ALMA Discovers Trio of Infant Planets around Newborn Star

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bystander
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ALMA Discovers Trio of Infant Planets around Newborn Star

Post by bystander » Wed Jun 13, 2018 3:27 pm

ALMA Discovers Trio of Infant Planets around Newborn Star
ALMA | ESO | NRAO | NAOJ | 2018 Jun 13

Novel technique to find youngest planets in our galaxy

Click to view full size image 1 or image 2
Credit: ESO, ALMA (ESO/NAOJ/NRAO); Pinte et al.
Two independent teams of astronomers have used ALMA to uncover convincing evidence that three young planets are in orbit around the infant star HD 163296. Using a novel planet-finding technique, the astronomers identified three disturbances in the gas-filled disc around the young star: the strongest evidence yet that newly formed planets are in orbit there. These are considered the first planets to be discovered with ALMA.

The Atacama Large Millimeter/submillimeter Array (ALMA) has transformed our understanding of protoplanetary discs — the gas- and dust-filled planet factories that encircle young stars. The rings and gaps in these discs provide intriguing circumstantial evidence for the presence of protoplanets [1]. Other phenomena, however, could also account for these tantalising features.

But now, using a novel planet-hunting technique that identifies unusual patterns in the flow of gas within a planet-forming disc around a young star, two teams of astronomers have each confirmed distinct, telltale hallmarks of newly formed planets orbiting an infant star [2]. ...

To make their respective discoveries, each team analysed ALMA observations of HD 163296, a young star about 330 light-years from Earth in the constellation of Sagittarius (The Archer) [3]. This star is about twice the mass of the Sun but is just four million years old — just a thousandth of the age of the Sun. ...

New and Improved Way to Find Baby Planets
Carnegie Institution for Science | 2018 Jun 13

Kinematic Evidence for an Embedded Protoplanet in a Circumstellar Disc - C. Pinte et al A Kinematical Detection of Two Embedded Jupiter Mass Planets in HD 163296 - Richard Teague et al
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Last edited by bystander on Sun Jun 17, 2018 5:03 pm, edited 1 time in total.
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Ann
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Re: ALMA Discovers Trio of Infant Planets around Newborn Star

Post by Ann » Fri Jun 15, 2018 5:49 am

HD 163296, young A-type star with planets.
ESO Astronomy (ALMA (ESO/NAOJ/NRAO)/C. Pinte et al.

HD 163296 is a young A1-type star.

The A-type stars keep delivering. :yes:

Ann
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