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Direct Image of an Exoplanet

07/31/2021 10:14 AM

I've yet to locate the original report but I will continue to look. Extremetech web magazine reports that astronomers from the University of Hawaii have imaged a massive planet, COCONUTS2-B, just 35 lightyears from us.

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#1

Re: Direct image of an exoplanet

07/31/2021 10:42 AM
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#3
In reply to #1

Re: Direct image of an exoplanet

07/31/2021 1:44 PM

Excellent!

Thanks, sue.

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#4
In reply to #3

Re: Direct image of an exoplanet

08/01/2021 4:56 AM

Don't use that word! There may be a lawyer in the house!

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#7
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Re: Direct image of an exoplanet

08/01/2021 11:22 AM

Why shouldn't I thank sue?

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#9
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Re: Direct image of an exoplanet

08/02/2021 1:17 AM

He's saying it may result in a law suit.

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#10
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Re: Direct image of an exoplanet

08/02/2021 2:56 AM

Oh! You meant Sue,a proper noun.

Excuse me Sir,and you too,Sue.

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#12
In reply to #10

Re: Direct image of an exoplanet

08/03/2021 7:05 AM

The moral of this story is always to use a comma before the vocative and a full-stop/period before a new sentence containing a one-word verb. Capitalisation/capitalization also has its merits.

"Grammar is the difference between knowing your sh!t and knowing you're sh!t." - Anon.

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#2

Re: Direct Image of an Exoplanet

07/31/2021 1:41 PM

Here is some information:

"We present the identification of the COCONUTS-2 system, composed of the M3 dwarf L 34-26 and the T9 dwarf WISEPA J075108.79−763449.6. Given their common proper motions and parallaxes, these two field objects constitute a physically bound pair with a projected separation of 594" (6471 au). The primary star COCONUTS-2A has strong stellar activity (Hα, X-ray, and UV emission) and is rapidly rotating (Prot=2.83 days), from which we estimate an age of 150-800 Myr. Comparing equatorial rotational velocity derived from the TESS light curve to spectroscopic vsini, we find COCONUTS-2A has a nearly edge-on inclination. The wide exoplanet COCONUTS-2b has an effective temperature of Teff=434±9 K, a surface gravity of logg=4.11+0.11−0.18 dex, and a mass of M=6.3+1.5−1.9 MJup based on hot-start evolutionary models, leading to a 0.016+0.004−0.005 mass ratio for the COCONUTS-2 system. COCONUTS-2b is the second coldest (after WD 0806−661B) and the second widest (after TYC 9486-927-1 b) exoplanet imaged to date. Comparison of COCONUTS-2b's infrared photometry with ultracool model atmospheres suggests the presence of both condensate clouds and non-equilibrium chemistry in its photosphere. Similar to 51 Eri b, COCONUTS-2b has a sufficiently low luminosity (log(Lbol/L⊙)=−6.384±0.028 dex) to be consistent with the cold-start process that may form gas-giant (exo)planets, though its large separation means such formation would not have occurred in situ. Finally, at a distance of 10.9 pc, COCONUTS-2b is the nearest imaged exoplanet to Earth known to date."

[2107.02805] The Second Discovery from the COol Companions ON Ultrawide orbiTS (COCONUTS) Program: A Cold Wide-Orbit Exoplanet around a Young Field M Dwarf at 10.9 pc (arxiv.org)

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#5
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Re: Direct Image of an Exoplanet

08/01/2021 10:07 AM

So what is exactly being stated here. Not being an astrophysicist this is all just Coconuts x 2 to most people. Probably aptly named. Shall we book with Branson/Bezos to go and look at it or shall we inhabit Coconuts and mess it up like earth?

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#6
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Re: Direct Image of an Exoplanet

08/01/2021 11:21 AM

If you read the Extremetech article (https://www.extremetech.com/extreme/325276-astronomers-directly-image-planet-just-35-light-years-away) you should understand that the red bars point to an exoplanet. (An exoplanet is a planet not orbiting our sun.) This exoplanet orbits the star between the two blue bars.

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#8
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Re: Direct Image of an Exoplanet

08/01/2021 1:20 PM

35 lightyears is a bit far to go on today's technology. Better take along a lot of reading material. The gravity and temperature are a tad high for my likes. Its sun is a long way away and birthdays would be a long time apart (1.1 million earth years).

AFAIK, visual detection of an exoplanet is usually hampered by the glare of its sun. In this case, the planet and star were far separated and only associated with each other by a common proper motion and parallax.

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#11
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Re: Direct Image of an Exoplanet

08/02/2021 3:08 AM

35 LY's is indeed too far.

The first spacecraft to start the journey will never make it.

It will be intercepted on it's way by the next generation of faster craft,and this one also will be intercepted by the next generation,etc. until the speed limit is reached,which we may learn is not C.

But C is ok for present calculations and practical purposes.

We must crawl before we walk.

Entangled particles were called "Spooky action at a distance." by A.E.

Perhaps faster than light travel will be called "Spooky travel at a distance?"

They are discovering how to entangle greater and greater numbers of entangled particles nearly every day,even in the Macro-Sized world.

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#13
In reply to #8

Re: Direct Image of an Exoplanet

08/04/2021 7:45 PM

Any time-lapse fotos available, upon which to highlight the relative motions ?

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