Starburst Galaxies at z=2.02, and we can see them!
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by
Budgieye
moderator
near here, a starburst galaxy.
http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237679439888318706
SDSS J022017.96-060143.0
a blue star?
In SDSS dr8 SkySever page, it is classified as a star ie. "round"
Herschel Space Telescope, run by European Space Agency, looks at infrared light coming from distant galaxies.
quote from http://phys.org/news/2013-05-fragile-mega-galaxy-link-history-cosmos.html
The new galaxy was initially spotted by UC Irvine postdoctoral scholar Julie Wardlow, also with Cooray's group. She noticed "an amazing, bright blob" in images of the so-called cold cosmos – areas where gas and dust come together to form stars – recorded by the European Space Agency's Herschel telescope with important contributions from NASA's Jet Propulsion Laboratory in Pasadena. "Herschel captured carpets of galaxies, and this one really stood out."
Follow-up views at a variety of wavelengths were obtained at more than a dozen ground-based observatories, particularly the W. M. Keck Observatory in Hawaii.At first, it was listed as a possible gravitationally lensed galaxy.
Ground based visual photography revealed colliding galaxies with an super amazing rate of star formation, and eventual formation of massive galaxy 10X bigger than the Milky Way.
http://en.wikipedia.org/wiki/HXMM01
So if I have managed to target the correct co-ordinates in SDSS navigation, it seems that we can see it too, although it just looks like a star. [EDIT see C-cld 's post below}
If I click on NED, I see that its redshift is 2.206269 with a reference to a publication.
If i click on SIMBAD, I get something, though it is 20.3 arc-sec away, though there is a link to the publication
[EDITED: deletion of incorrect analysis]
more reading
http://www.nature.com/nature/journal/v498/n7454/full/nature12184.html , abstract
http://www.nature.com/nature/journal/v498/n7454/extref/nature12184-s1.pdf
Fu, H.; Cooray, A.; Feruglio, C.; Ivison, R. J.; Riechers, D. A.; Gurwell, M.; Bussmann, R. S.; Harris, A. I.; Altieri, B.; Aussel, H.; Baker, A. J.; Bock, J.; Boylan-Kolchin, M.; Bridge, C.; Calanog, J. A.; Casey, C. M.; Cava, A.; Chapman, S. C.; Clements, D. L.; Conley, A.; Cox, P.; Farrah, D.; Frayer, D.; Hopwood, R.; Jia, J.; Magdis, G.; Marsden, G.; Martínez-Navajas, P.; Negrello, M.; Neri, R. (2013). "The rapid assembly of an elliptical galaxy of 400 billion solar masses at a redshift of 2.3". Nature 498 (7454): 338–341. doi:10.1038/nature12184. PMID 23698363. ( I haven' read this, as it needs money to read)
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c_cld
Hi Budgieye,
The galaxy HXMM01 (1HERMES S250 J022016.5−060143) illustrated in Fu's letter (or paper http://arxiv.org/pdf/1305.4930v1 ) is for its southern part clump X01S z=2.307 in fig. 1
SDSS J022016.59-060145.3 1237679439888318876 type Star
u g r i z
24.33 23.34 23.41 23.93 23.08The northern part of the merger HXMM01 is not identified in SDSS (could be too blended with G1).
The nearby G2 galaxy is SDSS J022016.42-060142.2 Id = 1237679439888318874
with photoZ (KD-tree method) photoZ (RF method)
0.567 ± 0.0882 0.537 ± 0.1237coincident with letter's fig 1 of G2 at z=0.502
1237679439888318874
u g r i z
22.97 23.23 21.17 20.32 19.60Your "blue star" 1237679439888318706 is off target on "E" mark of this pic.
No riddle for me in Skyserver 😃
Cheers
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Budgieye
moderator
Thank you C_cld, for your excellent examination of the co-ordinates and correction. I should have worked harder targeting the exact numbers. I have edited the post.
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