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skywalker66
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30 Sep 2017 23:18

skywalker66 wrote:
Source of the post CORRECTED PARAMETERS FOR KEPLER-974 / KOI-1843 SYSTEM

I've moved your post here, where it belongs.


CORRECTED PARAMETERS FOR KEPLER-974 / KOI-1843 SYSTEM

While researching the subject on extremely close orbiting terra exoplanets, I have come across the incorrect parameters in the stellar system Kepler-974 / KOI-1843 someone had wrote in SE 0.980 over one year ago. Quite a surprise. Go take a look for sure. Incorrect parameters in the Kepler-974 / KOI-1843 are as the following:
Kepler-974 b:  Discovery year= 2016; Semimajor Axis= 5,878,235 km; Period= 4.194 days in orbit closest to star
KOI-1843.01:  Discovery year= 2013; Semimajor Axis= 5,909,121 km; Period= 4 hours 14 minutes 43 seconds
KOI-1843.02: Discovery year= omitted; Semimajor Axis= 7,794,055 km; Period= 6.356 days
In this old version, Kepler-974 b and KOI-1843.01 are orbiting too close in chaotic orbits.
I made corrected parameters for Kepler-974 / KOI-1843 exoplanets as the following:
KOI-1843.03: Discovery year= 2012; Semimajor Axis= 720,000 km; Period= 4 hours 14 minutes 43 seconds closest to star
Kepler-974 b: Discovery year= 2013; Semimajor Axis= 5,909,121 km; Period= 4.194 days
KOI-1843.02: Discovery year= 2013; Semimajor Axis= 7,794,055 km; Period= 6.356 days
In this new version, orbits of all three exoplanets are put in correct order. I have added a comet-like tail for innermost planet which orbits very close to primary star. I fine-tuned their orbital parameters accordingly to some sources on the Internet. The new script goes into addons/catalogs/planets
Kepler-974.sc
(17.94 KiB) Downloaded 15 times


KOI-1843.01 is designed as Kepler-974 b on https://exoplanetarchive.ipac.caltech.e ... Table.html and the data for KOI-1843.03 can be found on https://www.openexoplanetcatalogue.com/ ... I-1843.03/  So the discovery year for Kepler-974 b came from one website (https://www.openexoplanetcatalogue.com/ ... Kepler-974 b/) and for KOI-1843.03 came from another website (https://www.space.com/22429-alien-plane ... -iron.html). The experts believe that only one reason why KOI-1843.03 withstand the extreme strong tidal forces just below the Roche Limit of primary star is because it is made most of iron. They wrote an article "The Roche Limit For Close-Orbiting Planets: Minimum Density, Composition Constraints, And Application To The 4.2 Hour Planet KOI 1843.03," on https://iopscience.iop.org/article/10.1 ... 1/L15/meta

Previous record holders were KOI-55 b (Kepler-70) terra with a 6-hour period and Kepler-78 b terra with a 8.5-hour period, all of which can be found on SE 0.980. KOI-1843.03 terra with a 4.25-hour period is record holder. Astronomers has recently found a hot rocky-iron terra planet orbiting close to EPIC 228813918 which falls in second place behind, with a 4.3-hour period (see reference on https://phys.org/news/2017-07-astronome ... bital.html). Only trouble is that I cannot find the stellar system EPIC 228813918 and its exoplanet on SE 0.980.
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05 Oct 2017 12:17

IONIZED PLASMA TORI AROUND WASP-12 B HINTS AT A POSSIBLE EXOMOON?

In 2008 astronomers discovered a extrasolar planet WASP-12 b revolving around a solar-type star 800 light-years from our Solar System. They determined it was a Hot Jupiter with Mass 1.41 times and Radius 1.74 times that of Jupiter, with a tight orbit about 5.8 million kilometers above the primary star's surface in a period of 26 hours 11 minutes. The gaseous planet is so close to WASP-12 that the star's tidal forces are distorting it into an egg shape and pulling away its atmosphere at a rate of about 189 quadrillion tons (1 x 10e7 Jupiter Mass) a year. This so-called "tidal heating," and the proximity of the planet to its star, combine to bring the surface temperature to more than 2,200 degrees Celsius. In September 2017, Hubble Space Telescope was able to confirm the observations that WASP-12 b absorbs, instead of reflects, at least 94% of the light that shines on its surface. As a result, the exoplanet has been described as "black as asphalt" and as a "pitch black" Hot Jupiter with albedo of 0.064 (our Moon has albedo of 0.12). However, WASP-12 b is not the darkest known exoplanet- that award goes to Kepler 1 / TrES-2 b, another Hot Jupiter with albedo of 0.0136 (https://www.theregister.co.uk/2017/09/1 ... _exoplanet). For few years they thought that WASP-12 b was carbon-rich because of measured C/O ratio twice that of solar valve. This particular observation, however, was criticized for careless analysis of spectral light coming from WASP-12's two red dwarf companions which orbit close to it few light-years distant (on the website of https://astrobites.org/2012/10/19/wasp- ... -after-all). And they assumed that a portion of WASP-12 b's atmosphere was lost by thermal swelling and gas drag, pulled toward the star to form a hot gas ring around the star, rather than into a cometary tail, with a greater chance of disappearing in 10 million years. However, there is a greater possibility that planet can retain its atmosphere gases for several billion years by being protected with a supersonic shock wave it sets up ahead in its tight orbit around the star ("Hottest Known Planet May Use Shock Wave To Save Atmosphere" on https:// www.space.com/11427-hot-alien-planet-wa ... kwave.html). Finally, Russian astronomers suspected a possible exomoon by their analysis of periodic drips in light from WASP-12 b and then some time later, a team of Arizona University astronomers observed the Hubble Space Telescope's transit timing of drips from ionized gaseous torus of excited magnesium and calcium from both HD 189733 b and WASP-12 b that they were able to make model prediction ("Transit Of Exomoon Plasma Tori: New Diagnosis" on https://iopscience.iop.org/article/10.1 ... /785/2/L30). WASP-12 b's exomoon orbits at 6 Radius planet with a plasma torus and a retrograde orbit, and its mass is estimated to be between 0.57 - 6.40 Earth Mass. I had worked on making the orbital parameters of such exomoon and choose the minimum mass of 0.6 Earth Mass for two days- using the following: Earth Mass= 5.9736e24 kg; Jupiter's Mass= 1.8989e27 kg (318 Earth Mass); and WASP-12 b's Mass= 2.66872372e27 kg (446.75 Earth Mass). WASP-12b exomoon Mass= 3.60769598e24 kg (0.60394 Earth Mass). So Exomoon + Planet= Total Mass 2.67233142e27 kg. WASP-12 b's jovian Radius is 1.2411e8 m and its exomoon orbit is 7.4466e8 m (6 R planet) or about 744,660 kilometers. Thus orbital distance + planetary radius= 8.6877e8 m. Using the Kepler's 3rd Law Ultra Calculator online on www.1728.org/kepler3a.htm. Therefore,
*Terra bI, Superearth, 8.6877e8 m, 2.67233142e27 kg= period 3.8808 days or 0.010625 year

Early in the planetary formation almost more than 2 billion years ago, a large Jovian planet made inward migration towards the star WASP-12 and captured a rocky Super Earth into a retrograde orbit which became a satellite- very much like Neptune's giant moon Triton. Both objects experienced extreme tidal heating as they parked into a tight orbit around the star. Interesting thing is that the exomoon makes one retrograde revolution around the planet once, while the planet makes 3.5 prograde revolutions around the star. Intense solar wind and heat blew comet-like gases from both objects- in very compacted dance as viewed from the star's north pole in Space Engine. WASP-12 b exomoon is more like "Supergiant Io"- with extremely hot volcanoes spewing evaporated rock and metal into space and onto the giant planet's atmosphere closeby. Its crust gets pulled apart FOUR TIMES in its single revolution period- and almost fractured through which magma may flow. The ionized plasma torus has ions of +Ti, +Al, +Sn, +Mg, +Ca, +V, +I, +Si, +C and +S, with traces of water and hydrocarbons. The WASP-12 System can demonstrate what happens with the "Grand Tack Event" repented in many exoplanetary systems, in four major scenarios as the following:
A.) Solar System: One large Jovian planet forms and migrates inward into the inner Asteroid Belt where it slingshot thousands of large planetsimals around and demonlish all Super Earths in titanic collisions, before being pulled by second Jovian planet back into the outer zone. Terrestrial planets formed out of demolition debris belt.
B.) 1SWASP J1407 System: One large Jovian planet forms and migrates inward into the inner Asteroid Belt, but encounters another smaller Jovian Planet which tipped it over. In the process, it captures more of planetesimals and debris into a larger ring disk which later formed the large exomoons. No Terrestrial planets were formed in the inner zone due to lack of debris.
C.) WASP-12 System: One large Jovian planet forms and migrates inward into the inner Asteroid Belt where it slingshot the large planetesimals and demolish most but not all of Super Earths as before in Scenario A. It captures one of Super Earths or Hot Neptunes as a satellite into a retrograde orbit on its inward journey to the star. One large Terrestrial planet or none at all may form out of demolition debris belt after the Jovian's passage in the inner zone.
D.) Upsilon Andromedae System: One large Jovian planet forms and migrates inward into the inner Asteroid Belt, but it finds much less planetesimals there on late arrival as most of such material has accreted into Super Earths or Hot Neptunes. Instead, it throws them into the chaotic orbits out of the original plane or ecliptic on its inward migration. No Terrestrial planets were formed in the inner zone.

You may put WASP-12 b.Sc into the SE 0.980's subfold addons/catalogs/planets
scr00037.jpg


One screenshot sample of WASP-12 b Jovian planet with its exomoon
scr00037.jpg
 
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WASP-12 b.sc
(11.26 KiB) Downloaded 12 times
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skywalker66
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COMMUNITY ADDON: Exoplanets

09 Oct 2017 15:03

skywalker66 wrote:
Source of the post IONIZED PLASMA TORI AROUND WASP-12 B      "TORI" should be spelled "TORUS."  My apologies.
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COMMUNITY ADDON: Exoplanets

16 Oct 2017 06:59

Some new Exoplanets
// Filename: SomeNewExoStars.sc
// JackDole 2017.10.16 15:25:40

// Put in 'addons\catalogs\stars'

//------------------------------------------------------------------------------

// https://en.wikipedia.org/wiki/FL_Lyrae
StarBarycenter "FL Lyrae/FL Lyr/BD+46° 2641/HD 179890/HIP 94335/KIC 9641031/SAO 48190"
{
    RA      19 12 04.86170
    Dec     46 19 26.8632
    Dist    130
    
    Class   "G0 V"
    AppMagn 9.36
}


// http://exoplanet.eu/catalog/ogle-2017-blg-0173/
Star "OGLE-2017-BLG-0173"
{
    RA      17 51 53.0
    Dec     -29 16 17
    Dist    4700.0      // (-1780 +1460)
    
    MassSol     0.417   // (-024 +0.4)
}


// http://exoplanet.eu/catalog/gj_3942_b/
// http://simbad.u-strasbg.fr/simbad/sim-id?Ident=GJ+3942&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id
Star "GJ 3942/HIP 79126"
{
    RA      16 09 03.1408
    Dec     52 56 37.958
    Dist    16.963528
    
    Class   "M0.5 V"
    
    MassSol     0.63
    RadSol      0.61
    AppMagn     10.0
    
    Teff    3867.0
    FeH     -0.04
}


// http://simbad.u-strasbg.fr/simbad/sim-id?Ident=GJ+9827&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id
// http://exoplanet.eu/catalog/gj_9827_b/
Star "GJ 9827/BD-02 5958/HIP 115752"
{
    RA      23 27 04.83647
    Dec     -01 17 10.5816
    Dist    30.3214069
    
    Class   "K6 V"
    
    MassSol     0.659
    RadSol      0.651
    AppMagn     10.4
    
    Teff    4255.0
    FeH     -0.28
}


// https://arxiv.org/pdf/1709.01025.pdf
// http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=LP%20358-499
Star "LP 358-499/EPIC 247887989/2MASS J04403562+2500361"
{
    RA      04 40 35.63
    Dec     25 00 36.1
    Dist    80
    
    Class   "M1 V"
    
    MassSol     0.52
    RadSol      0.49
    AppMagn     13.996
    
    Teff    3644.0
}

//------------------------------------------------------------------------------

// Filename: SomeNewExoPlanets.sc
// JackDole 2017.10.16 15:28:59

// Put in 'addons\catalogs\planets'

//------------------------------------------------------------------------------

// https://en.wikipedia.org/wiki/FL_Lyrae
Star "FL Lyr A"
{
    ParentBody  "FL Lyr"
    Class       "F8"
    
    RadSol      1.283
    MassSol     1.218
    
    Lum         2.17
    AbsMagn     3.84
    
    Teff        6363
    FeH         -0.34
    Age         2.29
    
    Orbit
    {
        Period          0.011927177421067
        Inclination     89.0    // Estimated
        Eccentricity    0.0     // n/a
        MeanAnomaly     0.0     // n/a
        AscendingNode   0.0     // n/a
        ArgOfPericen    0.0     // n/a
        RefPlane        "Extrasolar"
    }
}

Star "FL Lyr B"
{
    ParentBody  "FL Lyr"
    Class       "G8"
    
    RadSol      0.958
    MassSol     0.963
    
    Lum         0.65
    AbsMagn     5.30
    
    Teff        5239
    
    Orbit
    {
        Period          0.011927177421067
        Inclination     89.0    // Estimated
        Eccentricity    0.0     // n/a
        MeanAnomaly     0.0     // n/a
        AscendingNode   0.0     // n/a
        ArgOfPericen    180     // n/a
        RefPlane        "Extrasolar"
    }
}

Planet "FL Lyr b"
{
    ParentBody  "FL Lyr"
    
    Mass        2862.59542
    Msini       2862.59542
 
    DiscMethod  "Pulsar"
    DiscDate    "2015"
    Updated     "2017.10.11"
    
    Orbit
    {
        Period      12.046801
        Inclination     89.0    // Estimated
    }
}


// http://exoplanet.eu/catalog/ogle-2017-blg-0173/
Planet "OGLE-2017-BLG-0173 b"
{
    ParentBody  "OGLE-2017-BLG-0173"
    
    Mass        2888.040712     //  ( -5.7 +10.85 MJ )
 
    DiscMethod  "MicroLens"
    DiscDate    "2017"
    Updated     "2017.09.26"
    
    Orbit
    {
        SemiMajorAxis   3.75    // (+- 1.67)
    }
}


// http://exoplanet.eu/catalog/gj_3942_b/
Planet "GJ 3942 b"
{
    ParentBody  "GJ 3942"
    
    Mass        7.15648855
    Msini       7.15648855
    Radius      15728.240
    
    DiscMethod  "RadVel"
    DiscDate    "2017"
    Updated     "2017.09.21"
    
    Orbit
    {
        SemiMajorAxis   0.0608
        Period          0.01890526
        Eccentricity     0.121
        ArgOfPericen    112.7
    }
}


// http://exoplanet.eu/catalog/gj_9827_b/
Planet "GJ 9827 b"
{
    ParentBody  "GJ 9827"
    
    Mass        4.2620865
    Radius      10437.832
    
    DiscMethod  "Transit"
    DiscDate    "2017"
    Updated     "2017.09.08"
    
    Orbit
    {
        SemiMajorAxis   0.02
        Period          0.00331
        Inclination     85.8
    }
}

// http://exoplanet.eu/catalog/gj_9827_c/
Planet "GJ 9827 c"
{
    ParentBody  "GJ 9827"
    
    Mass        2.63040712
    Radius      8221.580
    
    DiscMethod  "Transit"
    DiscDate    "2017"
    Updated     "2017.09.08"
    
    Orbit
    {
        SemiMajorAxis   0.042
        Period          0.00998795
        Inclination     87.8
    }
}

// http://exoplanet.eu/catalog/gj_9827_d/
Planet "GJ 9827 d"
{
    ParentBody  "GJ 9827"
    
    Mass        5.31170483
    Radius      13297.512
    
    DiscMethod  "Transit"
    DiscDate    "2017"
    Updated     "2017.09.08"
    
    Orbit
    {
        SemiMajorAxis   0.06
        Period          0.016979
        Inclination     87.39
    }
}


// http://exoplanet.eu/catalog/lp_358-499_b/
// https://arxiv.org/pdf/1709.01025.pdf
Planet "LP 358-499 b"
{
    ParentBody  "LP 358-499"
    
    Mass        1.86068702
    Radius      8791.98
    
    DiscMethod  "Transit"
    DiscDate    "2017"
    Updated     "2017.09.05"
    
    Orbit
    {
        SemiMajorAxis   0.0333
        Period          0.00840949
        Inclination     87.36
    }
}

// http://exoplanet.eu/catalog/lp_358-499_c/
// https://arxiv.org/pdf/1709.01025.pdf
Planet "LP 358-499 c"
{
    ParentBody  "LP 358-499"
    
    Radius      9938.76
    
    DiscMethod  "Transit"
    DiscDate    "2017"
    Updated     "2017.09.05"
    
    Orbit
    {
        SemiMajorAxis   0.0452
        Period          0.01332787
        Inclination     88.44
    }
}

// http://exoplanet.eu/catalog/lp_358-499_d/
// https://arxiv.org/pdf/1709.01025.pdf
Planet "LP 358-499 d"
{
    ParentBody  "LP 358-499"
    
    Radius      13506.52
    
    DiscMethod  "Transit"
    DiscDate    "2017"
    Updated     "2017.09.05"
    
    Orbit
    {
        SemiMajorAxis   0.078
        Period          0.03018381
        Inclination     89.36
    }
}

//------------------------------------------------------------------------------

SomeNewExoStars.sc
(1.93 KiB) Downloaded 10 times
(Put in 'addons\catalogs\stars'
SomeNewExoPlanets.sc
(4.74 KiB) Downloaded 9 times
(Put in 'addons\catalogs\planets'

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