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Massive Gas Giant in Orbit around Red Dwarf Challenges Current Models of Planet Formation
Sci-News.com ^ | October 8, 2019 | News Staff / Source [J.C. Morales et al]

Posted on 11/17/2019 11:41:17 PM PST by SunkenCiv

Astronomers have discovered a massive exoplanet orbiting Gliese 3512 (GJ 3512), an M-dwarf star (red dwarf) located 31 light-years away. Dubbed Gliese 3512b, the planet has a mass of 0.46 Jupiter masses, very high for such a small host star, and an eccentric 204-day orbit. Using simulations, the researchers have also demonstrated that the Gliese 3512 planetary system challenges generally accepted theories of planet formation.

M-dwarf stars are low-mass stars that emit most of their faint light in the near-infrared. They the most common type of star in the Milky Way. However, despite their ubiquity, only about 10% of nearly 4,000 exoplanets discovered to date orbit these stars.

"Around such stars there should only be planets the size of the Earth or somewhat more massive super-Earths," said University of Bern's Professor Christoph Mordasini, co-author of a paper published in the journal Science.

"Gliese 3512b, however, is a giant planet with a mass about half as big as the one of Jupiter, and thus at least one order of magnitude more massive than the planets predicted by theoretical models for such small stars."

"Although we know about 4,000 planets outside the Solar System, there are still discoveries which bring new surprises. The planet around Gliese 3512 is one of those," said Georg-August-Universität's Professor Stefan Dreizler.

To discover Gliese 3512b, Professor Mordasini, Professor Dreizler and their colleagues used the Doppler technique, which monitors the back-and-forth motion of a star when it is orbited by one or more exoplanets.

They also found evidence suggesting the presence of another candidate planet in the system.

"Gliese 3512 was so faint that it almost did not make it into the list of targets," they said.

(Excerpt) Read more at sci-news.com ...


TOPICS: Astronomy; Science
KEYWORDS: dopplertechnique; gj3512; gliese3512; gliese3512b; xplanets
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An artist's impression of a Jupiter-like exoplanet and a cool red dwarf. Image credit: CARMENES / RenderArea / J. Bollain / C. Gallego

Image credit: CARMENES / RenderArea / J. Bollain / C. Gallego

1 posted on 11/17/2019 11:41:17 PM PST by SunkenCiv
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To: KevinDavis; annie laurie; Knitting A Conundrum; Viking2002; Ernest_at_the_Beach; Mmogamer; ...
The distances being what they are, even with improvements to technology over time, oddball systems will be disproportionately discovered.
 
X-Planets
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2 posted on 11/17/2019 11:43:14 PM PST by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: SunkenCiv

IBTUJ

In before the Uranus jokes.


3 posted on 11/18/2019 12:04:44 AM PST by rfp1234 (Obscured by Clods)
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To: SunkenCiv

Since we clearly know everything there is to about planet formation, this system doesn’t exist. It’s an undigested bit of beef, or a fragment of underdone potato stuck in the telescope’s lens.


4 posted on 11/18/2019 12:30:30 AM PST by Telepathic Intruder
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To: SunkenCiv

[Massive Gas Giant ]

must ... resist ... jokes ...


5 posted on 11/18/2019 12:46:05 AM PST by SaveFerris (Luke 17:28 ... as it was in the days of Lot; they did eat, they drank, they bought, they sold ......)
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To: rfp1234
What about the hillary ones?


6 posted on 11/18/2019 1:03:30 AM PST by C210N (If you dislike productive billionaires, be 1,000 times more suspect of one confiscatory trillionaire)
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To: SunkenCiv

Massive gas giant in orbit around Red Dwarf”

That’s Dave Lister after Kryten and Cat pitched him out ‘til his Chicken Vindaloo passes..,


7 posted on 11/18/2019 1:25:33 AM PST by skepsel (I miss William F. Buckley and the old Firing Line)
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To: SunkenCiv

“Generally accepted theories of planet formation.”

Aliens laugh at us.


8 posted on 11/18/2019 2:20:08 AM PST by wastedyears (The left would kill every single one of us and our families if they knew they could get away with it)
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To: Telepathic Intruder

I know right.


9 posted on 11/18/2019 2:20:45 AM PST by wastedyears (The left would kill every single one of us and our families if they knew they could get away with it)
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To: skepsel
That’s Dave Lister after Kryten and Cat pitched him out ‘til his Chicken Vindaloo passes..,


10 posted on 11/18/2019 4:39:31 AM PST by DCBryan1 (Quit calling them liberals, progs, socialists, or democrats. Call them what they are: COMMUNISTS!!!!)
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To: rfp1234

I’m appalled by the immaturity on these threads.

That being said, we really can’t DISPROVE that there is an alien of MAGNIFICENT proportion and size that eats BILLIONS or maybe TRILLIONS of franks and beans at at time...and the result is...


11 posted on 11/18/2019 4:44:47 AM PST by dp0622 (Radicals, racists Don't point fingers at me I'm a small town white boy Just tryin' to make ends meet)
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To: SunkenCiv
"Around such stars there should only be planets the size of the Earth or somewhat more massive super-Earths,"

LOL! If you say so, boss.

12 posted on 11/18/2019 4:53:40 AM PST by Sirius Lee (They are openly stating that they intend to murder us. Prep if you want to live.>>>)
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To: Sirius Lee

That is somehow considered a “SCIENCE” report?

Enough “maybe’s” and “should’s” to fill URANUS....


13 posted on 11/18/2019 5:57:57 AM PST by Nabber
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To: SunkenCiv

I thought that this thread was going to be about Michael Moore and Robert Reich.


14 posted on 11/18/2019 6:18:01 AM PST by Army Air Corps (Four Fried Chickens and a Coke)
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To: Army Air Corps

Excellent!


15 posted on 11/18/2019 7:54:16 AM PST by skepsel (I miss William F. Buckley and the old Firing Line)
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To: SunkenCiv

16 posted on 11/18/2019 7:58:27 AM PST by polymuser (It's discouraging to think how many people are shocked by honesty and ho few by deceit. Noel Coward)
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To: Army Air Corps

LOL!


17 posted on 11/18/2019 7:58:31 AM PST by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: wastedyears; Telepathic Intruder
And probably not just about this. :^)

18 posted on 11/18/2019 8:24:35 AM PST by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: SunkenCiv
If this planet has 46% of Jupiter's mass, and Jupiter's mass is 318 times that of earth, this planet has 146 times the mass of the earth.

Saturn, the second-most massive planet in our solar system, has less than one third Jupiter's mass.

19 posted on 11/18/2019 8:25:40 AM PST by Verginius Rufus
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To: dp0622
Yes, I wholeheartedly agree. Now pull my finger.

20 posted on 11/18/2019 8:29:31 AM PST by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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