#20. astrodeep200407aea.png : 無料・フリー素材/写真
#20. astrodeep200407aea.png / rmforall@gmail.com
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | #20. Part of bottom half of Hubble Ultra Deep Field, 7.65 X 7.65 arc-sec, 255 X 255 pixels in the original HUDF, [ cropped from its original 823 X 823 p when saved on MGI PhotoSuite 4.0 as tif 112.618 MB ] become 1911 X 1912 pixels in this expanded view, tif 14.3 MB, uploaded as this png 9.83 MB, just below the 10 MB Flickr limit.Click on All Sizes to select Large and Original for much higher resolution.RTM-1 is a tiny bright blue galaxy pair just above the large yellow galaxy by the lower left edge -- closeup view in #21, is very like CSL-1, only blue and more separated, but with the similar equality of size and color. It turns out that there are so many easily found pairs of all sizes, down to single pixel bright spots separated by a pixel space, that statistical studies are appropriate. Views # 20 to 29 will explore the HUDF, and provide many helpful links. The HUDF is described as 10,500 X 10,500 pixels, at 0.03 arc-seconds/pixel, giving a width of 315 arc-seconds = 5.25 arc-minutes, oriented North at top R corner and East to the top left corner, with the center at Right Ascension 03 hours 32 minutes 39.0 secondsDeclination -27 degrees 47 minutes 29.1 secondsThe sphere of the sky is 41,253 square degrees.This corresponds to 148,510,800 square arcminutes.According to the Space Telescope Science Institute, the Hubble Ultra Deep Field has an angular size of 11.5 square arcminutes.That means that it would take 12,913,983 Deep Field images to cover the entire sphere of the sky.This field is 0.310 X 0.310 of the HUDF, 0.096 of its area, the largest I could upload into Flickr. 97.65X97.65 arc-sec = 1.63X1.63'href="http://hubblesite.org/newscenter/newsdesk/archive/releases/2004/07/text/">hubblesite.org/newscenter/newsdesk/archive/releases/2004/...Hubble's Deepest View Ever of the Universe Unveils Earliest GalaxiesRelease date: 2004.03.09 Images made 2003.09.24 -- 2004.01.16'In this image, blue and green correspond to colors that can be seen by the human eye, such as hot, young, blue stars and the glow of Sun-like stars in the disks of galaxies. Red represents near-infrared light, which is invisible to the human eye, such as the red glow of dust-enshrouded galaxies.'www.iop.org/EJ/article/1538-3881/132/5/1729/204542.web.pd...The Hubble Ultra Deep Field, 2006 Nov., 27 pagesSteven VW Beckwith et al, The Astronomical Journal, 1729-1755"Fig. 4. -- Color rendition of the final HUDF imagecropped to display an area of uniform exposure.[ The size of this cropped area is not clear to me. ] The orientation is such that the left edge is approximately northeast [ top L corner is E ]and the top edge is approximately northwest [ top R corner is N ]. The color mapping used to produce this rendition is as follows:blue, combination of B435 and V606;green, combination of V606 and i775; red, combination of i775 and z850.See also Wherry et al. (2004) for a different approach to the color scheme.A high-resolution version of this figure is available athubblesite.org/newscenter/newsdesk/archive/releases/2004/... ""The final pixel scale was set... to 0".030 pixel E-1 [ 0.030 arcseconds/pixel ]."[ 100 pixels = 3.0 arcseconds[ 6,667 pixels = 200 arcseconds ][ 6,200 pixels = 207 arcseconds ]"Table 1 HUDF Field Characteristics...Size... 200"x200" [ 200x200 arcseconds ]""Fig. 7. -- Images [ color ] of the first 36 B435-dropout sources.Each image is 64x64 pixels [192x192 arcseconds square],corresponding to 13 kpc at z = 4.[ 12 kpc at z = 5 in Fig. 8 ][ 11 kpc at z = 6 in Fig. 9 ]The RGB colors coincide with the i775, V606, and B435 bandsto represent the source colors. [ for Fig. 7 images ][ z850, i775, and V606 bands for Fig. 8 and 9 images ]The small lines denote the exact center position for the objects in the table."upload.wikimedia.org/wikipedia/commons/0/0d/Hubble_ultra_...6200x6200 scaled to 627x627 jpg 18.62819 MBwww.spitzer.caltech.edu/Media/releases/ssc2007-15/papers/...2007.05.01 28 page paper free Optical to mid-IR observations of Lyman-alpha galaxies at z~5 in theHUDF: a young and low mass populationN. Pirzkal, S. Malhotra ,J. E. Rhoads, C. Xuimgsrc.hubblesite.org/hu/db/images/hs-2004-07-a-full_tif.tifzoomable, N to right, E to topwww.nasaimages.org/luna/servlet/detail/nasaNAS~12~12~6740...hubblesite.org/newscenter/newsdesk/archive/releases/2004/...highest resolution available public image 6200 X 6200 pixels TIFF 109.99 MBhubblesite.org/newscenter/newsdesk/archive/releases/2004/...The Large view of the HUDF is a JPG size .0681 MB, which shows RML-1 as a blue dot. Enlarging it gives a 4 X 4 p white grey object that has only a hint of something to its right.hubblesite.org/newscenter/newsdesk/archive/releases/2004/...This gives a fine TIFF view from HUDF of the RML-1 field, a little smaller than my view here, 2.87 MB, saved on my computer as a tif 2.942 MB. A closeup of RML-1 in their view clearly shows a double galaxy, with the L side slightly larger, about 12 X 12 pixels maximum, and a brighter core of about 6 X 6 pixels: blue, green, brown.Click on All Sizes to view Large and Original. Notice the many bright blue pairs, and in Original the background haze of myriad tiny blue spots, which I call Bright Blue Blazers, with many pairs of BBB.If you hold a 4 inch reading glass close to your face and look through it with both eyes closely at the monitor screen or a color print, with the background lights turned off in your room, you will see the different colors separated out as an apparent 3D image about a centimeter deep, with red spots closer and the BBB in back, against a 3D fractile network of tangled dark filaments. Look close to the bright yellow-red star and the large blue-white galaxy to see the dark background filaments.The galaxy has many blue clumps inside it, indicating that it grew by absorbing many blue dwarf galaxies. xxx.lanl.gov/PS_cache/astro-ph/pdf/0504/0504032.pdfarXiv:astro-ph/0504032 v1 1 Apr 2005 Stellar Populations in Galaxies |
| 撮影日 | 2005-06-13 00:45:34 |
| 撮影者 | rmforall@gmail.com , Santa Fe, New Mexico 87505, USA |
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