Extinction and nebular line properties of a Herschel-selected lensed dusty starburst at z = 1.027
We present Hubble Space Telescope Wide Field Camera 3 (WFC3) imaging and grism spectroscopy observations of the Herschel-selected gravitationally lensed starburst galaxy HATLASJ1429-0028. The lensing system consists of an edge-on foreground disk galaxy at z = 0.218 with a nearly complete Einstein ri...
| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
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American Astronomical Society
2015
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| Online Access: | https://eprints.nottingham.ac.uk/42362/ |
| _version_ | 1848796471500996608 |
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| author | Timmons, Nicholas Cooray, Asantha Nayyeri, Hooshang Casey, Caitlin Calanog, Jae Ma, Brian Messias, Hugo Baes, Maarten Bussmann, R. Shane Dunne, Loretta Dye, S. Eales, Steve Fu, Hai Ivison, R.J. Maddox, Steve Michałowski, Michał J. Oteo, I. Riechers, Dominik A. Valiante, Elisabetta Wardlow, Julie |
| author_facet | Timmons, Nicholas Cooray, Asantha Nayyeri, Hooshang Casey, Caitlin Calanog, Jae Ma, Brian Messias, Hugo Baes, Maarten Bussmann, R. Shane Dunne, Loretta Dye, S. Eales, Steve Fu, Hai Ivison, R.J. Maddox, Steve Michałowski, Michał J. Oteo, I. Riechers, Dominik A. Valiante, Elisabetta Wardlow, Julie |
| author_sort | Timmons, Nicholas |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | We present Hubble Space Telescope Wide Field Camera 3 (WFC3) imaging and grism spectroscopy observations of the Herschel-selected gravitationally lensed starburst galaxy HATLASJ1429-0028. The lensing system consists of an edge-on foreground disk galaxy at z = 0.218 with a nearly complete Einstein ring of the infrared luminous galaxy at z = 1.027. The WFC3 spectroscopy with G102 and G141 grisms, covering the wavelength range of 0.8–1.7 μm, resulted in detections of Hα + [Nii], Hβ, [Sii], and [Oiii] for the background galaxy from which we measure line fluxes and ratios. The Balmer line ratio Hα/Hβ of 7.5 ± 4.4, when corrected for [Nii], results in an extinction for the starburst galaxy of . The Hα-based star formation rate (SFR), when corrected for extinction, is 60 ± 50 yr−1, lower than the instantaneous SFR of 390 ± 90 yr−1 from the total IR luminosity. We also compare the nebular line ratios of HATLASJ1429-0028 with other star-forming and sub-millimeter bright galaxies. The nebular line ratios are consistent with an intrinsic ultra-luminous infrared galaxy with no evidence for excitation by an active galactic nucleus (AGN). We estimate the metallicity, 12 + log(O/H), of HATLASJ1429-0028 to be 8.49 ± 0.16. Such a low value is below the average relation for stellar mass versus metallicity of galaxies at for a galaxy with a stellar mass of . The combination of high stellar mass, the lack of AGN indicators, low metallicity, and the high SFR of HATLASJ1429-0028 suggest that this galaxy is currently undergoing a rapid formation. |
| first_indexed | 2025-11-14T19:48:31Z |
| format | Article |
| id | nottingham-42362 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:48:31Z |
| publishDate | 2015 |
| publisher | American Astronomical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-423622020-05-04T17:07:55Z https://eprints.nottingham.ac.uk/42362/ Extinction and nebular line properties of a Herschel-selected lensed dusty starburst at z = 1.027 Timmons, Nicholas Cooray, Asantha Nayyeri, Hooshang Casey, Caitlin Calanog, Jae Ma, Brian Messias, Hugo Baes, Maarten Bussmann, R. Shane Dunne, Loretta Dye, S. Eales, Steve Fu, Hai Ivison, R.J. Maddox, Steve Michałowski, Michał J. Oteo, I. Riechers, Dominik A. Valiante, Elisabetta Wardlow, Julie We present Hubble Space Telescope Wide Field Camera 3 (WFC3) imaging and grism spectroscopy observations of the Herschel-selected gravitationally lensed starburst galaxy HATLASJ1429-0028. The lensing system consists of an edge-on foreground disk galaxy at z = 0.218 with a nearly complete Einstein ring of the infrared luminous galaxy at z = 1.027. The WFC3 spectroscopy with G102 and G141 grisms, covering the wavelength range of 0.8–1.7 μm, resulted in detections of Hα + [Nii], Hβ, [Sii], and [Oiii] for the background galaxy from which we measure line fluxes and ratios. The Balmer line ratio Hα/Hβ of 7.5 ± 4.4, when corrected for [Nii], results in an extinction for the starburst galaxy of . The Hα-based star formation rate (SFR), when corrected for extinction, is 60 ± 50 yr−1, lower than the instantaneous SFR of 390 ± 90 yr−1 from the total IR luminosity. We also compare the nebular line ratios of HATLASJ1429-0028 with other star-forming and sub-millimeter bright galaxies. The nebular line ratios are consistent with an intrinsic ultra-luminous infrared galaxy with no evidence for excitation by an active galactic nucleus (AGN). We estimate the metallicity, 12 + log(O/H), of HATLASJ1429-0028 to be 8.49 ± 0.16. Such a low value is below the average relation for stellar mass versus metallicity of galaxies at for a galaxy with a stellar mass of . The combination of high stellar mass, the lack of AGN indicators, low metallicity, and the high SFR of HATLASJ1429-0028 suggest that this galaxy is currently undergoing a rapid formation. American Astronomical Society 2015-05-28 Article PeerReviewed Timmons, Nicholas, Cooray, Asantha, Nayyeri, Hooshang, Casey, Caitlin, Calanog, Jae, Ma, Brian, Messias, Hugo, Baes, Maarten, Bussmann, R. Shane, Dunne, Loretta, Dye, S., Eales, Steve, Fu, Hai, Ivison, R.J., Maddox, Steve, Michałowski, Michał J., Oteo, I., Riechers, Dominik A., Valiante, Elisabetta and Wardlow, Julie (2015) Extinction and nebular line properties of a Herschel-selected lensed dusty starburst at z = 1.027. Astrophysical Journal, 805 (2). 140/1-140/6. ISSN 1538-4357 cosmology: observations; galaxies: evolution; infrared: galaxies; submillimeter: galaxies http://iopscience.iop.org/article/10.1088/0004-637X/805/2/140/meta doi:10.1088/0004-637X/805/2/140 doi:10.1088/0004-637X/805/2/140 |
| spellingShingle | cosmology: observations; galaxies: evolution; infrared: galaxies; submillimeter: galaxies Timmons, Nicholas Cooray, Asantha Nayyeri, Hooshang Casey, Caitlin Calanog, Jae Ma, Brian Messias, Hugo Baes, Maarten Bussmann, R. Shane Dunne, Loretta Dye, S. Eales, Steve Fu, Hai Ivison, R.J. Maddox, Steve Michałowski, Michał J. Oteo, I. Riechers, Dominik A. Valiante, Elisabetta Wardlow, Julie Extinction and nebular line properties of a Herschel-selected lensed dusty starburst at z = 1.027 |
| title | Extinction and nebular line properties of a Herschel-selected lensed dusty starburst at z = 1.027 |
| title_full | Extinction and nebular line properties of a Herschel-selected lensed dusty starburst at z = 1.027 |
| title_fullStr | Extinction and nebular line properties of a Herschel-selected lensed dusty starburst at z = 1.027 |
| title_full_unstemmed | Extinction and nebular line properties of a Herschel-selected lensed dusty starburst at z = 1.027 |
| title_short | Extinction and nebular line properties of a Herschel-selected lensed dusty starburst at z = 1.027 |
| title_sort | extinction and nebular line properties of a herschel-selected lensed dusty starburst at z = 1.027 |
| topic | cosmology: observations; galaxies: evolution; infrared: galaxies; submillimeter: galaxies |
| url | https://eprints.nottingham.ac.uk/42362/ https://eprints.nottingham.ac.uk/42362/ https://eprints.nottingham.ac.uk/42362/ |