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tests:streams:results [2015/09/02 13:06] – [Spherical stellar halo] khattoritests:streams:results [2022/10/24 12:26] (current) – external edit 127.0.0.1
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     - [[#spherical_halo_challenge|Spherical Halo Challenge]]     - [[#spherical_halo_challenge|Spherical Halo Challenge]]
 ===== 1. Gaia Challenge 2014-2015 ===== ===== 1. Gaia Challenge 2014-2015 =====
 +
 +
 +==== Finding streams in the halo ====
 +
 +===  Paola Re Fiorentin & Alessandro Spagna ===
 +
 +We selected all the stream stellar particles within 3 kpc of the Sun from Robyn Sanderson's data set and applied the random errors expected for FGK dwarfs as estimated by [[http://adsabs.harvard.edu/abs/2015arXiv150803736R| Re Fiorentin et al. 2015]].
 +
 +{{ :tests:streams:spagna_figura10b.png?600 |}}
 +
 +Here, we present the resulting Lxy vs. Lz distribution of the "expected" local streams found using the "true" values (bottom panel),  the final Gaia catalog (middle panel), and the current ground based surveys (top panel).
 +
 +
  
 ====The new Palomar 5 challenge==== ====The new Palomar 5 challenge====
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 {{:tests:streams:bothlt_n50_5e3_1e4_120min_line-triangle_two_params.png?200|}} {{:tests:streams:bothlt_n50_5e3_1e4_120min_line-triangle_two_params.png?200|}}
 +
 +The results for $(M/(10^{12}M_\odot), q_z, R_{Halo})$:
 +
 +A sample of 50 stars:
 +{{:tests:streams:from0000_line-triangle_three_params.png?200|}}
 +
 +Another different sample of 50 stars and the histogram of acceleration at Pal5 for this sample:
 +{{:tests:streams:from3000_line-triangle_three_params.png?200|}}
 +{{:tests:streams:hist_acc_kohei.png?200|}}
  
  
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 ===Kohei Hattori=== ===Kohei Hattori===
 [Kohei2015] [Kohei2015]
-I use 50 randomly selected stars (without error) from the leading or trailing streams. I model the orbital energy distribution in the stream (without distinguishing leading and trailing streams) as a Gaussian distribution and run an emcee code to derive the posterior distribution of $(\log_{10} M/M_\odot, \log_{10} b/{\rm kpc})$.+I use 50 randomly selected stars (without error) from a single stream. I model the orbital energy distribution in the stream (without distinguishing leading and trailing streams) as a Gaussian distribution and run an emcee code to derive the posterior distribution of $(\log_{10} M/M_\odot, \log_{10} b/{\rm kpc})$. 
 + 
 +Results for Stream #41
 {{:tests:streams:kohei_isochrone41_line-triangle_two_params.png?200|}} {{:tests:streams:kohei_isochrone41_line-triangle_two_params.png?200|}}
-{{:tests:streams:isochrone41_posterior_kohei.pdf|}}+{{:tests:streams:isochrone41_posterior_kohei.png?200|}} 
 + 
 +Results for Stream #79 
 +{{:tests:streams:kohei_isochrone79_line-triangle_two_params.png?200|}} 
 + 
 +Results for Stream #111 
 +{{:tests:streams:kohei_isochrone111_line-triangle_two_params.png?200|}} 
 + 
 +Why b is overestimated in some cases? [e.g., #41] 
 +{{:tests:streams:sphericalisochrone_radius_energy.png?200|}}
 ====Finding streams in the halo challenge==== ====Finding streams in the halo challenge====
  
tests/streams/results.1441199216.txt.gz · Last modified: 2022/10/24 12:26 (external edit)