7 replies to this topic

[Lucullus]

Leaving aside all kinds of seeing aspects, can amateurs detect protoplanetary disks, e.g. in the Orion nebula stellar nursery? What might be the maximal pixel scale to do so; would 0.5"/pixel suffice?

[pbealo]

The problem isn't pixel size. It's seeing. What's your typical seeing? 2 or 3 Arc Sec??

[Lucullus]

2-3 arcseconds. But that isn't the question, which is specifically without the influence of seeing.

[robin_astro]

 e.g. in the Orion nebula stellar nursery?  would 0.5"/pixel suffice?

Yes 

[gregj888]

You might be able to detect them but you won't resolve them,  Just a small darkened spot.

 

When the start talking about radio telescopes there is always a reason-

 

https://arxiv.org/pdf/1805.03669.pdf

 

If I did the math right, some of the bigger ones are about 1 arc-sec.  If you have 4x that resolution (0.25 arc sec) then you start to discern shape.  At 10x with star to see "stuff) (i.e. 0.1 arc sec),

 

Just my guess, I haven't tried it.  Be really tough with seeing.

 

Greg

[Lucullus]

I wonder if it might be something for a 24inch or so telescope and a high QE CMOS with 20 to 30 fps and if several hundred of the sharpest subframes stacked would reveal a rough protoplanetary disk? Would be a cool experiment. Anyone with a good equipment having nothing better to do?

[robin_astro]

This one should be just about be resolvable as being elongated at 1 arcsec resolution (~1x4 pixels at 0.5 arcsec/pixel)

https://www.spacetel...mages/opo9545h/

 

Robin

[gregj888]

Lucullus

 

You may want to download the Speckle Tool Box and try you data set with Bi-Spectrum.  You can combine it with Lucky as well.

 

https://groups.io/g/...einterferometry

 

Greg