L dwarf stars

[alokmohan]

Can any body explain what is Ldwarf star?

 

[harmonicaman]

The L-Dwarf class of celestial objects is a very low mass star. It is precariously close to the theoretical minimal fusion limit, (which is about 8 percent of our Sun's mass). Anything smaller than this falls into the Brown Dwarf catagory. <br /><br />This newly discovered class of star bridges the gap between larger stars and the Brown Dwarf, which isn't massive enough to undergo fussion..<br />

 

[derekmcd]

A quick google search: L-type Dwarf Star<br /><br />A quick summary is that it is a low mass star bordering at the minimum mass required for fusion. Only slightly larger than a brown dwarf which are about the size of Jupiter. <div class="Discussion_UserSignature"> <div> </div><br /><div><span style="color:#0000ff" class="Apple-style-span">"If something's hard to do, then it's not worth doing." - Homer Simpson</span></div> </div>

 

[derekmcd]

Must have googled the same site, eh? <div class="Discussion_UserSignature"> <div> </div><br /><div><span style="color:#0000ff" class="Apple-style-span">"If something's hard to do, then it's not worth doing." - Homer Simpson</span></div> </div>

 

[3488]

I understand that at some point Jupiter was to be considered to be a T Type brown dwarf. I have tried to find out more, but there does not appear to be any new stuff.<br /><br />With the arguments going on about what constitutes a planet at the bottom end of the planetary ladder (Should Pluto remain a planet, should 2003 UB313 be classed as a planet), we will now have an argument what constitutes the UPPER limit (Should Jupiter remain a planet, or is it a brown dwarf star)? I always thought a star had to be able to produce its own energy by Thermonuclear reactions (bottom limit about 80 Jupiter masses or 8% the mass of the Sun). <br /><br />Jupiter is about 0.1% the mass of the Sun & does not shine through Thermonuclear reactions, although Jupiter resembles the Sun, Barnards Star, Proxima Centauri, Vega, Altair, Procyon, Sirius, etc, more than the Earth in chemical makeup. <br /><br />The boundaries blur yet further as to what is or is not a planet!!!<br /><br /> I think that if Jupiter is to be accepted as a T Type brown dwarf, then I can see Saturn eventually being promoted too.<br /><br />This I think that this will rumble on & on. <br /><br />Links below are more info on Brown Dwarfs generally.<br /><br />http://astron.berkeley.edu/~stars/bdwarfs/<br /><br />http://www.spacetelescope.org/news/html/heic0410.html<br /><br />http://www.newscientist.com/article.ns?id=dn6977<br /><br />http://www.atlasoftheuniverse.com/20lys.html<br /><br />http://www.hs.uni-hamburg.de/cs13/abstracts.html<br /><br />http://www.solstation.com/stars/eps-indi.h <div class="Discussion_UserSignature"> <p><font color="#000080">"I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before".</font> <em><strong><font color="#000000">Linda Morabito </font></strong><font color="#800000">on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.</font></em></p><p><font size="1" color="#000080">http://www.launchphotography.com/</font><br /><br /><font size="1" color="#000080">http://anthmartian.googlepages.com/thisislandearth</font></p><p><font size="1" color="#000080">http://web.me.com/meridianijournal</font></p> </div>

 

[alokmohan]

So nice of you to enlighten.As I understand it is elder brother of brown dwarf.

 

[search]

No new stuff because Jupiter (and Saturn) fall below enough of the required parameters but read this:<br /><br />http://www.physorg.com/news62833505.html<br /><br />

 

[alokmohan]

No L dwarf in the link?ML: 1,500 - 2,000 K - Stars with masses insufficient to run the regular hydrogen fusion process (brown dwarfs). Class L stars contain lithium which is rapidly destroyed in hotter stars.The last lines are from Mike.<br /><br />ike has given some clue.

 

[alokmohan]

It appears http://www.astronomy.com/asy/default.aspxLdwarfs are brown dwarfs ,not stars