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Exoplanetary Scratchpad

[SysBP Img]

A binary star in Velpulca (the "little fox") consisting of an Orange Dwarf star A and a Red Dwarf B (discovered shortly after planet Ab found and orbiting perpendicular to that planet's orbit and later detected in x-rays) orbiting 216 AU away. Planet Ab (the first nearby Very Hot Jupiter, originally thought to be inflated, is 13% larger and more massive than Jupiter) is the nearest transiting Hot Jupiter (62.9 ly). This is the first exoplanet to have its temperature mapped and was nicknamed Bull's Eye for its hot spot that is significantly offset from the starward pole. 5 years later, it later became the first world to have its thermal emissions mapped in both longtitude and latitude, confirming the hot spot was near the equator. Fast winds are thought to make the temperature of the eternal day and night sides nearly identical, which were later measured to be 2km/s when the planet became the first to have its wind and weather patterns mapped. It is also the first exoplanet for which scattered light in the upper atmosphere has been detected and the second exoplanet with water detected and first with Methane and then Carbon Dioxide detected. It later was the first exoplanet whose gasses were detected from Earth-based telescopes. It was also found to spin up its star and magnetically interact with it, causing stellar storms. Massive X-class solar flares blast off much of the planet's atmosphere and may render it undetectable. Hubble found that its atmosphere was a uniform blue haze. Blue was detected by determining which wavelengths were blocked during a transit. It was also found to rain molten glass, sideways, with 7000 km/hr winds and 1000C. It became the first exoplanet whose transit was detected in X-Rays, which revealed it had a very large extended outer atmosphere, which is losing material rapidly. The star is much more magnetically active for its age, possibly due to the planet's presence. There is speculation that it could have large planet-wide auroras. It's already-known mass was measured using an atmospheric pressure method to test its viability. By studying sodium spectra, it was determined that it gets hotter with altitude.

My ThoughtsEdit

Ha, I see that this is in the "little fox" constellation. With it's nickname being "Bull's Eye", I couldn't help but thing of the cartoon fox Robin Hood. Of course, this is a prime naming candidate.

HD 189733 System Web PagesEdit

HD 189733 System ArtworkEdit

HD 189733 System In the NewsEdit

Very Hot Jupiter Discovered (Dec 2005)Edit

The nearest transiting planet which has a smaller period than most known planets was discovered by the ELODIE metallicity-biased search. It is the second transiting planet discovered bright enough to expect detailed measurements of its temperature and atmosphere to be made. It was found to have an anamolously large radius of 1.26 RJ.
http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005A%26A...444L..15B&db_key=AST&data_type=HTML&format=&high=4481e0517d32374 http://skytonight.com/news/3310756.html?showAll=y&c=y
Bad Astronomy Forum Thread

Posteriori Transit Detections (Jan 2006)Edit

Astronomers dug through archived images of HD 189744 and found several past transit events
http://adsabs.harvard.edu/abs/2006A&A...445..341H

Red Dwarf Star B Discovered (2006)Edit

(no news articles for this event)

Temperature Taken (Feb 2006)Edit

Planet b's temperature was taken by Spitzer. This is the first time infrared light has been detected from an exoplanet. http://space.newscientist.com/article/dn8761--our-closest-exoplanet-has-its-temperature-taken.html http://www.spacedaily.com/reports/Spitzer_Takes_Temperature_of_Closest_Exoplanet.html

Parameters Refined (Apr 2006)Edit

The radius (1.154 RJ) and other properties are refined, showing it does not have as anomalous radius as first thought. http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2006ApJ...650.1160B&db_key=AST&data_type=HTML&format=&high=4545eb628e16452

Spin-Orbit Alignment Measured (2006)Edit

Calculations suggest that inwards migration of Hot Jupiters generally preserves spin-orbit alignments http://www.journals.uchicago.edu/cgi-bin/resolve?id=doi:10.1086/510528&erFrom=5947546465627586021Guest

Diameter Directly Measured (Jan 2007)Edit

Planet b becomes the first exoplanet to have its diameter measured through direct means. It is found to be larger than the measurements taken when it was first discovered and the ones taken in 2006 at 1.3 Jupiter Diameters. http://www.chara.gsu.edu/CHARA/Slides/PressRelease.pdf
http://www.astronomy.com/asy/default.aspx?c=a&id=5033

Infrared Spectrum of Planet b Probed (Feb 2007)Edit

Its atmosphere was probed along with HD 209458 b's, but water was surprisingly not detected in either planet. Clouds of Silicate could be preventing its detection though.
http://www.cfa.harvard.edu/press/2007/pr200703.html
http://www.spitzer.caltech.edu/Media/releases/ssc2007-04/release.shtml http://planetary.org/news/2007/0221_Spitzer_Captures_the_Light_from_Dry.html
http://www.thecrimson.com/article.aspx?ref=517264
http://web.mit.edu/newsoffice/2007/planet.html
http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2007/02/22/nalien22.xml
http://sciencenow.sciencemag.org/cgi/content/full/2007/221/1
http://www.reuters.com/article/scienceNews/idUSN2020396420070222
http://www.orlandosentinel.com/news/custom/space/orl-mplanets2207feb22,0,4084177.story?coll=orl-news-headlines-space
http://www.nasa.gov/home/hqnews/2007/feb/HQ_0748_Spitzer.html
http://www.sciam.com/article.cfm?chanID=sa026&ref=feedburner&articleId=E57ED0A1-E7F2-99DF-330F154D9C9A7D67 http://sfgate.com/cgi-bin/article.cgi?f=/c/a/2007/05/10/MNGAPPO4TE1.DTL&type=science

Escape State Hubble Observation ProposalEdit

This is a proposal to use the HST to determine if and how much atmosphere of HD 189733 b is escaping the planet.
http://www.stsci.edu/observing/phase2-public/10869.pro

Surface Gravity Calculated (May 2007)Edit

The sureface gravity was calculated for all transiting planets. HD 189733 b has one of the larger surface gravities, thus better able to hold onto its atmosphere than some other ones, though it is hotter than most.
http://www2.warwick.ac.uk/newsandevents/pressreleases/several_jupiter_sized/

Temperature Map Shows Heat Distributed Efficiently (May 2007)Edit

A temperature map determined that its night and day side hemispheres had only slightly different temperatures, showing that its atmosphere was efficient at transporting heat.
http://fr.arxiv.org/abs/0705.0993
http://www.cfa.harvard.edu/press/2007/pr200713.html
HD 188753 b temperature map - Extrasolar Visions BBS Thread http://www.sciam.com/article.cfm?articleID=717C56A4-E7F2-99DF-3BF77FF1BF29E7D3&chanID=sa007 http://uanews.org/cgi-bin/WebObjects/UANews.woa/35/wa/SRStoryDetails?ArticleID=13872 http://news.nationalgeographic.com/news/2007/05/070509-planet-map.html http://www.upi.com/NewsTrack/Science/2007/05/09/nasa_creates_first_exoplanet_weather_map/ http://www.space.com/scienceastronomy/070509_planet_map.html
http://www.nature.com/news/2007/070508/full/070508-6.html

Water Positively Detected (Jul 2007)Edit

http://news.bbc.co.uk/2/hi/science/nature/6292076.stm
http://space.newscientist.com/article/mg19526125.200-water-vapour-detected-on-alien-world.html http://www.reuters.com/article/scienceNews/idUSL1164290820070711
http://www.space.com/scienceastronomy/070711_water_planet.html
http://news.yahoo.com/s/afp/20070711/sc_afp/spaceastronomy_070711175803;_ylt=AlAhtvDHls4UHbx1zMj_V4vlmlUA http://sciencenow.sciencemag.org/cgi/content/full/2007/711/2
http://news.independent.co.uk/sci_tech/article2758835.ece
http://www.timesonline.co.uk/tol/news/uk/science/article2062495.ece http://www.sciam.com/article.cfm?articleID=B66E323B-E7F2-99DF-36D284B02192381C&chanID=sa007 http://news.nationalgeographic.com/news/2007/07/070711-water-jupiter.html http://cbs2.com/local/local_story_192140205.html
http://www.esa.int/esaCP/SEMBDZI2O3F_index_0.html
http://www.eurekalert.org/pub_releases/2007-07/ucl-sft070907.php

No Rings or Moons Detected (Jul 2007)Edit

http://fr.arxiv.org/abs/0707.1940

Haze Detected, Sunset Visualized (Dec 2007)Edit

http://cosmiclog.msnbc.msn.com/archive/2007/12/11/510640.aspx http://www.spacetelescope.org/news/html/heic0720.html http://www.skyandtelescope.com/news/12310496.html http://www.space.com/scienceastronomy/071211-hazy-exoplanet.html

Scattered Light Detected (Dec 2007)Edit

http://www.physorg.com/news117897716.html

First Exoplanet with Methane Detected (Feb 2008)Edit

http://fr.arxiv.org/abs/0802.1030
http://www.extrasolar.net/forums/viewtopic.php?t=1733&highlight=&sid=beacd78fa683a692bec800371782ddcf http://space.newscientist.com/article/dn13303-organic-molecules-found-on-alien-world-for-first-time.html

New Weather Model Developed (Oct 2008)Edit

http://www.space.com/scienceastronomy/081020-mm-exoplanet-weather.html

First Exoplanet with Carbon Dioxide Detected (Nov 2008)Edit

Exoplanetary Gas Spotted From Earth-Based Telescope For First Time (Feb 2010)Edit

Magnetic Explanation for Inflated Hot Jupiters (Feb 2010)Edit

Global Storm (Sep 2010)Edit

Planet Spins its Star (Jan 2011)Edit

Planet Engulfed in Uniform Blue Haze (Jul 2011)Edit

Thermal Map of Longtitude and Latitude Created (Feb 2012)Edit

Planet Hit With Massive Solar Flares (Jun 2012)Edit

Found to be Blue and Rains Molten Glass (Jul 2013)Edit

X-Ray Transit (Aug 2013)Edit

Used as a Test for Atmospheric Mass Determination Technique (Dec 2013)Edit

More Precise Measurements Still Yield Less Water Than Expected (2014)Edit

See also HD 189733 System, HD 209458 System, WASP-12 System

Stormy at High Altitudes (2015)Edit

Winds Measured and Mapped (Nov 2015)Edit

Hubble Observes 10 Hot Jupiters (Dec 2015)Edit

See WASP-12 System, WASP-6 System, WASP-31 System, WASP-33 System, HD 189733 System, HAT-P-12 System, WASP-17 System, WASP-19 System, HAT-P-1 System, HD 209458 System

See AlsoEdit

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