The ALMA-CRISTAL Survey: Spatially-resolved Star Formation Activity and Dust Content in 4 < z < 6 Star-forming Galaxies
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2024
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| author | Li, Juno Da Cunha, Elisabete González-López, Jorge Aravena, Manuel De Looze, Ilse Schreiber, N. M. Förster Herrera-Camus, Rodrigo Spilker, Justin Tadaki, Ken-ichi Barcos-Munoz, Loreto Battisti, Andrew J. Birkin, Jack E. Bowler, Rebecca A. A. Davies, Rebecca Díaz-Santos, Tanio Ferrara, Andrea Fisher, Deanne B. Hodge, Jacqueline Ikeda, Ryota Killi, Meghana Lee, Lilian Liu, Daizhong Lutz, Dieter Mitsuhashi, Ikki Naab, Thorsten Posses, Ana Relaño, Monica Solimano, Manuel Übler, Hannah van der Giessen, Stefan Anthony Villanueva, Vicente |
| author_facet | Li, Juno Da Cunha, Elisabete González-López, Jorge Aravena, Manuel De Looze, Ilse Schreiber, N. M. Förster Herrera-Camus, Rodrigo Spilker, Justin Tadaki, Ken-ichi Barcos-Munoz, Loreto Battisti, Andrew J. Birkin, Jack E. Bowler, Rebecca A. A. Davies, Rebecca Díaz-Santos, Tanio Ferrara, Andrea Fisher, Deanne B. Hodge, Jacqueline Ikeda, Ryota Killi, Meghana Lee, Lilian Liu, Daizhong Lutz, Dieter Mitsuhashi, Ikki Naab, Thorsten Posses, Ana Relaño, Monica Solimano, Manuel Übler, Hannah van der Giessen, Stefan Anthony Villanueva, Vicente |
| contents | Using a combination of HST, JWST, and ALMA data, we perform spatially resolved spectral energy distributions (SED) fitting of fourteen 4<z<6 UV-selected main-sequence galaxies targeted by the [CII] Resolved ISM in Star-forming Galaxies with ALMA (CRISTAL) Large Program. We consistently model the emission from stars and dust in ~0.5-1kpc spatial bins to obtain maps of their physical properties. We find no offsets between the stellar masses (M*) and star formation rates (SFRs) derived from their global emission and those from adding up the values in our spatial bins, suggesting there is no bias of outshining by young stars on the derived global properties. We show that ALMA observations are important to derive robust parameter maps because they reduce the uncertainties in Ldust (hence Av and SFR). Using these maps we explore the resolved star-forming main sequence for z~5 galaxies, finding that this relation persists in typical star-forming galaxies in the early Universe. We find less obscured star formation where the M* (and SFR) surface densities are highest, typically in the central regions, contrary to the global relation between these parameters. We speculate this could be caused by feedback driving gas and dust out of these regions. However, more observations of infrared luminosities with ALMA are needed to verify this. Finally, we test empirical SFR prescriptions based on the UV+IR and [CII] line luminosity, finding they work well at the scales probed (~kpc). Our work demonstrates the usefulness of joint HST, JWST, and ALMA resolved SED modeling analyses at high redshift. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_10961 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The ALMA-CRISTAL Survey: Spatially-resolved Star Formation Activity and Dust Content in 4 < z < 6 Star-forming Galaxies Li, Juno Da Cunha, Elisabete González-López, Jorge Aravena, Manuel De Looze, Ilse Schreiber, N. M. Förster Herrera-Camus, Rodrigo Spilker, Justin Tadaki, Ken-ichi Barcos-Munoz, Loreto Battisti, Andrew J. Birkin, Jack E. Bowler, Rebecca A. A. Davies, Rebecca Díaz-Santos, Tanio Ferrara, Andrea Fisher, Deanne B. Hodge, Jacqueline Ikeda, Ryota Killi, Meghana Lee, Lilian Liu, Daizhong Lutz, Dieter Mitsuhashi, Ikki Naab, Thorsten Posses, Ana Relaño, Monica Solimano, Manuel Übler, Hannah van der Giessen, Stefan Anthony Villanueva, Vicente Astrophysics of Galaxies Using a combination of HST, JWST, and ALMA data, we perform spatially resolved spectral energy distributions (SED) fitting of fourteen 4<z<6 UV-selected main-sequence galaxies targeted by the [CII] Resolved ISM in Star-forming Galaxies with ALMA (CRISTAL) Large Program. We consistently model the emission from stars and dust in ~0.5-1kpc spatial bins to obtain maps of their physical properties. We find no offsets between the stellar masses (M*) and star formation rates (SFRs) derived from their global emission and those from adding up the values in our spatial bins, suggesting there is no bias of outshining by young stars on the derived global properties. We show that ALMA observations are important to derive robust parameter maps because they reduce the uncertainties in Ldust (hence Av and SFR). Using these maps we explore the resolved star-forming main sequence for z~5 galaxies, finding that this relation persists in typical star-forming galaxies in the early Universe. We find less obscured star formation where the M* (and SFR) surface densities are highest, typically in the central regions, contrary to the global relation between these parameters. We speculate this could be caused by feedback driving gas and dust out of these regions. However, more observations of infrared luminosities with ALMA are needed to verify this. Finally, we test empirical SFR prescriptions based on the UV+IR and [CII] line luminosity, finding they work well at the scales probed (~kpc). Our work demonstrates the usefulness of joint HST, JWST, and ALMA resolved SED modeling analyses at high redshift. |
| title | The ALMA-CRISTAL Survey: Spatially-resolved Star Formation Activity and Dust Content in 4 < z < 6 Star-forming Galaxies |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2409.10961 |