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Hubble data suggests first "phoenix planet" born from dying star's remnants

A post says reanalysis of 1999 Hubble spectra identified niobium, while TESS detected a faint 4.4-day signal.

Deborah J. RossDJ
World of Science & TechnologyWO
2 Sources, 6h ago, first seen 6h ago

TLDR

A post says archival Hubble spectra revealed niobium at more than 1,000 times the Sun's level in a white dwarf. Researchers suspect a Jupiter-sized planet formed from material the star shed as it died; its atmosphere may be feeding gas back onto the star. TESS picked up a faint 4.4-day signal consistent with a giant in a tight orbit. The candidate would be the first second-generation planet found around a white dwarf if confirmed.

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2 Sources, first seen 6h ago

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Combined views

125

2 Sources, first seen 6h ago

2 likes1 saves1 reposts

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2 Sources

Deborah J. Ross@DeborahJRossAstronomers spy 'phoenix planet' rising from the ashes of a dead star. The newly detected exoplanet likely formed directly from the material that was shed by the dying red giant after it expanded and before it collapsed in on itself. #astronomy https://www.livescience.com/space/exoplanets/completely-unexpected-astronomers-spy-never-before-seen-phoenix-planet-rising-from-the-ashes-of-a-dead-star?utm_term=DDD5EA84-294F-4E92-82D0-D484CC712BAA&lrh=7834def88502fe481874f8deb219a99513d9e144b5b179feb87c7bcb8d8ff6e4&utm_campaign=368B3745-DDE0-4A69-A2E8-62503D85375D&utm_medium=email&utm_content=7C6D37E0-E151-4F84-B4B2-5DC156F5E3B0&utm_source=SmartBrief6h
World of Science & Technology@worldofscitech#Hubble had the clue for more than 25 years. It just took someone to read it. 🌌 In 1999, Hubble looked at a white dwarf called HS 0209+0832. Its light held around 100 chemical fingerprints nobody could identify. A cold case. Then Warwick PhD student Jamie Williams went back with an updated chemical database. Many of the mystery lines matched one element: Niobium. More than 1,000× the Sun's level. Never reported in a white dwarf before. Here's why that matters. Niobium isn't forged in a normal star's core. It's made as a star is dying. So the team's best explanation is breathtaking: A Jupiter-sized gas giant that formed from the material its own star cast off as it died. A second-generation world. A planet risen from the ashes. TESS caught a faint signal repeating every 4.4 days, consistent with a giant in a tight orbit. The scorching white dwarf seems to be boiling its atmosphere away. That gas rains back down onto the star, which is how the niobium got there. It's still a candidate. But if it's confirmed, it would be the first second-generation planet ever found around a white dwarf. We always thought a star's death was the last chapter. What if it's only the first? ✨ #Exoplanet #Astronomy #Space2h
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    2 Sources

    Deborah J. Ross@DeborahJRossAstronomers spy 'phoenix planet' rising from the ashes of a dead star. The newly detected exoplanet likely formed directly from the material that was shed by the dying red giant after it expanded and before it collapsed in on itself. #astronomy https://www.livescience.com/space/exoplanets/completely-unexpected-astronomers-spy-never-before-seen-phoenix-planet-rising-from-the-ashes-of-a-dead-star?utm_term=DDD5EA84-294F-4E92-82D0-D484CC712BAA&lrh=7834def88502fe481874f8deb219a99513d9e144b5b179feb87c7bcb8d8ff6e4&utm_campaign=368B3745-DDE0-4A69-A2E8-62503D85375D&utm_medium=email&utm_content=7C6D37E0-E151-4F84-B4B2-5DC156F5E3B0&utm_source=SmartBrief6h
    World of Science & Technology@worldofscitech#Hubble had the clue for more than 25 years. It just took someone to read it. 🌌 In 1999, Hubble looked at a white dwarf called HS 0209+0832. Its light held around 100 chemical fingerprints nobody could identify. A cold case. Then Warwick PhD student Jamie Williams went back with an updated chemical database. Many of the mystery lines matched one element: Niobium. More than 1,000× the Sun's level. Never reported in a white dwarf before. Here's why that matters. Niobium isn't forged in a normal star's core. It's made as a star is dying. So the team's best explanation is breathtaking: A Jupiter-sized gas giant that formed from the material its own star cast off as it died. A second-generation world. A planet risen from the ashes. TESS caught a faint signal repeating every 4.4 days, consistent with a giant in a tight orbit. The scorching white dwarf seems to be boiling its atmosphere away. That gas rains back down onto the star, which is how the niobium got there. It's still a candidate. But if it's confirmed, it would be the first second-generation planet ever found around a white dwarf. We always thought a star's death was the last chapter. What if it's only the first? ✨ #Exoplanet #Astronomy #Space2h
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