%0 Generic %1 riverathorsen2017sunburst %A Rivera-Thorsen, T. Emil %A Dahle, Håkon %A Gronke, Max %A Bayliss, Matthew %A Rigby, Jane %A Simcoe, Robert %A Bordoloi, Rongmon %A Turner, Monica %A Furesz, Gabor %D 2017 %K Lya lense profile %T The Sunburst Arc: Direct Lyman \alpha escape observed in the brightest known lensed galaxy %U http://arxiv.org/abs/1710.09482 %X We present rest-frame ultraviolet and optical spectroscopy of the brightest lensed galaxy yet discovered, at redshift z = 2.4. This source reveals a characteristic, triple-peaked Lyman \alpha profile which has been predicted by various theoretical works but to our knowledge has not been unambiguously observed previously. The feature is well fit by a superposition of two components: a double-peak profile emerging from substantial radiative transfer, and a narrow, central component resulting from directly escaping Lyman \alpha photons; but is poorly fit by either component alone. We demonstrate that the feature is unlikely to contain contamination from nearby sources, and that the central peak is unaffected by radiative transfer effects apart from very slight absorption. The feature is detected at signal-to-noise ratios exceeding 80 per pixel at line center, and bears strong resemblance to synthetic profiles predicted by numerical models.

@misc{riverathorsen2017sunburst, abstract = {We present rest-frame ultraviolet and optical spectroscopy of the brightest lensed galaxy yet discovered, at redshift z = 2.4. This source reveals a characteristic, triple-peaked Lyman {\alpha} profile which has been predicted by various theoretical works but to our knowledge has not been unambiguously observed previously. The feature is well fit by a superposition of two components: a double-peak profile emerging from substantial radiative transfer, and a narrow, central component resulting from directly escaping Lyman {\alpha} photons; but is poorly fit by either component alone. We demonstrate that the feature is unlikely to contain contamination from nearby sources, and that the central peak is unaffected by radiative transfer effects apart from very slight absorption. The feature is detected at signal-to-noise ratios exceeding 80 per pixel at line center, and bears strong resemblance to synthetic profiles predicted by numerical models.}, added-at = {2017-10-27T10:20:20.000+0200}, author = {Rivera-Thorsen, T. Emil and Dahle, Håkon and Gronke, Max and Bayliss, Matthew and Rigby, Jane and Simcoe, Robert and Bordoloi, Rongmon and Turner, Monica and Furesz, Gabor}, biburl = {https://www.bibsonomy.org/bibtex/27f22dfc1f77d3370e3d507f9637ad0fe/miki}, description = {[1710.09482] The Sunburst Arc: Direct Lyman {\alpha} escape observed in the brightest known lensed galaxy}, interhash = {23440ad70b253c2ce838ce0420daa9f1}, intrahash = {7f22dfc1f77d3370e3d507f9637ad0fe}, keywords = {Lya lense profile}, note = {cite arxiv:1710.09482Comment: Submitted to Astronomy & Astrophysics. 4 pages, 5 figures}, timestamp = {2017-10-27T10:20:20.000+0200}, title = {The Sunburst Arc: Direct Lyman {\alpha} escape observed in the brightest known lensed galaxy}, url = {http://arxiv.org/abs/1710.09482}, year = 2017 }