Unearthing the Shadows: NASA’s Quest to Count Hidden Black Holes

“I am astounded by how beneficial IRAS and NuSTAR were for this undertaking, especially considering IRAS was operational over 40 years ago,” remarked study leader Peter Boorman, an astrophysicist at Caltech in Pasadena, California. “I believe it reflects the enduring significance of telescope archives and the advantage of employing various instruments and light wavelengths together.”

Numerical Benefits

Establishing the quantity of concealed black holes in comparison to those that are not hidden can assist scientists in comprehending how these black holes attain such sizes. If they expand by consuming matter, then a considerable number of black holes ought to be enveloped by dense clouds and possibly obscured. Boorman and his collaborators assert that their research bolsters this theory.

Furthermore, black holes affect the galaxies they inhabit, primarily by influencing the growth of galaxies. This occurs because black holes surrounded by substantial clouds of gas and dust can devour immense — though not limitless — quantities of matter. If an excessive amount falls toward a black hole simultaneously, the black hole begins to expel the surplus and shoots it back into the galaxy. This can scatter gas clouds within the galaxy where star formation is taking place, hindering the pace of star creation there.

“If black holes were absent, galaxies would be considerably larger,” stated Poshak Gandhi, a professor of astrophysics at the University of Southampton in the United Kingdom and a coauthor of the current study. “Thus, if our Milky Way galaxy lacked a supermassive black hole, there could be far more stars visible in the sky. That is merely one illustration of how black holes can shape a galaxy’s evolution.”

Further Information on NuSTAR

A Small Explorer mission overseen by Caltech and managed by NASA’s Jet Propulsion Laboratory in Southern California for the agency’s Science Mission Directorate in Washington, NuSTAR was developed in collaboration with the Danish Technical University and the Italian Space Agency (ASI). The spacecraft was constructed by Orbital Sciences Corp. in Dulles, Virginia. NuSTAR’s operational headquarters is located at the University of California, Berkeley, with the official data archive kept at NASA’s High Energy Astrophysics Science Archive Research Center within NASA’s Goddard Space Flight Center. ASI provides the mission’s ground station and a mirror data archive. Caltech manages JPL for NASA.

For additional information regarding NuSTAR, please visit:

www.nustar.caltech.edu