Astronomy Picture of the Day

Discuss celestial objects and phenomena outside the Earth's atmosphere, Earth-launched satellites and exploratory missions, etc....

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Re: Astronomy Picture of the Day

#3881  Postby i have no avatar » Apr 07, 2018 8:13 pm

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Re: Astronomy Picture of the Day

#3882  Postby i have no avatar » Apr 08, 2018 1:53 pm

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Re: Astronomy Picture of the Day

#3883  Postby i have no avatar » Apr 09, 2018 7:11 pm

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Re: Astronomy Picture of the Day

#3884  Postby i have no avatar » Apr 10, 2018 4:42 pm

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Re: Astronomy Picture of the Day

#3885  Postby newolder » Apr 11, 2018 4:21 pm

Today's APOD is a view of the best candidate for the most distant star observed hitherto from Earth/HST. It's been reported elsewhere many times recently and I was wondering if it would make it as a POD somewhere...
Fortuitous Flash Candidate for the Farthest Star Yet Seen
The gravitational lens is in a galaxy 5 billion light years away and the remote star is calculated to be in a galaxy at a distance of more than 9 billion light years!
...
The light from the record-breaking star, which the team has since nicknamed Icarus, was emitted just 4.4 billion years after the Big Bang.
...

astronomy.com source

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Re: Astronomy Picture of the Day

#3886  Postby i have no avatar » Apr 11, 2018 8:19 pm

Fortuitous Flash Candidate for the Farthest Star Yet Seen

Thanks newolder. It will be interesting to see how long the lensing effect will last and if it comes and goes. I apologize if this was discussed in the references you gave but I am traveling and I am running short on time.
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Re: Astronomy Picture of the Day

#3887  Postby newolder » Apr 11, 2018 9:11 pm

i have no avatar wrote:Fortuitous Flash Candidate for the Farthest Star Yet Seen

Thanks newolder. It will be interesting to see how long the lensing effect will last and if it comes and goes.

The nature note: https://www.nature.com/articles/s41550-018-0430-3 on Fig. 4b shows one of the models of the microlensing event lasted about 200 days mostly in 2016, but the caption includes:
The most densely sampled part of the light curve including the May 2016 peak (Lev16A). This maximum shows two successive peaks that may correspond to a lensed binary system of stars at z = 1.49. MJD is modified Julian date. Error bars correspond to 68% confidence levels.

So the data shows a shorter event than the wider model.
I apologize if this was discussed in the references you gave but I am traveling and I am running short on time.

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Re: Astronomy Picture of the Day

#3888  Postby i have no avatar » Apr 12, 2018 7:35 pm

Thanks again, newolder. Also, I re-read your post and noticed that you included the APOD link. Sorry that I re-posted it. :oops:
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Re: Astronomy Picture of the Day

#3889  Postby i have no avatar » Apr 12, 2018 7:40 pm

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Re: Astronomy Picture of the Day

#3890  Postby i have no avatar » Apr 13, 2018 6:27 pm

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Re: Astronomy Picture of the Day

#3891  Postby i have no avatar » Apr 14, 2018 2:56 pm

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Re: Astronomy Picture of the Day

#3892  Postby i have no avatar » Apr 15, 2018 3:30 pm

Space Shuttle Rising

Hope all goes well during the TESS launch tomorrow, and for the program as a whole.
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Re: Astronomy Picture of the Day

#3893  Postby i have no avatar » Apr 16, 2018 4:19 pm

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Re: Astronomy Picture of the Day

#3894  Postby newolder » Apr 16, 2018 4:29 pm

:clap:
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Re: Astronomy Picture of the Day

#3895  Postby i have no avatar » Apr 17, 2018 6:22 pm

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Re: Astronomy Picture of the Day

#3896  Postby i have no avatar » Apr 18, 2018 11:01 am

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Re: Astronomy Picture of the Day

#3897  Postby i have no avatar » Apr 20, 2018 2:38 am

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Re: Astronomy Picture of the Day

#3898  Postby i have no avatar » Apr 21, 2018 1:28 am

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Re: Astronomy Picture of the Day

#3899  Postby i have no avatar » Apr 21, 2018 5:55 pm

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Re: Astronomy Picture of the Day

#3900  Postby i have no avatar » Apr 23, 2018 1:01 am

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