Dr. Krauss, a professor in the university’s School of Earth and Space Exploration, is director of Arizona State’s Origins Project, a multidisciplinary research effort to tackle questions about life, the universe and complex social problems. He gained prominence for his book, “The Physics of Star Trek” in 1995. He later became one of the leaders of the so-called “skeptics” movement that espouses science over religion. He has also written essays and Op-Ed articles that were published in The Times.

Michael Crow, president of Arizona State, told The State Press, an independent student news organization, that the university had received no complaints of harassment against Dr. Krauss. The university started the investigation after being contacted by BuzzFeed.

Dr. Krauss moved to Arizona State from Case Western Reserve University in Ohio in 2008.

On Wednesday afternoon, Dr. Krauss posted a lengthy rebuttal to the BuzzFeed article. He said many of the incidents reported by BuzzFeed were based on unsubstantiated rumors and others were distorted and misleading.

“Has my language or demeanor sometimes made others feel uncomfortable?” Dr. Krauss wrote. “Clearly yes, and for that I sincerely apologize. Nevertheless, the BuzzFeed article effectively paints a false picture of me and my relationships with others through a mosaic constructed largely out of anonymous hearsay and a web of often vague innuendo.”

The university is not the only one to take action against Dr. Krauss. The American Physical Society and other organizations have withdrawn invitations to Dr. Krauss for upcoming talks. The Center for Inquiry, an organization that promotes secularism, suspended its association with Dr. Krauss on Monday.