SPT0346-52: NEGLIGIBLE AGN ACTIVITY IN A COMPACT, HYPER-STARBURST GALAXY AT
We present Chandra ACIS-S and Australia Telescope Compact Array (ATCA) radio continuum observations of the strongly lensed dusty, star-forming galaxy SPT-S J034640-5204.9 (hereafter SPT0346-52) at z = 5.656. This galaxy has also been observed with ALMA, HST, Spitzer, Herschel, Atacama Pathfinder EXp...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
IOP Publishing
2017
|
| Online Access: | http://hdl.handle.net/1721.1/108177 https://orcid.org/0000-0001-5226-8349 |
| _version_ | 1826204852763492352 |
|---|---|
| author | Ma, Jingzhe Gonzalez, Anthony. H. Vieira, J. D. Aravena, M. Ashby, M. L. N. Béthermin, M. Bothwell, M. S. Brandt, W. N. Breuck, C. de Carlstrom, J. E. Chapman, S. C. Gullberg, B. Hezaveh, Y. Litke, K. Malkan, M. Marrone, D. P. Murphy, E. J. Spilker, J. S. Sreevani, J. Stark, A. A. Strandet, M. Wang, S. X. McDonald, Michael A. |
| author2 | MIT Kavli Institute for Astrophysics and Space Research |
| author_facet | MIT Kavli Institute for Astrophysics and Space Research Ma, Jingzhe Gonzalez, Anthony. H. Vieira, J. D. Aravena, M. Ashby, M. L. N. Béthermin, M. Bothwell, M. S. Brandt, W. N. Breuck, C. de Carlstrom, J. E. Chapman, S. C. Gullberg, B. Hezaveh, Y. Litke, K. Malkan, M. Marrone, D. P. Murphy, E. J. Spilker, J. S. Sreevani, J. Stark, A. A. Strandet, M. Wang, S. X. McDonald, Michael A. |
| author_sort | Ma, Jingzhe |
| collection | MIT |
| description | We present Chandra ACIS-S and Australia Telescope Compact Array (ATCA) radio continuum observations of the strongly lensed dusty, star-forming galaxy SPT-S J034640-5204.9 (hereafter SPT0346-52) at z = 5.656. This galaxy has also been observed with ALMA, HST, Spitzer, Herschel, Atacama Pathfinder EXperiment, and the Very Large Telescope. Previous observations indicate that if the infrared (IR) emission is driven by star formation, then the inferred lensing-corrected star formation rate (SFR) (~4500 M ☉ yr[superscript −1]) and SFR surface density Σ[subscript SFR] (~2000 M ☉ yr[superscript −1] kpc[superscript −2]) are both exceptionally high. It remained unclear from the previous data, however, whether a central active galactic nucleus (AGN) contributes appreciably to the IR luminosity. The Chandra upper limit shows that SPT0346-52 is consistent with being star formation dominated in the X-ray, and any AGN contribution to the IR emission is negligible. The ATCA radio continuum upper limits are also consistent with the FIR-to-radio correlation for star-forming galaxies with no indication of an additional AGN contribution. The observed prodigious intrinsic IR luminosity of (3.6 ± 0.3) × 10[superscript 13] L ☉ originates almost solely from vigorous star formation activity. With an intrinsic source size of 0.61 ± 0.03 kpc, SPT0346-52 is confirmed to have one of the highest Σ[subscript SFR] of any known galaxy. This high Σ[subscript SFR], which approaches the Eddington limit for a radiation pressure supported starburst, may be explained by a combination of very high star formation efficiency and gas fraction. |
| first_indexed | 2024-09-23T13:02:24Z |
| format | Article |
| id | mit-1721.1/108177 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:02:24Z |
| publishDate | 2017 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/1081772022-09-28T11:41:16Z SPT0346-52: NEGLIGIBLE AGN ACTIVITY IN A COMPACT, HYPER-STARBURST GALAXY AT Ma, Jingzhe Gonzalez, Anthony. H. Vieira, J. D. Aravena, M. Ashby, M. L. N. Béthermin, M. Bothwell, M. S. Brandt, W. N. Breuck, C. de Carlstrom, J. E. Chapman, S. C. Gullberg, B. Hezaveh, Y. Litke, K. Malkan, M. Marrone, D. P. Murphy, E. J. Spilker, J. S. Sreevani, J. Stark, A. A. Strandet, M. Wang, S. X. McDonald, Michael A. MIT Kavli Institute for Astrophysics and Space Research McDonald, Michael A. We present Chandra ACIS-S and Australia Telescope Compact Array (ATCA) radio continuum observations of the strongly lensed dusty, star-forming galaxy SPT-S J034640-5204.9 (hereafter SPT0346-52) at z = 5.656. This galaxy has also been observed with ALMA, HST, Spitzer, Herschel, Atacama Pathfinder EXperiment, and the Very Large Telescope. Previous observations indicate that if the infrared (IR) emission is driven by star formation, then the inferred lensing-corrected star formation rate (SFR) (~4500 M ☉ yr[superscript −1]) and SFR surface density Σ[subscript SFR] (~2000 M ☉ yr[superscript −1] kpc[superscript −2]) are both exceptionally high. It remained unclear from the previous data, however, whether a central active galactic nucleus (AGN) contributes appreciably to the IR luminosity. The Chandra upper limit shows that SPT0346-52 is consistent with being star formation dominated in the X-ray, and any AGN contribution to the IR emission is negligible. The ATCA radio continuum upper limits are also consistent with the FIR-to-radio correlation for star-forming galaxies with no indication of an additional AGN contribution. The observed prodigious intrinsic IR luminosity of (3.6 ± 0.3) × 10[superscript 13] L ☉ originates almost solely from vigorous star formation activity. With an intrinsic source size of 0.61 ± 0.03 kpc, SPT0346-52 is confirmed to have one of the highest Σ[subscript SFR] of any known galaxy. This high Σ[subscript SFR], which approaches the Eddington limit for a radiation pressure supported starburst, may be explained by a combination of very high star formation efficiency and gas fraction. Chandra X-ray Center (U.S.) (GO5- 16116A) National Science Foundation (U.S.) (AST-1312950) Space Telescope Science Institute (U.S.) (51358.001-A) 2017-04-14T19:02:57Z 2017-04-14T19:02:57Z 2016-11 2016-09 Article http://purl.org/eprint/type/JournalArticle 1538-4357 0004-6256 http://hdl.handle.net/1721.1/108177 Ma, Jingzhe, Anthony. H. Gonzalez, J. D. Vieira, M. Aravena, M. L. N. Ashby, M. Béthermin, M. S. Bothwell, et al. “SPT0346-52: NEGLIGIBLE AGN ACTIVITY IN A COMPACT, HYPER-STARBURST GALAXY AT z = 5.7.” The Astrophysical Journal 832, no. 2 (November 22, 2016): 114. © 2016 The American Astronomical Society. https://orcid.org/0000-0001-5226-8349 en_US http://dx.doi.org/10.3847/0004-637x/832/2/114 Astrophysical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf IOP Publishing American Astronomical Society |
| spellingShingle | Ma, Jingzhe Gonzalez, Anthony. H. Vieira, J. D. Aravena, M. Ashby, M. L. N. Béthermin, M. Bothwell, M. S. Brandt, W. N. Breuck, C. de Carlstrom, J. E. Chapman, S. C. Gullberg, B. Hezaveh, Y. Litke, K. Malkan, M. Marrone, D. P. Murphy, E. J. Spilker, J. S. Sreevani, J. Stark, A. A. Strandet, M. Wang, S. X. McDonald, Michael A. SPT0346-52: NEGLIGIBLE AGN ACTIVITY IN A COMPACT, HYPER-STARBURST GALAXY AT |
| title | SPT0346-52: NEGLIGIBLE AGN ACTIVITY IN A COMPACT, HYPER-STARBURST GALAXY AT |
| title_full | SPT0346-52: NEGLIGIBLE AGN ACTIVITY IN A COMPACT, HYPER-STARBURST GALAXY AT |
| title_fullStr | SPT0346-52: NEGLIGIBLE AGN ACTIVITY IN A COMPACT, HYPER-STARBURST GALAXY AT |
| title_full_unstemmed | SPT0346-52: NEGLIGIBLE AGN ACTIVITY IN A COMPACT, HYPER-STARBURST GALAXY AT |
| title_short | SPT0346-52: NEGLIGIBLE AGN ACTIVITY IN A COMPACT, HYPER-STARBURST GALAXY AT |
| title_sort | spt0346 52 negligible agn activity in a compact hyper starburst galaxy at |
| url | http://hdl.handle.net/1721.1/108177 https://orcid.org/0000-0001-5226-8349 |
| work_keys_str_mv | AT majingzhe spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT gonzalezanthonyh spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT vieirajd spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT aravenam spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT ashbymln spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT betherminm spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT bothwellms spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT brandtwn spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT breuckcde spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT carlstromje spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT chapmansc spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT gullbergb spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT hezavehy spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT litkek spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT malkanm spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT marronedp spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT murphyej spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT spilkerjs spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT sreevanij spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT starkaa spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT strandetm spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT wangsx spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat AT mcdonaldmichaela spt034652negligibleagnactivityinacompacthyperstarburstgalaxyat |