Divisibility sequence: Difference between revisions

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→Examples: Added Lucas sequences as examples of divisibility sequences that generalize the Fibonacci sequence
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{{Planetbox begin
Discovering the ideal water cooler for your requires can be a challenge with so lots of possibilities out there.  Cooler Master has been off our radar for a handful of years now as its energy supplies have been simply not up to snuff. It all goes back to keeping your cooler cool, preventing ice from melting, and keeping great insulation.  As a guide for big expeditions down the Grand Canyon, I have to make confident that the coolers are receiving drained each day. One, it is not sanitary, and two, your ice will melt more rapidly if you let warm water to sit in the bottom. Use foam pads inside and outdoors of the cooler to add even more insulation. Finally, limit the number of instances you open up the cooler.<br><br>Packing coolers effectively, and having ones of good quality is integral to executing a wonderful multi-day expedition down any river. The coolers that we use are massive, in a position to hold 18 days worth of meals, and must match into the frames on our rafts. Getting water in the cooler will melt ice more quickly, which is not superior. Maintaining ice present on these extended trips is integral for our accomplishment. On extended trips, you want a cooler that is big sufficient to retailer all that meals. These coolers are for pussies.<br><br>I maintain a little white remote handle looking point that sits on the cooler shelves (rotate after in a when to see if specific areas are obtaining cooler or warmer air). I just opened my cooler in the past handful of hours just to peep and no frosting has been occurring. I think i opened my cooler a couple instances and i was rotating some fragrances to the back that i wont be wearing considerably in the upcoming warm seasons. The environmental effect of a jug-sort water cooler is pretty considerable as well.<br><br>Your cooler and your refrigerator, when it really is not turned on, use the same principles of heat transfer that a jacket, a blanket, or the insulation inside your walls use to retain heat in or out of a offered spot. This all comes down to a single, simple, and quite annoying fact about how heat behaves (annoying if your target is enjoying cold beer in the sun, that is): It flows from warmer to cooler places till the temperature of both spots equalize. Be careful with the type of ice you use.<br><br>If you enjoyed this post and you would certainly like to receive additional details concerning [http://www.bestcoolerreviewshq.com/best-cooler-for-the-money/ Bestcoolerreviewshq.Com] kindly browse through our own web-site. Though water coolers are one particular of the most generally used source everywhere but there are certain points that one should actually contemplate as a strong comparison  Finest Cooler For The Beach tool before attempting the hands upon the very same.  Interestingly, far more and far more of the individuals are now making a switch to water crocks instead of water coolers for myriad of valid factors.  Study and write critiques on Phoenix evaporative coolers.<br><br>Uncover oasis water coolers from a vast choice of Enterprise Industrial.  Oasis Water Coolers in reality the very best water coolers you can obtain. Shop by style and well known brands to come across Oasis Water Coolers in 1 uncomplicated location. Arctic Zone 38 Can Expandable Cooler - The 38 IceCOLD Expandable Cooler is smaller enough to take about anyplace. Study arctic zone coolers - Sport and Outside Evaluations and Examine arctic zone coolers - Sport and Outdoor Prices. The beverage cooler is terrible.
| name = [[Harvard Revised catalogue|HR]] 8799 e
}}
{{Planetbox image
| image = 
| caption = 
}}
{{Planetbox star
| star = [[HR 8799]]
| constell = [[Pegasus (constellation)|Pegasus]]
| RA = {{RA|23|07|28.7150}}<ref name="SIMBAD">{{SIMBAD link|HR+8799|V* V342 Peg -- Variable Star of gamma Dor type}}, entry, [[SIMBAD]].  Accessed on line November 14, 2008.</ref>
| DEC = {{DEC|+21|08|03.302}}<ref name="SIMBAD" />
| app_mag = 5.964<ref name="SIMBAD" />
| dist_ly = 129 ± 4<ref name="vanLeeuwen2007">{{cite web|url=http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=113804|title=HIP 114189|work=Hipparcos, the New Reduction|author=van Leeuwen, F.|year=2007|accessdate=2008-10-13}}</ref><ref group="note" name="calculate_distance">Computed from parallax: <math>\scriptstyle \mathrm{distance\ in\ parsecs}=\frac{1000}{\mathrm{parallax\ in\ milliarcseconds}}</math></ref>
| dist_pc = 39 ± 1<ref name="vanLeeuwen2007" /><ref group="note" name="calculate_distance" />
| class = kA5 hF0 mA5 V; λ Boo<ref name="Gray1999">{{cite journal|title=HR 8799: A Link between γ Doradus Variables and λ Bootis Stars|author=Gray, R.O. and Kaye, A.B.|year=1999|journal=[[The Astronomical Journal]]|volume=118|issue=6|pages=2993–2996|doi=10.1086/301134|bibcode=1999AJ....118.2993G}}</ref><ref name="Kaye1999">{{cite journal|title=Gamma Doradus Stars: Defining a New Class of Pulsating Variables|author=Kaye, A.B. ''et al.''|year=1999|journal=[[PASP]]|volume=111|issue=761|pages=840–844|bibcode=1999PASP..111..840K|doi=10.1086/316399|arxiv = astro-ph/9905042 }}</ref>
}}
{{Planetbox separation
| epoch =
| separation_mas = 368 ± 9<ref name=Marois2011>{{cite doi|10.1038/nature09684}}</ref>
| position_angle =
| separation = 14.5 ± 0.5, 14.8 ± 0.5 <ref name="Marois2011" /><ref name="Currie2011"/>
}}
{{Planetbox orbit
| semimajor = ~ 14.5 ± 0.5<ref name="Marois2011" /><ref group="note" name="circular_orbit">Value given assuming the planet's orbit is circular and is being observed face-on.</ref>
| semimajor_gm = ~ 2175
| period_year = ~ 50<ref name="Marois2011" /><ref group="note" name="circular_orbit" />
}}
{{Planetbox character
| mass = 7-9 <ref name="Currie2011"/>
| radius = 1.2
| temperature = 1,000 <ref name="Skemer2012"/>
}}
{{Planetbox discovery
| discovery_date = November 1, 2010 (announced)<br>November 22, 2010 (published)
| discoverers = Marois ''et al.''
| discovery_method = [[Direct imaging]]
| discovery_site = [[W.M. Keck Observatory|Keck]] and [[Gemini Observatory|Gemini<br/>observatories]] in [[Hawaii]]
| discovery_status = Published<ref name="Marois2011" />
}}
{{Planetbox catalog
| names = [[Henry Draper catalogue|HD]]&nbsp;218396&nbsp;e<ref>{{SIMBAD link|HD+218396e|HD 218396e – Extra-solar Planet Candidate}}, entry, [[SIMBAD]].  Accessed on line December 11, 2010.</ref>
}}
{{Planetbox reference
| star = HR+8799
| planet = e
| simbad = HD+218396e
}}
{{Planetbox end}}
 
'''HR 8799 e''' is a large [[exoplanet]], orbiting the star [[HR 8799]], which lies 128 lightyears from Earth. This [[gas giant]] is between 5 and 10 times the mass of [[Jupiter]],<ref name="Marois2011" /> the largest planet in our solar system. Due to their young age and high temperature all four discovered planets in the HR 8799 system are large, compared to all gas giants in the [[Solar System]].
 
==Description==
HR 8799 e is the fourth planet orbiting HR 8799 in order of discovery. It is a young, hot and massive [[gas giant]], and is fairly close to its star, lying just between the orbits of [[Saturn]] and [[Uranus]] in our solar system. The planet is still glowing red hot.<ref name="Marois2011" />
 
HR 8799 e is the innermost known planet as it orbits closer to its star than the other three known planets in this [[planetary system]]. This planet orbits at an estimated distance of 14.5 AU based on the relationship between [[angular separation]] measured by direct imaging observations and the star's distance from Earth. The estimated period of this planet if the orbit is face-on is about 50 years.<ref name="Marois2011" />
 
==Discovery==
A team of researchers lead by Christian Marois at the National Research Council's Herzberg Institute of Astrophysics identified the planet from data taken in 2009 and 2010 using the [[W.M. Keck Observatory]] in the K and L spectral bands.<ref name="Marois2011"/> They announced their findings on November 22, 2010.  A separate work reporting the detection of HR 8799 e, led by Thayne Currie and using the [[Very Large Telescope]], was made public six weeks later.<ref name="Currie2011">{{cite journal |last=Currie |first=Thayne |authorlink= |coauthors=''et al.'' |date=March 2011 |title=A Combined Subaru/VLT/MMT 1--5 Micron Study of Planets Orbiting HR 8799: Implications for Atmospheric Properties, Masses, and Formation |journal=[[The Astrophysical Journal|ApJ]] |volume=729 |issue=2|pages=128 |arxiv=1101.1973 |bibcode = 2011ApJ...729..128C }}</ref> Observations obtained since then with the [[Large Binocular Telescope]] show that HR 8799 e has a spectrum and temperature similar to HR 8799 c and d.<ref name="Skemer2012">{{cite journal |last=Skemer |first=Andrew |authorlink= |coauthors=''et al.'' |date=July 2012 |title=First Light LBT AO Images of HR 8799 bcde at 1.6 and 3.3 μm: New Discrepancies between Young Planets and Old Brown Dwarfs |journal=[[The Astrophysical Journal|ApJ]] |volume=753 |issue=1|pages=14 |arxiv=1203.2615 |bibcode = 2012ApJ...753...14S }}</ref>
 
==Spectra==
Near infrared spectroscopy from 995 to 1769 nanometers made with the Palomar Obervatory show evidence of Methane and Acetylene but no Ammonia or Carbon Dioxide.  There is currently no explanation why this planet shows strong methane absorption, but the other 3 planets in this system do not, despite all 4 planets having similar atmospheric temperatures.<ref name=Gilliland>{{cite web|first = B. R. Oppenheimer|title= Reconnaissance of the HR 8799 Exosolar System I: Near IR Spectroscopy|url=http://arxiv.org/abs/1303.2627|publisher=Cornell University|accessdate=12 March 2013}}</ref>
 
==Notes==
{{reflist|group=note}}
 
==References==
{{reflist}}
 
==External links==
*[http://www.canada.com/Newly+discovered+exoplanet+stirs+debate+planetary+systems+form/3946603/story.html#ixzz17Y8JHwKD Newly discovered exoplanet stirs debate on how planetary systems form]
 
{{HR 8799|state=collapsed}}
{{Sky|23|07|28.7150|+|21|08|03.302|129}}
 
[[Category:HR 8799]]
[[Category:Exoplanets discovered in 2010]]
[[Category:Pegasus (constellation)]]
[[Category:Gas giants]]
[[Category:Exoplanets detected by direct imaging]]

Latest revision as of 09:16, 15 August 2014

Discovering the ideal water cooler for your requires can be a challenge with so lots of possibilities out there. Cooler Master has been off our radar for a handful of years now as its energy supplies have been simply not up to snuff. It all goes back to keeping your cooler cool, preventing ice from melting, and keeping great insulation. As a guide for big expeditions down the Grand Canyon, I have to make confident that the coolers are receiving drained each day. One, it is not sanitary, and two, your ice will melt more rapidly if you let warm water to sit in the bottom. Use foam pads inside and outdoors of the cooler to add even more insulation. Finally, limit the number of instances you open up the cooler.

Packing coolers effectively, and having ones of good quality is integral to executing a wonderful multi-day expedition down any river. The coolers that we use are massive, in a position to hold 18 days worth of meals, and must match into the frames on our rafts. Getting water in the cooler will melt ice more quickly, which is not superior. Maintaining ice present on these extended trips is integral for our accomplishment. On extended trips, you want a cooler that is big sufficient to retailer all that meals. These coolers are for pussies.

I maintain a little white remote handle looking point that sits on the cooler shelves (rotate after in a when to see if specific areas are obtaining cooler or warmer air). I just opened my cooler in the past handful of hours just to peep and no frosting has been occurring. I think i opened my cooler a couple instances and i was rotating some fragrances to the back that i wont be wearing considerably in the upcoming warm seasons. The environmental effect of a jug-sort water cooler is pretty considerable as well.

Your cooler and your refrigerator, when it really is not turned on, use the same principles of heat transfer that a jacket, a blanket, or the insulation inside your walls use to retain heat in or out of a offered spot. This all comes down to a single, simple, and quite annoying fact about how heat behaves (annoying if your target is enjoying cold beer in the sun, that is): It flows from warmer to cooler places till the temperature of both spots equalize. Be careful with the type of ice you use.

If you enjoyed this post and you would certainly like to receive additional details concerning Bestcoolerreviewshq.Com kindly browse through our own web-site. Though water coolers are one particular of the most generally used source everywhere but there are certain points that one should actually contemplate as a strong comparison Finest Cooler For The Beach tool before attempting the hands upon the very same. Interestingly, far more and far more of the individuals are now making a switch to water crocks instead of water coolers for myriad of valid factors. Study and write critiques on Phoenix evaporative coolers.

Uncover oasis water coolers from a vast choice of Enterprise Industrial. Oasis Water Coolers in reality the very best water coolers you can obtain. Shop by style and well known brands to come across Oasis Water Coolers in 1 uncomplicated location. Arctic Zone 38 Can Expandable Cooler - The 38 IceCOLD Expandable Cooler is smaller enough to take about anyplace. Study arctic zone coolers - Sport and Outside Evaluations and Examine arctic zone coolers - Sport and Outdoor Prices. The beverage cooler is terrible.

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