Graphite Study of a Brown Dwarf
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  littlewhitecat

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Posted: 2010-November-08 at 8:21pm | IP Logged Quote littlewhitecat



This a piece that I completed recently and would really like an opinion on. The dwarf is magenta because of this - 

http://spider.ipac.caltech.edu/staff/davy/2mass/science/comp arison.html

The strange green thing on the pole is supposed to be an aurora I'm not at all happy with it.
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  Augustus

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Posted: 2010-November-08 at 9:49pm | IP Logged Quote Augustus

Absolutely beautiful starfield. I can't believe you did
this without computer help... that totally goes against
everything I've ever known

You have a tricky subject here - since no one has ever
seen a brown dwarf, it would be totally
unrecognizable to almost anyone. Given the link you
provided, however, I would say this is an excellent
rendition. My only question is, why is there a crescent
of the star light up? Is it part of a binary system (I
see what could be the other star in about the right
direction)? I feel like the albedo of a brown dwarf
would be very low, and that sort of sharp glow
wouldn't.

However, from a strictly artistic point of view, I'm very
impressed. Again, the star field is gorgeous, and
despite the limited content, there is most definitely a
good sense of depth.

Can't wait to see more from you!
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  littlewhitecat

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Posted: 2010-November-09 at 8:03am | IP Logged Quote littlewhitecat

Thanks  I've been trying to track down as many sources of information on brown dwarfs as possible. Sometimes they are conflicting though. I had found info (and pictures) which suggested that it would be possible for brown dwarfs to have highly reflective clouds  of methane I think. I think it would be very interesting to try producing one that was less reflective.

I think I need to improve my depiction of a closer star though. It's not obvious in this image.

I used a toothbrush to splatter on masking fluid for the star field. If you're careful it's possible to get really nice even dots, it also has a wonderful randomness to it. Any larger splodges that occur I turn in to other things, random asteroids and other planets.
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  JanL

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Posted: 2010-November-09 at 10:28am | IP Logged Quote JanL

Hi Sophia,  I too think that you did a superb job with your canvas.

There are other techniques that you can use to develop your star background.  Have you tried masking, placing a none absorbing piece of plastic over your dried canvas with cutouts for stars etc?

  You could have several masks, one for yellow stars, blue white, etc.  Same as painting a wall or placing detailing on a car using masking tape to cover areas where you don't want paint to go.

That is where a digital 2d program like Gimp etc comes in handy

Set up your scene there, transfer it to print and poke holes in it and  mask your canvas.

Hopefully, our tradional artists here can give you some neat tips.

Tips, you may want to tell your classes about.  Jan   

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  JKelly

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Posted: 2010-November-09 at 1:41pm | IP Logged Quote JKelly

Really cool piece. I agree with the others on this one, the stars are fantastic. I have no skills at all with a canvas so I can't really help you there. I do enjoy canvas work so keep it up!


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  regulus

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Posted: 2010-November-09 at 1:58pm | IP Logged Quote regulus

I agree with Augustus brown dwarfs are not an easy subject (NASA/ESA if you're reading this - get to work!  we need some pictures of brown dwarfs for reference) I think you've done a good job with it, and personally i think the aurora is a great touch - I think it just needs to be a little more subtle, and maybe less saturated to fit with the rest of the image. Overall, the black is a bit faded, I wonder if you could clean it up on the computer once you have scanned/photographed it, maybe increase the contrast a little or maybe just darken the black of space.


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  karl.garnham1

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Posted: 2010-November-09 at 2:20pm | IP Logged Quote karl.garnham1

Hi Sophia

Wow I really like this picture and I see you added Aurorae to the Brown dwarf very nice touch.  I think you should be really pleased with what you have done because Painting and work that does not involve a computer is always harder because if you mess up you can't save it. You should be really pleased oh and if you ever do want to do painting on a computer there is another piece of software you might like its called inkscape heres a link to it.

www.download.com

although I think this is an excellent picture and to add more effects via a computer would be a great shame because I think this looks excellent just as it is.

Well done oh and Welcome to Solarvoyager

Karl



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  TeranAmbassador33

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Posted: 2010-November-09 at 4:04pm | IP Logged Quote TeranAmbassador33

*first post after fixing login problem*

YES!!!!!!!!!!!!


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  nkalanaga

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Posted: 2010-November-11 at 2:16am | IP Logged Quote nkalanaga

The albedo of a "cold" brown dwarf would be about the same as Jupiter.  Unless it was VERY close to its star, the albedo would almost certainly be higher than the Moon, which is actually quite dark.  So I would say that, given a bright primary, it probably would have a large contrast between lit and unlit sides.  Even close binary stars, where one is much hotter than the other, show evidence of "day" and "night" on the cooler star. 

Of course, "night" is relative for a self-luminous object, but the idea is there...

This seems to be as good an image as we're likely to see until we get an actual photo, which will probably be a long while.  Good job!

N Kalanaga

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  Re(i)mbrandt

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Posted: 2010-November-11 at 12:16pm | IP Logged Quote Re(i)mbrandt

Hello, Sophia,

looks very unique. Interesting structures inside the surface.


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