Sombreros
Sombreros  
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Pattern type  Oscillator  

Number of cells  50  
Bounding box  18 × 11  
Period  6  
Mod  6  
Heat  5.3  
Volatility  0.25  
Strict volatility  0.25  
Discovered by  David Buckingham  
Year of discovery  1972  
 
 
 

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Sombreros is a period6 oscillator that was found by David Buckingham in December 1972.^{[1]}^{[2]} Each half by itself is called a sombrero.
If the two sombreros are moved three cells closer to one another, the oscillator's period drops to 4 ticks and the result is just a less compact form of Achim's p4:
Period 4 variant (click above to open LifeViewer) RLE: here Plaintext: here 
Two sombreros moved two spaces closer and staggered by one space forms a period 5 oscillator called Siesta.
Siesta (click above to open LifeViewer) RLE: here Plaintext: here 
goldenratio found a 36glider synthesis of a sombreros variant^{[c 1]} in October 2020.^{[3]}
One sombrero can be supported by two eater 1s.^{[4]} The resulting oscillator is shown below, with a stator variant^{[5]} that is thinner but taller:
Stator variant of sombrero supported by two eaters^{[4]}^{[5]} (click above to open LifeViewer) Catagolue: here 
One period6 stabilisation of scrubber halves involves them each mutually stabilising with a single sombrero, and can be extended to a glidesymmetric wick.
Showing two different end stabilisations (click above to open LifeViewer) Catagolue: here 
Oscillators sharing its stator
A 37cell glidesymmetric period16 oscillator bearing all stator cells of a lone sombrero except the two at the ends of the eaters' tails was found by Dean Hickerson in 1997 or 1998.^{[6]}
(click above to open LifeViewer) Catagolue: here 
In other rules
A lone sombrero^{[7]} would function as a period6 pipsquirter if not for the births triggered by the b3q and b3y transitions when the edges have not receded in the phase of the domino's appearance. However, interestingly, when only b3q is removed (for the rule called qlife), it becomes a period9 pipsquirter^{[c 2]} with a single cell of additional clearance.
qlife p9 sombrero (click above to open LifeViewer) Catagolue: here 
References
 ↑ Robert Wainwright (March 1973). Lifeline, vol 9, page 3.
 ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
 ↑ goldenratio (October 3, 2020). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
 ↑ ^{4.0} ^{4.1} toroidalet (November 19th, 2016). Re: Oscillator Discoveries Thread (discussion thread) at the ConwayLife.com forums
 ↑ ^{5.0} ^{5.1} BlinkerSpawn (November 19th, 2016). Re: Oscillator Discoveries Thread (discussion thread) at the ConwayLife.com forums
 ↑ Dean Hickerson's "New billiard tables" oscillator collection
 ↑ Headerless RLE: 3b2ob2o$b3o3b3o$o4bo4bo$2ob2ob2ob2o$4bobo$4bobo$5bo!
External links
 Sombreros at the Life Lexicon
 50P6.9 at Heinrich Koenig's Game of Life Object Catalogs
 Sombreros at Adam P. Goucher's Catagolue
 Sombrero at Wikipedia (name origin)
 Patterns
 Oscillators with 50 cells
 Periodic objects with minimum population 50
 Patterns with 50 cells
 Patterns found by David Buckingham
 Patterns found in 1972
 Patterns that can be constructed with 37 gliders
 Patterns that can be constructed with 30 gliders
 Oscillators
 Oscillators with period 6
 Oscillators with mod 6
 Oscillators with heat 5
 Oscillators with volatility 0.25
 Oscillators with strict volatility 0.25
 Patterns with rectangular orthogonal symmetry
 Seminatural periodic objects