a dormant stellar-mass black hole, the closest one to Earth yet found in the Milky Way. This first unambiguous detection of such a black hole presents an exciting opportunity for study, as it is only 1,600 light-years away and can provide insights into the evolution of binary systems.
Gemini North Telescope on Hawaii reveals first dormant, stellar-mass black hole.
Astronomers have discovered the closest black holeA black hole is a place in space where the gravitational field is so strong that not even light can escape it. Astronomers classify black holes into three categories by size: miniature, stellar, and supermassive black holes. Miniature black holes could have a mass smaller than our Sun and supermassive black holes could have a mass equivalent to billions of our Sun.” data-gt-translate-attributes=”[{“attribute”:”data-cmtooltip”, “format”:”html”}]”>black hole to Earth, the first unambiguous detection of a dormant stellar-mass black hole in the Milky WayThe Milky Way is the galaxy that contains our Solar System and is part of the Local Group of galaxies. It is a barred spiral galaxy that contains an estimated 100-400 billion stars and has a diameter between 150,000 and 200,000 light-years. The name "Milky Way" comes from the appearance of the galaxy from Earth as a faint band of light that stretches across the night sky, resembling spilled milk.” data-gt-translate-attributes=”[{“attribute”:”data-cmtooltip”, “format”:”html”}]”>Milky Way. Its close proximity to Earth, a mere 1,600 light-years away, offers an intriguing target of study to advance understanding of the evolution of binary systems.
The U.S. National Science Foundation provided funding support for the work. The astronomers used the Gemini North Telescope on Hawaii, operated by NSF’s NOIRLabNSF’s NOIRLab (formally named the National Optical-Infrared Astronomy Research Laboratory) is the US national center for ground-based, nighttime optical astronomy. NOIRLab serves as a focal point for community development of innovative scientific programs, the exchange of ideas, and creative development through its five programs — Cerro Tololo Inter-American Observatory (CTIO), the Community Science and Data Center (CSDC), the International Gemini Observatory, Kitt Peak National Observatory (KPNO) and Vera C. Rubin Observatory. ” data-gt-translate-attributes=”[{“attribute”:”data-cmtooltip”, “format”:”html”}]”>NOIRLab, one of the twin telescopes of the International Gemini Observatory.
The discovery was made possible by making observations of the motion of the black hole’s companion, a sunlike star that orbits the black hole at about the same distance as the Earth orbits the sun. Though there are likely millions of stellar-mass black holes in the Milky Way galaxy, those few that have been detected were uncovered by their energetic interactions with a companion star. As material from a nearby star spirals in toward the black hole, it becomes superheated and generates powerful X-rays and jets of material. If a black hole is not actively feeding, it is dormant and not directly detectable.
Astronomers using the International Gemini Observatory, operated by NSF’s NOIRLab, have discovered the closest-known black hole to Earth. This is the first unambiguous detection of a dormant stellar-mass black hole in the Milky Way. Its close proximity to Earth, a mere 1600 light-years away, offers an intriguing target of study to advance our understanding of the evolution of binary systems. Credit: International Gemini Observatory/NOIRLab/NSF/AURA/J. da Silva/Spaceengine/M. Zamani
This dormant black hole is about 10 times more massive than the sun and is located about 1,600 light-years away in the constellation Ophiuchus, making it three times closer to Earth than the previous record holder.
“Take the solar system, put a black hole where the sun is, and the sun where the Earth is, and you get this system,” explained Kareem El-Badry, an astrophysicist and lead author of a paper published in Monthly Notices of the Royal Astronomical Society.
The team relied not only on Gemini North’s superb observational capabilities but also on Gemini’s ability to provide data on a tight deadline, as the team had only a short window in which to perform their follow-up observations.
“As part of a network of space- and ground-based observatories, Gemini North has not only provided strong evidence for the nearest black hole to date but also the first pristine black hole system, uncluttered by the usual hot gas interacting with the black hole,” said NSF Gemini Program Officer Martin Still.
For more on this research:
Reference: “A Sun-like star orbiting a black hole” by Kareem El-Badry, Hans-Walter Rix, Eliot Quataert, Andrew W Howard, Howard Isaacson, Jim Fuller, Keith Hawkins, Katelyn Breivik, Kaze W K Wong, Antonio C Rodriguez, Charlie Conroy, Sahar Shahaf, Tsevi Mazeh, Frédéric Arenou, Kevin B Burdge, Dolev Bashi, Simchon Faigler, Daniel R Weisz, Rhys Seeburger, Silvia Almada Monter and Jennifer Wojno, 2 November 2022, Monthly Notices of the Royal Astronomical Society.
DOI: 10.1093/mnras/stac3140
The International Gemini Observatory is operated by a partnership of six countries: Canada, Chile, Brazil, Argentina, Korea, and the United States through NSF. The University of Hawaii manages the Gemini North site.
Source: SciTechDaily
