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{{Use dmy dates|date=September 2014}}
This is a preview for the new '''MathML rendering mode''' (with SVG fallback), which is availble in production for registered users.
{{Starbox begin
| name = PSR J1719-1438
}}
{{Starbox image
| image = <!--image location (i.e. "Sunspots.png")-->
| caption = <!--caption (optional)-->
| credit = <!--credit for image if the image's use requires them (optional)-->
}}
{{Starbox observe
| epoch = [[Julian day#Alternatives|MJD]] 55411.0<ref name=bailes/><!--Epoch of observation-->
| equinox = [[J2000]]
| constell = [[Serpens]]
| pronounce = <!--Pronunciation guide-->
| ra = 17:19:10.0730(1)<ref name=bailes/> <!--Right Ascension-->
| dec = −14:38:00.96(2)<ref name=bailes/> <!--Declination-->
| appmag_v =  <!--Apparent magnitude (Johnson-Cousins V system)-->
}}
{{Starbox character
| class = [[millisecond pulsar]]<ref name=bailes/> <!--Stellar class-->
| appmag_1_passband = R<!-- Passband for first apparent magnitude (e.g., H, J, K, etc.) -->
| appmag_1 = >25.4<ref name=bailes/><!-- Value of first apparent magnitude  -->
| appmag_2_passband = g<!-- Passband for second apparent magnitude (e.g., H, J, K, etc.) -->
| appmag_2 = >24.1<ref name=bailes/><!-- Value of second apparent magnitude  -->
| appmag_3_passband = I<!-- Passband for third apparent magnitude (e.g., H, J, K, etc.) -->
| appmag_3 = >22.5<ref name=bailes/><!-- Value of third apparent magnitude  -->
| appmag_4_passband = <!-- Passband for fourth apparent magnitude (e.g., H, J, K, etc.) -->
| appmag_4 = <!-- Value of fourth apparent magnitude  -->
| appmag_5_passband = <!-- Passband for fifth apparent magnitude (e.g., H, J, K, etc.) -->
| appmag_5 = <!-- Value of fifth apparent magnitude  -->
| appmag_6_passband = <!-- Passband for sixth apparent magnitude (e.g., H, J, K, etc.) -->
| appmag_6 = <!-- Value of sixth apparent magnitude  -->
| appmag_7_passband = <!-- Passband for seventh apparent magnitude (e.g., H, J, K, etc.) -->
| appmag_7 = <!-- Value of seventh apparent magnitude  -->
| appmag_8_passband = <!-- Passband for eighth apparent magnitude (e.g., H, J, K, etc.) -->
| appmag_8 = <!-- Value of eighth apparent magnitude  -->
| r-i = <!--R-I color-->
| v-r = <!--V-R color-->
| b-v = <!--B-V color-->
| u-b = <!--U-B color-->
| j-h = <!--J-H color-->
| j-k = <!--J-K color-->
| variable = <!--Variability type-->
}}
{{Starbox astrometry
| radial_v = <!--Radial velocity (in km/sec)-->
| prop_mo_ra = <!--Proper motion (RA), μ<sub>α</sub> cos δ (in milliarcsec/yr)-->
| prop_mo_dec = <!--Proper motion (dec), μ<sub>δ</sub> (in milliarcsec/yr)-->
| parallax =  <!--Parallax (in milliarcsec)-->
| p_error = <!--Parallax error (in milliarcsec)-->
| parallax_footnote = <!--Parallax footnote-->
| dist_ly = <!--Distance (in light years)-->
| dist_pc = ~1,200<ref name=bailes/><!--Distance (in parsecs)-->
| absmag_v = <!--Absolute magnitude ([[UBV photometric system|Johnson-Cousins V system]])-->
}}
{{Starbox orbit
| reference =<ref name=bailes/><!--Reference-->
| primary = PSR J1719-1438<!--Primary name -->
| name = [[PSR J1719-1438b]]<!--Companion name-->
| period = <!--Period (in years)-->
| period_unitless = 0.090706293(2) days<!--Period (no units provided by template)-->
| axis = <!--Semimajor axis (in arcseconds)-->
| axis_unitless = <math>a_P\sin i=</math>0.001819(1) [[light second]]s<!--Semimajor axis (no units provided by template)-->
| eccentricity = <0.06 <!--Eccentricity-->
| inclination = <!--Inclination (in degrees)-->
| node = <!--Longitude of node (in degrees)-->
| periastron = [[Julian day#Alternatives|MJD]] 55411.0<!--Periastron epoch-->
| periarg = <!--Argument of periastron (in degrees), secondary -->
| periarg_primary = <!--Argument of periastron (in degrees), primary -->
| k1 = <!-- Velocity semi-amplitude (SB1, or primary in SB2), in km/s -->
| k2 = <!-- Velocity semi-amplitude (secondary in SB2), in km/s -->
}}
{{Starbox detail
| source              =  <!--[source url]-->
| mass                =  <!--Mass (in solar masses)-->
| radius              =  <!--Radius (in solar radii)-->
| gravity            =  <!--Surface gravity (given as the base 10 logarithm expressed in cgs units)-->
| luminosity          =  <!--Luminosity (in solar luminosities); prefer luminosity_bolometric or luminosity_visual-->
| luminosity_bolometric = <!--Luminosity (in solar luminosities), bolometric-->
| luminosity_visual  =  <!--Luminosity (in solar luminosities), visual (V)-->
| temperature        =  <!--Temperature (in kelvins)-->
| metal              =  <!--Metallicity (no units provided by template)-->
| rotation            =  <!--Rotation (no units provided by template)-->
| rotational_velocity =  <!--Rotational velocity (v sin i, in km/s)-->
| age                =  <!--Age (in years)-->
| age_gyr            =  <!--Age (in billions of years)-->
}}
{{Starbox catalog
| names = <!--Other catalog designations-->
}}
{{Starbox reference
| Simbad = <!--Search String-->
}}
{{Starbox end}}


'''PSR J1719-1438''' is a [[millisecond pulsar]] with a spin period of 5.8 ms located about 4000 [[light year|ly]] from Earth in the direction of [[Serpens]] Cauda,<ref name=bailes/><ref name=UniverseToday /> one minute from the border with Ophiuchus. Millisecond pulsars are generally thought to begin as normal pulsars and then spin up by accreting matter from a [[Binary star|binary]] companion.
If you would like use the '''MathML''' rendering mode, you need a wikipedia user account that can be registered here [[https://en.wikipedia.org/wiki/Special:UserLogin/signup]]
* Only registered users will be able to execute this rendering mode.
* Note: you need not enter a email address (nor any other private information). Please do not use a password that you use elsewhere.


==Diamond planet==
Registered users will be able to choose between the following three rendering modes:  
{{main|PSR J1719-1438 b}}
PSR J1719-1438 was discovered in 2011 by the High Time Resolution Survey, a [[radio astronomy]] search for astronomical objects that rapidly vary in radio brightness, such as pulsars.<ref name=bailes/> Timing measurements using the [[Parkes Telescope]] and [[Lovell Telescope]] showed that it has a low-mass companion: [[PSR J1719-1438 b]].<ref name=bailes/> The companion has a mass similar to that of [[Jupiter]], but 40% of the diameter. It orbits the pulsar with a period of 2 hours 10 minutes and 37 seconds, at a distance of around 600,000&nbsp;km (0.89 [[Solar radius|solar radii]]).<ref name=bailes/> The companion is likely the remnant of a star whose outer layers were siphoned off by the more massive pulsar. Calculations show the companion has a minimum density of 23 grams per cubic centimeter and is probably an ultra-low-mass carbon–oxygen [[white dwarf]].<ref name=bailes/>


Because the companion to PSR J1719-1438 is planet-sized, made primarily of carbon (with an unknown amount of oxygen), and very dense, it may be similar to a large diamond. In the science press, the object has been called the [[Carbon planet|"Diamond Planet"]].<ref name=UniverseToday>{{cite web|title=Star Transforms into A Diamond Planet|url=http://www.universetoday.com/88449/star-transforms-into-a-diamond-planet|work=Universe Today|accessdate=2011-08-26}}</ref><ref name=Space.com>{{cite web|title=Surprise! Alien Planet Made of Diamond Discovered|url=http://www.space.com/12731-diamond-alien-planet-discovered-neutron-star.html|work=Space.com|accessdate=2011-08-25}}</ref><ref name= MaxPlanck>{{cite web|title=A Planet made of Diamond|url=http://www.mpifr-bonn.mpg.de/public/pr/pr-pulsar-august2011-en.html|work=Max Planck Institut for Radio Astronomy|accessdate=2011-08-26}}</ref>
'''MathML'''
:<math forcemathmode="mathml">E=mc^2</math>


==A lump of QCD matter==
<!--'''PNG'''  (currently default in production)
It has been suggested in 2012 that PSR J1719-1438 b may not be the remmant of a white dwarf, but a lump of [[QCD matter|quark matter]] with a size of just 1 kilometer and the mass of Jupiter,<ref name=horvath>
:<math forcemathmode="png">E=mc^2</math>
{{cite journal|doi=10.1088/1674-4527/12/7/009|title=The nature of the companion of PSR J1719-1438: a white dwarf or an exotic object?|year=2012|last1=Horvath|first1=J. E.|journal=Research in Astronomy and Astrophysics|bibcode = 2012RAA....12..813H|volume=12|number=7|pp=813–816}}
</ref> that would have been born in the collision and merger of two previous [[quark star]]s, part of the ejected matter ending orbiting the merger remmant we see as the pulsar PSR J1719-1438.<ref name=bauswein>
{{cite journal|doi=10.1103/PhysRevLett.103.011101|title=Mass Ejection by Strange Star Mergers and Observational Implications|year=2009|last1=Bauswein|first1=A.|last2=Janka|first2=H. -T.|last3=Oechslin|first3=R.|last4=Pagliara|first4=G.|last5=Sagert|first5=I.|last6=Schaffner-Bielich|first6=J.|last7=Hohle|first7=M. M.|last8=Neuhäuser|first8=R.|journal=Physical Review Letters|bibcode = 2009PhRvL.103a1101B|volume=103|issue=1|id=011101}}
</ref>


==See also==
'''source'''
* [[EF Eridani]], a star system with a compact star and a degraded planetary-mass former star
:<math forcemathmode="source">E=mc^2</math> -->


==References==
<span style="color: red">Follow this [https://en.wikipedia.org/wiki/Special:Preferences#mw-prefsection-rendering link] to change your Math rendering settings.</span> You can also add a [https://en.wikipedia.org/wiki/Special:Preferences#mw-prefsection-rendering-skin Custom CSS] to force the MathML/SVG rendering or select different font families. See [https://www.mediawiki.org/wiki/Extension:Math#CSS_for_the_MathML_with_SVG_fallback_mode these examples].
{{reflist|colwidth=25em|refs=


<ref name=bailes>
==Demos==
{{cite journal|doi=10.1126/science.1208890|title=Transformation of a Star into a Planet in a Millisecond Pulsar Binary|year=2011|last1=Bailes|first1=M.|last2=Bates|first2=S. D.|last3=Bhalerao|first3=V.|last4=Bhat|first4=N. D. R.|last5=Burgay|first5=M.|last6=Burke-Spolaor|first6=S.|last7=d'Amico|first7=N.|last8=Johnston|first8=S.|last9=Keith|first9=M. J.|last10=Kramer|first10=M.|last11=Kulkarni|first11=S. R.|last12=Levin|first12=L.|last13=Lyne|first13=A. G.|last14=Milia|first14=S.|last15=Possenti|first15=A.|last16=Spitler|first16=L.|last17=Stappers|first17=B.|last18=Van Straten|first18=W.|journal=Science|bibcode = 2011Sci...333.1717B|pmid=21868629|volume=333|issue=6050|pages=1717–20|arxiv = 1108.5201 |display-authors=8}}
</ref>


}}
Here are some [https://commons.wikimedia.org/w/index.php?title=Special:ListFiles/Frederic.wang demos]:


{{Stars of Serpens}}


[[Category:Astronomical objects discovered in 2010]]
* accessibility:
[[Category:Millisecond pulsars]]
** Safari + VoiceOver: [https://commons.wikimedia.org/wiki/File:VoiceOver-Mac-Safari.ogv video only], [[File:Voiceover-mathml-example-1.wav|thumb|Voiceover-mathml-example-1]], [[File:Voiceover-mathml-example-2.wav|thumb|Voiceover-mathml-example-2]], [[File:Voiceover-mathml-example-3.wav|thumb|Voiceover-mathml-example-3]], [[File:Voiceover-mathml-example-4.wav|thumb|Voiceover-mathml-example-4]], [[File:Voiceover-mathml-example-5.wav|thumb|Voiceover-mathml-example-5]], [[File:Voiceover-mathml-example-6.wav|thumb|Voiceover-mathml-example-6]], [[File:Voiceover-mathml-example-7.wav|thumb|Voiceover-mathml-example-7]]
[[Category:Planetary systems]]
** [https://commons.wikimedia.org/wiki/File:MathPlayer-Audio-Windows7-InternetExplorer.ogg Internet Explorer + MathPlayer (audio)]
[[Category:Serpens (constellation)]]
** [https://commons.wikimedia.org/wiki/File:MathPlayer-SynchronizedHighlighting-WIndows7-InternetExplorer.png Internet Explorer + MathPlayer (synchronized highlighting)]
** [https://commons.wikimedia.org/wiki/File:MathPlayer-Braille-Windows7-InternetExplorer.png Internet Explorer + MathPlayer (braille)]
** NVDA+MathPlayer: [[File:Nvda-mathml-example-1.wav|thumb|Nvda-mathml-example-1]], [[File:Nvda-mathml-example-2.wav|thumb|Nvda-mathml-example-2]], [[File:Nvda-mathml-example-3.wav|thumb|Nvda-mathml-example-3]], [[File:Nvda-mathml-example-4.wav|thumb|Nvda-mathml-example-4]], [[File:Nvda-mathml-example-5.wav|thumb|Nvda-mathml-example-5]], [[File:Nvda-mathml-example-6.wav|thumb|Nvda-mathml-example-6]], [[File:Nvda-mathml-example-7.wav|thumb|Nvda-mathml-example-7]].
** Orca: There is ongoing work, but no support at all at the moment [[File:Orca-mathml-example-1.wav|thumb|Orca-mathml-example-1]], [[File:Orca-mathml-example-2.wav|thumb|Orca-mathml-example-2]], [[File:Orca-mathml-example-3.wav|thumb|Orca-mathml-example-3]], [[File:Orca-mathml-example-4.wav|thumb|Orca-mathml-example-4]], [[File:Orca-mathml-example-5.wav|thumb|Orca-mathml-example-5]], [[File:Orca-mathml-example-6.wav|thumb|Orca-mathml-example-6]], [[File:Orca-mathml-example-7.wav|thumb|Orca-mathml-example-7]].
** From our testing, ChromeVox and JAWS are not able to read the formulas generated by the MathML mode.
 
==Test pages ==
 
To test the '''MathML''', '''PNG''', and '''source''' rendering modes, please go to one of the following test pages:
*[[Displaystyle]]
*[[MathAxisAlignment]]
*[[Styling]]
*[[Linebreaking]]
*[[Unique Ids]]
*[[Help:Formula]]
 
*[[Inputtypes|Inputtypes (private Wikis only)]]
*[[Url2Image|Url2Image (private Wikis only)]]
==Bug reporting==
If you find any bugs, please report them at [https://bugzilla.wikimedia.org/enter_bug.cgi?product=MediaWiki%20extensions&component=Math&version=master&short_desc=Math-preview%20rendering%20problem Bugzilla], or write an email to math_bugs (at) ckurs (dot) de .

Latest revision as of 22:52, 15 September 2019

This is a preview for the new MathML rendering mode (with SVG fallback), which is availble in production for registered users.

If you would like use the MathML rendering mode, you need a wikipedia user account that can be registered here [[1]]

  • Only registered users will be able to execute this rendering mode.
  • Note: you need not enter a email address (nor any other private information). Please do not use a password that you use elsewhere.

Registered users will be able to choose between the following three rendering modes:

MathML

E=mc2


Follow this link to change your Math rendering settings. You can also add a Custom CSS to force the MathML/SVG rendering or select different font families. See these examples.

Demos

Here are some demos:


Test pages

To test the MathML, PNG, and source rendering modes, please go to one of the following test pages:

Bug reporting

If you find any bugs, please report them at Bugzilla, or write an email to math_bugs (at) ckurs (dot) de .

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