@article{simpson_imperfectly_2017,
	title = {An imperfectly passive nature: {Bright} sub-millimeter emission from dust-obscured star formation in the z=3.717 "passive" system, {ZF20115}},
	shorttitle = {An imperfectly passive nature},
	url = {http://arxiv.org/abs/1704.03868},
	abstract = {The identification of high-redshift massive galaxies with old stellar populations may pose challenges to some models of galaxy formation. However, to securely classify a galaxy as quiescent, it is necessary to exclude significant ongoing star formation, something that can be challenging to achieve at high redshift. In this letter, we analyse deep ALMA/870um and SCUBA-2/450um imaging of the claimed "post-starburst" galaxy ZF-20115 at z=3.717 that exhibits a strong Balmer break and absorption lines. The far-infrared imaging reveals a luminous starburst located 0.4+/-0.1 arcsec ({\textasciitilde}3kpc in projection) from the position of the rest-frame ultra-violet/optical emission, with an obscured star-formation rate of 100 Mo/yr. This star-forming component is undetected in the rest-frame ultraviolet but contributes significantly to the lower angular resolution photometry at restframe wavelengths {\textgreater}3500A, significantly complicating the determination of a reliable stellar mass. Importantly, in the presence of dust obscuration, strong Balmer features are not a unique signature of a post-starburst galaxy and are indeed frequently observed in infrared-luminous galaxies. We conclude that the ZF20015 system does not pose a challenge to current models of galaxy formation and that deep sub-/millimeter observations are a prerequisite for any claims of quiescence. The multi-wavelength observations of ZF20115 unveil a complex system with an intricate and spatially-varying star-formation history. ZF20115 demonstrates that understanding high-redshift obscured starbursts will only be possible with multi-wavelength studies that include high-resolution observations, available with the JWST, at mid-infrared wavelengths.},
	urldate = {2017-04-18},
	journal = {arXiv:1704.03868 [astro-ph]},
	author = {Simpson, J. M. and Smail, Ian and Wang, Wei-Hao and Riechers, D. and Dunlop, J. S. and Ao, Y. and Bourne, N. and Bunker, A. and Chapman, S. C. and Chen, Chian-Chou and Dannerbauer, H. and Geach, J. E. and Goto, T. and Harrison, C. M. and Hwang, H. S. and Ivison, R. J. and Kodama, Tadayuki and Lee, C.-H. and Lee, H.-M. and Lee, M. and Lim, C.-F. and Michalowski, M. J. and Rosario, D. J. and Shim, H. and Shu, X. W. and Swinbank, A. M. and Tee, W.-L. and Toba, Y. and Valiante, E. and Wang, Junxian and Zheng, X. Z.},
	month = apr,
	year = {2017},
	note = {arXiv: 1704.03868},
	keywords = {Astrophysics - Astrophysics of Galaxies},
}

{"_id":"khP8EKPDyZGZQiWXg","bibbaseid":"simpson-smail-wang-riechers-dunlop-ao-bourne-bunker-etal-animperfectlypassivenaturebrightsubmillimeteremissionfromdustobscuredstarformationinthez3717passivesystemzf20115-2017","author_short":["Simpson, J. M.","Smail, I.","Wang, W.","Riechers, D.","Dunlop, J. S.","Ao, Y.","Bourne, N.","Bunker, A.","Chapman, S. C.","Chen, C.","Dannerbauer, H.","Geach, J. E.","Goto, T.","Harrison, C. M.","Hwang, H. S.","Ivison, R. J.","Kodama, T.","Lee, C.","Lee, H.","Lee, M.","Lim, C.","Michalowski, M. J.","Rosario, D. J.","Shim, H.","Shu, X. W.","Swinbank, A. M.","Tee, W.","Toba, Y.","Valiante, E.","Wang, J.","Zheng, X. Z."],"bibdata":{"bibtype":"article","type":"article","title":"An imperfectly passive nature: Bright sub-millimeter emission from dust-obscured star formation in the z=3.717 \"passive\" system, ZF20115","shorttitle":"An imperfectly passive nature","url":"http://arxiv.org/abs/1704.03868","abstract":"The identification of high-redshift massive galaxies with old stellar populations may pose challenges to some models of galaxy formation. However, to securely classify a galaxy as quiescent, it is necessary to exclude significant ongoing star formation, something that can be challenging to achieve at high redshift. In this letter, we analyse deep ALMA/870um and SCUBA-2/450um imaging of the claimed \"post-starburst\" galaxy ZF-20115 at z=3.717 that exhibits a strong Balmer break and absorption lines. The far-infrared imaging reveals a luminous starburst located 0.4+/-0.1 arcsec (\\textasciitilde3kpc in projection) from the position of the rest-frame ultra-violet/optical emission, with an obscured star-formation rate of 100 Mo/yr. This star-forming component is undetected in the rest-frame ultraviolet but contributes significantly to the lower angular resolution photometry at restframe wavelengths \\textgreater3500A, significantly complicating the determination of a reliable stellar mass. Importantly, in the presence of dust obscuration, strong Balmer features are not a unique signature of a post-starburst galaxy and are indeed frequently observed in infrared-luminous galaxies. We conclude that the ZF20015 system does not pose a challenge to current models of galaxy formation and that deep sub-/millimeter observations are a prerequisite for any claims of quiescence. The multi-wavelength observations of ZF20115 unveil a complex system with an intricate and spatially-varying star-formation history. ZF20115 demonstrates that understanding high-redshift obscured starbursts will only be possible with multi-wavelength studies that include high-resolution observations, available with the JWST, at mid-infrared wavelengths.","urldate":"2017-04-18","journal":"arXiv:1704.03868 [astro-ph]","author":[{"propositions":[],"lastnames":["Simpson"],"firstnames":["J.","M."],"suffixes":[]},{"propositions":[],"lastnames":["Smail"],"firstnames":["Ian"],"suffixes":[]},{"propositions":[],"lastnames":["Wang"],"firstnames":["Wei-Hao"],"suffixes":[]},{"propositions":[],"lastnames":["Riechers"],"firstnames":["D."],"suffixes":[]},{"propositions":[],"lastnames":["Dunlop"],"firstnames":["J.","S."],"suffixes":[]},{"propositions":[],"lastnames":["Ao"],"firstnames":["Y."],"suffixes":[]},{"propositions":[],"lastnames":["Bourne"],"firstnames":["N."],"suffixes":[]},{"propositions":[],"lastnames":["Bunker"],"firstnames":["A."],"suffixes":[]},{"propositions":[],"lastnames":["Chapman"],"firstnames":["S.","C."],"suffixes":[]},{"propositions":[],"lastnames":["Chen"],"firstnames":["Chian-Chou"],"suffixes":[]},{"propositions":[],"lastnames":["Dannerbauer"],"firstnames":["H."],"suffixes":[]},{"propositions":[],"lastnames":["Geach"],"firstnames":["J.","E."],"suffixes":[]},{"propositions":[],"lastnames":["Goto"],"firstnames":["T."],"suffixes":[]},{"propositions":[],"lastnames":["Harrison"],"firstnames":["C.","M."],"suffixes":[]},{"propositions":[],"lastnames":["Hwang"],"firstnames":["H.","S."],"suffixes":[]},{"propositions":[],"lastnames":["Ivison"],"firstnames":["R.","J."],"suffixes":[]},{"propositions":[],"lastnames":["Kodama"],"firstnames":["Tadayuki"],"suffixes":[]},{"propositions":[],"lastnames":["Lee"],"firstnames":["C.-H."],"suffixes":[]},{"propositions":[],"lastnames":["Lee"],"firstnames":["H.-M."],"suffixes":[]},{"propositions":[],"lastnames":["Lee"],"firstnames":["M."],"suffixes":[]},{"propositions":[],"lastnames":["Lim"],"firstnames":["C.-F."],"suffixes":[]},{"propositions":[],"lastnames":["Michalowski"],"firstnames":["M.","J."],"suffixes":[]},{"propositions":[],"lastnames":["Rosario"],"firstnames":["D.","J."],"suffixes":[]},{"propositions":[],"lastnames":["Shim"],"firstnames":["H."],"suffixes":[]},{"propositions":[],"lastnames":["Shu"],"firstnames":["X.","W."],"suffixes":[]},{"propositions":[],"lastnames":["Swinbank"],"firstnames":["A.","M."],"suffixes":[]},{"propositions":[],"lastnames":["Tee"],"firstnames":["W.-L."],"suffixes":[]},{"propositions":[],"lastnames":["Toba"],"firstnames":["Y."],"suffixes":[]},{"propositions":[],"lastnames":["Valiante"],"firstnames":["E."],"suffixes":[]},{"propositions":[],"lastnames":["Wang"],"firstnames":["Junxian"],"suffixes":[]},{"propositions":[],"lastnames":["Zheng"],"firstnames":["X.","Z."],"suffixes":[]}],"month":"April","year":"2017","note":"arXiv: 1704.03868","keywords":"Astrophysics - Astrophysics of Galaxies","bibtex":"@article{simpson_imperfectly_2017,\n\ttitle = {An imperfectly passive nature: {Bright} sub-millimeter emission from dust-obscured star formation in the z=3.717 \"passive\" system, {ZF20115}},\n\tshorttitle = {An imperfectly passive nature},\n\turl = {http://arxiv.org/abs/1704.03868},\n\tabstract = {The identification of high-redshift massive galaxies with old stellar populations may pose challenges to some models of galaxy formation. However, to securely classify a galaxy as quiescent, it is necessary to exclude significant ongoing star formation, something that can be challenging to achieve at high redshift. In this letter, we analyse deep ALMA/870um and SCUBA-2/450um imaging of the claimed \"post-starburst\" galaxy ZF-20115 at z=3.717 that exhibits a strong Balmer break and absorption lines. The far-infrared imaging reveals a luminous starburst located 0.4+/-0.1 arcsec ({\\textasciitilde}3kpc in projection) from the position of the rest-frame ultra-violet/optical emission, with an obscured star-formation rate of 100 Mo/yr. This star-forming component is undetected in the rest-frame ultraviolet but contributes significantly to the lower angular resolution photometry at restframe wavelengths {\\textgreater}3500A, significantly complicating the determination of a reliable stellar mass. Importantly, in the presence of dust obscuration, strong Balmer features are not a unique signature of a post-starburst galaxy and are indeed frequently observed in infrared-luminous galaxies. We conclude that the ZF20015 system does not pose a challenge to current models of galaxy formation and that deep sub-/millimeter observations are a prerequisite for any claims of quiescence. The multi-wavelength observations of ZF20115 unveil a complex system with an intricate and spatially-varying star-formation history. ZF20115 demonstrates that understanding high-redshift obscured starbursts will only be possible with multi-wavelength studies that include high-resolution observations, available with the JWST, at mid-infrared wavelengths.},\n\turldate = {2017-04-18},\n\tjournal = {arXiv:1704.03868 [astro-ph]},\n\tauthor = {Simpson, J. M. and Smail, Ian and Wang, Wei-Hao and Riechers, D. and Dunlop, J. S. and Ao, Y. and Bourne, N. and Bunker, A. and Chapman, S. C. and Chen, Chian-Chou and Dannerbauer, H. and Geach, J. E. and Goto, T. and Harrison, C. M. and Hwang, H. S. and Ivison, R. J. and Kodama, Tadayuki and Lee, C.-H. and Lee, H.-M. and Lee, M. and Lim, C.-F. and Michalowski, M. J. and Rosario, D. J. and Shim, H. and Shu, X. W. and Swinbank, A. M. and Tee, W.-L. and Toba, Y. and Valiante, E. and Wang, Junxian and Zheng, X. Z.},\n\tmonth = apr,\n\tyear = {2017},\n\tnote = {arXiv: 1704.03868},\n\tkeywords = {Astrophysics - Astrophysics of Galaxies},\n}\n\n","author_short":["Simpson, J. M.","Smail, I.","Wang, W.","Riechers, D.","Dunlop, J. S.","Ao, Y.","Bourne, N.","Bunker, A.","Chapman, S. C.","Chen, C.","Dannerbauer, H.","Geach, J. E.","Goto, T.","Harrison, C. M.","Hwang, H. S.","Ivison, R. J.","Kodama, T.","Lee, C.","Lee, H.","Lee, M.","Lim, C.","Michalowski, M. J.","Rosario, D. J.","Shim, H.","Shu, X. W.","Swinbank, A. M.","Tee, W.","Toba, Y.","Valiante, E.","Wang, J.","Zheng, X. Z."],"key":"simpson_imperfectly_2017","id":"simpson_imperfectly_2017","bibbaseid":"simpson-smail-wang-riechers-dunlop-ao-bourne-bunker-etal-animperfectlypassivenaturebrightsubmillimeteremissionfromdustobscuredstarformationinthez3717passivesystemzf20115-2017","role":"author","urls":{"Paper":"http://arxiv.org/abs/1704.03868"},"keyword":["Astrophysics - Astrophysics of Galaxies"],"metadata":{"authorlinks":{}}},"bibtype":"article","biburl":"https://bibbase.org/zotero/polyphant","dataSources":["7gvjSdWrEu7z5vjjj"],"keywords":["astrophysics - astrophysics of galaxies"],"search_terms":["imperfectly","passive","nature","bright","sub","millimeter","emission","dust","obscured","star","formation","717","passive","system","zf20115","simpson","smail","wang","riechers","dunlop","ao","bourne","bunker","chapman","chen","dannerbauer","geach","goto","harrison","hwang","ivison","kodama","lee","lee","lee","lim","michalowski","rosario","shim","shu","swinbank","tee","toba","valiante","wang","zheng"],"title":"An imperfectly passive nature: Bright sub-millimeter emission from dust-obscured star formation in the z=3.717 \"passive\" system, ZF20115","year":2017}