Two Massive Jupiter-Sized Exoplanets Discovered With TESS (phys.org) 19
Using NASA's Transiting Exoplanet Survey Satellite (TESS), an international team of astronomers has detected two new extrasolar planets. Phys.Org reports: The newfound alien worlds, designated TOI-5152 b and TOI-5153 b, are the size of Jupiter but about three times more massive than the solar system's biggest planet. [...] TOI-5152 b has a radius of about 1.07 Jupiter radii and is approximately three times more massive than Jupiter. It orbits its parent star every 54.19 days, at a distance of some 0.31 AU from it. The planet's equilibrium temperature was measured to be 688 K. The host TOI-5152 is a G1-type star nearly two times larger than the sun, located about 1,200 light years away from the Earth. Its age is estimated to be between 1.4 and 6.8 billion years.
TOI-5153 b has a mass of 3.26 Jupiter masses, while its radius was estimated to be 1.06 Jupiter radii. The orbital period of this exoplanet was measured to be 20.33 days and its distance to the host is nearly 0.16 AU. The astronomers calculated that the equilibrium temperature of TOI-5153 b is at a level of 906 K. The parent star is of spectral type F8. It is about 40% larger than the sun and is assumed to be 5.4 billion years old. The distance to this planetary system is about 1,270 light years. Therefore, TOI-5152 b and TOI-5153 b are warm and massive Jupiter-sized alien worlds. The astronomers noted that they are both metal-enriched and their heavy element content is consistent with the mass-metallicity relation of gas giants. Given that the two planets orbit moderately bright stars, the authors of the paper added that they are ideal targets for additional observations. The findings have been reported on the arXiv pre-print repository.
TOI-5153 b has a mass of 3.26 Jupiter masses, while its radius was estimated to be 1.06 Jupiter radii. The orbital period of this exoplanet was measured to be 20.33 days and its distance to the host is nearly 0.16 AU. The astronomers calculated that the equilibrium temperature of TOI-5153 b is at a level of 906 K. The parent star is of spectral type F8. It is about 40% larger than the sun and is assumed to be 5.4 billion years old. The distance to this planetary system is about 1,270 light years. Therefore, TOI-5152 b and TOI-5153 b are warm and massive Jupiter-sized alien worlds. The astronomers noted that they are both metal-enriched and their heavy element content is consistent with the mass-metallicity relation of gas giants. Given that the two planets orbit moderately bright stars, the authors of the paper added that they are ideal targets for additional observations. The findings have been reported on the arXiv pre-print repository.
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Nah, that's just your mom's apartment.
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Nah, that's just your mom's apartment.
Sounds like somebody woke up on the wrong side of the orbital plane this morning.
I don't care (Score:2, Offtopic)
We've established that large exoplanets are about as common as stars themselves; it's not news. Earth-sized is news.
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two of many [Re:I don't care] (Score:2)
Yes, I was trying to figure out what about this was newsworthy. Not quite hot Jupiters [universetoday.com] (more like "warm" Jupiters), but nevertheless, more than 5000 exoplanets [nasa.gov] have been found to date, so what is it about these two in particular that makes them interesting?
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... so what is it about these two in particular that makes them interesting?
Why not just read the abstract? It takes less time than writing up a comment.
The abstract does not answer the question.
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Papers and abstracts are written for that audience, not necessarily for you. If you don't find it interesting, there's nothing compelling you to carry on r
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The planets are plainly interesting to anyone who has spent the thick end of a decade obtaining data, checking it, calculating it's consequences and trying to understand if the recorded data (plus-or-minus it's error bars) is compatible with a stable planetary system,
Single planets in a single-star system are stable regardless of mass. That was easy.
or if there's something else (say, an out-of-transit region planet) hiding in the data.
Not addressed in the abstract.
Papers and abstracts are written for that audience, not necessarily for you. If you don't find it interesting, there's nothing compelling you to carry on reading.
maybe I misphrased the question. What is more interesting about these particular planets than about the other five thousand one hundred and eight exoplanets found (as of July 1)?
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You don't know that it's a single planet system until you've looked, closely, for transit timing variations in the existing data (and any additional data you collect).
They probably don't address whether the planets clouds taste of strawberry ice cream or incinerated human flesh either. TTVs are certainly something that gets looked for in every transit data set - that's how a lot of the multiple
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What part of "not addressed in the paper" are you missing here?
You're saying "for all we know they may be interesting for lots and lots of reasons that aren't known because they aren't in the paper."
Of course. Post it to slashdot when there is something interesting.
...
Nothing much, AFAICT. So, your beef is with the editors.
Correct.
Uh oh, I've read Thomas Hardy (Score:2)
Things don't end so well for TESS...
Headline (Score:2)
688K (Score:3)
688K is 415C
Re: 688K (Score:2)
And 906K is 633C
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I went through that list of properties going "Mercury-like", "Mercury-like", "Mercury-like" ... And indeed a surface temperature of 688K isn't that far from Mercury-like.
How much would a surface temperature like that affect the composition of the upper atmosphere? You'd expect the mean-free path of the hydrogen and helium to be increased. Maybe some photolytic reactions to free H/ He from whatever compounds it's in. Trouble is, that would create a density inversion in the upper atmosphere,
If we ever encounter aliens (Score:1)