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Black Hole at Center of Milky Way Is Unpredictable and Chaotic – Mysterious Flares Erupt Every Day

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Black Hole at Center of Milky Way Is Unpredictable and Chaotic – Mysterious Flares Erupt Every Day

An international team of researchers led by graduate student Alexis Andrés has discovered that Sagittarius A*, the black hole at the center of the Milky Way, is not only flaring erratically every day, but also over the long term. The team came to this conclusion after analyzing 15 years of data. The research was initiated by Andres in 2019 when he was a summer student at the University of Amsterdam. In the years that followed, he continued his research, which will now be published in the Monthly Notices of the Royal Astronomical Society.

Sagittarius A* is a strong source of radio, X-rays and gamma rays (visible light is blocked by gas and dust). For decades, astronomers have known that Sagittarius A* flickers every day, emitting bursts of radiation 10 to 100 times brighter than the normal signal observed from black holes. To learn more about these mysterious flares, Andres looked for patterns in 15 years of data provided by NASA’s Neil Gehrels Swift Observatory, an Earth-orbiting satellite dedicated to detecting gamma-ray bursts. The Swift Observatory has been observing gamma rays from black holes since 2006. Analysis of the data shows that activity levels were high from 2006 to 2008, with a sharp drop in activity over the next four years. After 2012, the frequency of flares increased again—researchers struggled to distinguish a pattern.

Over the next few years, the team of astronomers hopes to collect enough data to rule out whether changes in Sagittarius A* flares are due to passing gas clouds or stars, or if there is something else that could explain the observed irregular activity From the black hole at the center of our galaxy.

“The Swift Observatory’s long datasets did not happen by chance,” said co-author and former director Dr. Nathalie Degenaar of Andres at the University of Amsterdam. When she was a doctoral student, her request for the Swift satellite to make these specific measurements was granted. “I’ve been regularly requesting more observation time since then. It’s a very special observation program that allows us to do a lot of research.”

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Co-author Dr Jakob van den Eijnden from the University of Oxford commented on the team’s findings: “Exactly how flares occur is still unclear. It was previously thought that more flares would occur after gas clouds or stars pass through a black hole, but it is not yet known. There’s no evidence for that. And we haven’t been able to confirm the hypothesis that the magnetism of the surrounding gas also plays a role.”

Complete News Source : SciTechDaily

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Patterns of behaviour that emerge after trauma

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Patterns of behaviour that emerge after trauma

Trauma is a deeply distressing or disturbing experience that can leave a lasting impact on a person’s mental and emotional health. It can result from a range of events, such as natural disasters, accidents, physical or emotional abuse, or military combat. Trauma can have a significant effect on a person’s behavior and can manifest in various ways. Here are some patterns of behavior that often emerge after trauma:

  1. Hyperarousal: After experiencing trauma, a person may feel constantly on edge, with heightened levels of anxiety and tension. This can manifest as irritability, restlessness, and difficulty sleeping.
  2. Avoidance: Trauma can also cause a person to avoid situations, people, or places that remind them of the traumatic experience. This can lead to social withdrawal, isolation, and a loss of interest in previously enjoyable activities.
  3. Emotional numbness: Trauma can cause a person to feel emotionally disconnected or numb, making it difficult for them to experience positive emotions such as joy or love.
  4. Hypervigilance: A person who has experienced trauma may be hyper-aware of their surroundings and perceive threats where none exist. This can lead to an increased sense of danger, which can trigger anxiety or panic attacks.
  5. Flashbacks: Trauma can cause a person to experience vivid and intrusive memories of the traumatic event. These flashbacks can be triggered by a range of stimuli, such as sights, sounds, or smells.
  6. Guilt and shame: Trauma can cause a person to experience feelings of guilt, shame, and self-blame. They may feel responsible for what happened to them, even when it was beyond their control.
  7. Substance abuse: Trauma can lead to the use of drugs or alcohol as a way of coping with difficult emotions. This can quickly become a self-destructive pattern of behavior that exacerbates the trauma.

It’s important to note that not everyone who experiences trauma will display all of these behaviors, and that each person’s response to trauma is unique. However, recognizing these patterns of behavior can help individuals and their loved ones identify when trauma may be a contributing factor to mental and emotional health challenges. Seeking professional support, such as therapy or counseling, can help individuals process their trauma and learn healthy coping mechanisms to manage their behavior.

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