Ian Smail's Outputs (525)

ALESS-JWST: Joint (Sub)kiloparsec JWST and ALMA Imaging of z ~ 3 Submillimeter Galaxies Reveals Heavily Obscured Bulge Formation Events (2025)
Journal Article
Hodge, J. A., Cunha, E. D., Kendrew, S., Li, J., Smail, I., Westoby, B. A., Nayak, O., Swinbank, A. M., Chen, C.-C., Walter, F., Werf, P. V. D., Cracraft, M., Battisti, A., Brandt, W. N., Rivera, G. C., Chapman, S. C., Cox, P., Dannerbauer, H., Decarli, R., Castillo, M. F., …Weiss, A. (2025). ALESS-JWST: Joint (Sub)kiloparsec JWST and ALMA Imaging of z ~ 3 Submillimeter Galaxies Reveals Heavily Obscured Bulge Formation Events. The Astrophysical Journal, 978(2), Article 165. https://doi.org/10.3847/1538-4357/ad9a52

We present JWST NIRCam imaging targeting 13 z ~ 3 infrared-luminous (LIR ∼ 5 × 1012L⊙) galaxies from the ALESS survey with uniquely deep, high-resolution (0 .″ 08–0 .″ 16) Atacama Large Millimeter/submillimeter Array 870 μm imaging. The 2.0–4.4 μm (o... Read More about ALESS-JWST: Joint (Sub)kiloparsec JWST and ALMA Imaging of z ~ 3 Submillimeter Galaxies Reveals Heavily Obscured Bulge Formation Events.

ALMA Lensing Cluster Survey: Deep 1.2 mm Number Counts and Infrared Luminosity Functions at z ≃ 1–8 (2024)
Journal Article
Fujimoto, S., Kohno, K., Ouchi, M., Oguri, M., Kokorev, V., Brammer, G., Sun, F., González-López, J., Bauer, F. E., Caminha, G. B., Hatsukade, B., Richard, J., Smail, I., Tsujita, A., Ueda, Y., Uematsu, R., Zitrin, A., Coe, D., Kneib, J.-P., Postman, M., …Wang, W.-H. (2024). ALMA Lensing Cluster Survey: Deep 1.2 mm Number Counts and Infrared Luminosity Functions at z ≃ 1–8. Astrophysical Journal Supplement, 275(2), Article 36. https://doi.org/10.3847/1538-4365/ad5ae2

We present a statistical study of 180 dust continuum sources identified in 33 massive cluster fields by the Atacama Large Millimeter/submillimeter Array Lensing Cluster Survey (ALCS) over a total of 133 arcmin2 area, homogeneously observed at 1.2 mm.... Read More about ALMA Lensing Cluster Survey: Deep 1.2 mm Number Counts and Infrared Luminosity Functions at z ≃ 1–8.

The properties of the interstellar medium in dusty star-forming galaxies at z ∼ 2–4: the shape of the CO spectral line energy distributions (2024)
Journal Article
Taylor, D. J., Swinbank, A. M., Smail, I., Puglisi, A., Birkin, J. E., Dudzevičiūtė, U., Chen, C.-C., Ikarashi, S., Frias Castillo, M., Weiß, A., Li, Z., Chapman, S. C., Jansen, J., Jiménez-Andrade, E. F., Morabito, L. K., Murphy, E. J., Rybak, M., & van der Werf, P. P. (2025). The properties of the interstellar medium in dusty star-forming galaxies at z ∼ 2–4: the shape of the CO spectral line energy distributions. Monthly Notices of the Royal Astronomical Society, 536(2), 1149-1165. https://doi.org/10.1093/mnras/stae2642

The structure of massive star-forming galaxies from JWST and ALMA: Dusty, high-redshift disc galaxies (2024)
Journal Article
Gillman, S., Smail, I., Gullberg, B., Swinbank, A. M., Vijayan, A. P., Lee, M., Brammer, G., Dudzevičiūtė, U., Greve, T. R., Almaini, O., Brinch, M., Chapman, S. C., Chen, C.-C., Ikarashi, S., Matsuda, Y., Wang, W.-H., Walter, F., & van der Werf, P. P. (2024). The structure of massive star-forming galaxies from JWST and ALMA: Dusty, high-redshift disc galaxies. Astronomy & Astrophysics, 691, Article A299. https://doi.org/10.1051/0004-6361/202451006

We present an analysis of the JWST NIRCam and MIRI morphological and structural properties of 80 massive (log10(M*[M⊙]) = 11.2 ± 0.1) dusty star-forming galaxies at z = 2.7−0.7+1.2, identified as sub-millimetre galaxies (SMGs) by ALMA, which have bee... Read More about The structure of massive star-forming galaxies from JWST and ALMA: Dusty, high-redshift disc galaxies.

SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES). V. Confusion-limited Submillimeter Galaxy Number Counts at 450 μ m and Data Release for the COSMOS Field (2024)
Journal Article
Gao, Z.-K., Lim, C.-F., Wang, W.-H., Chen, C.-C., Smail, I., Chapman, S. C., Zheng, X. Z., Shim, H., Kodama, T., Ao, Y., Chang, S.-Y., Clements, D. L., Dunlop, J. S., Ho, L. C., Hsu, Y.-H., Hwang, C.-Y., Hwang, H. S., Koprowski, M. P., Scott, D., Serjeant, S., …Urquhart, S. A. (2024). SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES). V. Confusion-limited Submillimeter Galaxy Number Counts at 450 μ m and Data Release for the COSMOS Field. The Astrophysical Journal, 971(1), 117. https://doi.org/10.3847/1538-4357/ad53c1

We present confusion-limited SCUBA-2 450 μm observations in the COSMOS-CANDELS region as part of the James Clerk Maxwell Telescope Large Program SCUBA-2 Ultra Deep Imaging EAO Survey. Our maps at 450 and 850 μm cover an area of 450 arcmin2. We achiev... Read More about SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES). V. Confusion-limited Submillimeter Galaxy Number Counts at 450 μ m and Data Release for the COSMOS Field.

MeerKAT observations of starburst galaxies and AGNs within the core of XMMXCS J2215.9−1738 at z  = 1.46 (2024)
Journal Article
Klutse, D. Y., Hilton, M., Heywood, I., Smail, I., Swinbank, A. M., Knowles, K., & Sikhosana, S. P. (2024). MeerKAT observations of starburst galaxies and AGNs within the core of XMMXCS J2215.9−1738 at z  = 1.46. Monthly Notices of the Royal Astronomical Society, 532(2), 2842-2859. https://doi.org/10.1093/mnras/stae1640

KAOSS: turbulent, but disc-like kinematics in dust-obscured star-forming galaxies at z ∼ 1.3–2.6 (2024)
Journal Article
Birkin, J. E., Puglisi, A., Swinbank, A. M., Smail, I., An, F. X., Chapman, S. C., …van der Werf, P. (2024). KAOSS: turbulent, but disc-like kinematics in dust-obscured star-forming galaxies at z ∼ 1.3–2.6. Monthly Notices of the Royal Astronomical Society, 531(1), 61-83. https://doi.org/10.1093/mnras/stae1089

We present spatially resolved kinematics of 27 ALMA-identified dust-obscured star-forming galaxies (DSFGs) at z ∼ 1.3–2.6, as traced by Hα emission using VLT/KMOS near-infrared integral field spectroscopy from the ‘KMOS-ALMA Observations of Submillim... Read More about KAOSS: turbulent, but disc-like kinematics in dust-obscured star-forming galaxies at z ∼ 1.3–2.6.

ALMA Lensing Cluster Survey: Full Spectral Energy Distribution Analysis of z ∼ 0.5–6 Lensed Galaxies Detected with millimeter Observations (2024)
Journal Article
Uematsu, R., Ueda, Y., Kohno, K., Toba, Y., Yamada, S., Smail, I., …Sun, F. (2024). ALMA Lensing Cluster Survey: Full Spectral Energy Distribution Analysis of z ∼ 0.5–6 Lensed Galaxies Detected with millimeter Observations. Astrophysical Journal, 965(2), Article 108. https://doi.org/10.3847/1538-4357/ad26f7

Sub/millimeter galaxies are a key population for the study of galaxy evolution because the majority of star formation at high redshifts occurred in galaxies deeply embedded in dust. To search for this population, we have performed an extensive survey... Read More about ALMA Lensing Cluster Survey: Full Spectral Energy Distribution Analysis of z ∼ 0.5–6 Lensed Galaxies Detected with millimeter Observations.

Obscured star formation in clusters at z = 1.6–2.0: massive galaxy formation and the reversal of the star formation–density relation (2024)
Journal Article
Smail, I. (2024). Obscured star formation in clusters at z = 1.6–2.0: massive galaxy formation and the reversal of the star formation–density relation. Monthly Notices of the Royal Astronomical Society, 529(3), 2290-2308. https://doi.org/10.1093/mnras/stae692

Clusters of galaxies at z 
 1 are expected to be increasingly active sites of star formation. To test this, an 850 m survey was undertaken of eight clusters at z = 1.6–2.0 using SCUBA-2 on the James Clerk Maxwell Telescope. Mid-infrared properties w... Read More about Obscured star formation in clusters at z = 1.6–2.0: massive galaxy formation and the reversal of the star formation–density relation.

An ALMA Spectroscopic Survey of the Brightest Submillimeter Galaxies in the SCUBA-2-COSMOS Field (AS2COSPEC): Physical Properties of z = 2–5 Ultra- and Hyperluminous Infrared Galaxies (2024)
Journal Article
Liao, C., Chen, C., Wang, W., Smail, I., Ao, Y., Chapman, S. C., …Zhao, Y. (2024). An ALMA Spectroscopic Survey of the Brightest Submillimeter Galaxies in the SCUBA-2-COSMOS Field (AS2COSPEC): Physical Properties of z = 2–5 Ultra- and Hyperluminous Infrared Galaxies. Astrophysical Journal, 961(2), Article 226. https://doi.org/10.3847/1538-4357/ad148c

We report the physical properties of the 18 brightest (S 870 μm = 12.4–19.2 mJy) and not strongly lensed 870 μm–selected dusty star-forming galaxies (DSFGs), also known as submillimeter galaxies (SMGs), in the COSMOS field. This sample is part of an... Read More about An ALMA Spectroscopic Survey of the Brightest Submillimeter Galaxies in the SCUBA-2-COSMOS Field (AS2COSPEC): Physical Properties of z = 2–5 Ultra- and Hyperluminous Infrared Galaxies.

Hidden Giants in JWST's PEARLS: An Ultramassive z = 4.26 Submillimeter Galaxy that Is Invisible to HST (2023)
Journal Article
Smail, I., Dudzevičiūtė, U., Gurwell, M., Fazio, G. G., Willner, S. P., Swinbank, A. M., Arumugam, V., Summers, J., Cohen, S. H., Jansen, R. A., Windhorst, R. A., Meena, A., Zitrin, A., Keel, W. C., Cheng, C., Coe, D., Conselice, C. J., D’Silva, J. C. J., Driver, S. P., Frye, B., …Yun, M. (2023). Hidden Giants in JWST's PEARLS: An Ultramassive z = 4.26 Submillimeter Galaxy that Is Invisible to HST. Astrophysical Journal, 958(1), 36. https://doi.org/10.3847/1538-4357/acf931

We present a multiwavelength analysis using the Submillimeter Array (SMA), James Clerk Maxwell Telescope, NOEMA, JWST, the Hubble Space Telescope (HST), and the Spitzer Space Telescope of two dusty strongly star-forming galaxies, 850.1 and 850.2, see... Read More about Hidden Giants in JWST's PEARLS: An Ultramassive z = 4.26 Submillimeter Galaxy that Is Invisible to HST.

PEARLS: Near-infrared Photometry in the JWST North Ecliptic Pole Time Domain Field * * Partly based on observations taken with the MMT, a joint facility operated by the University of Arizona and the Smithsonian Institution. (2023)
Journal Article
Willmer, C. N. A., Ly, C., Kikuta, S., Kattner, S. A., Jansen, R. A., Cohen, S. H., …Grogin, N. A. (2023). PEARLS: Near-infrared Photometry in the JWST North Ecliptic Pole Time Domain Field * * Partly based on observations taken with the MMT, a joint facility operated by the University of Arizona and the Smithsonian Institution. Astrophysical Journal Supplement, 269(1), Article 21. https://doi.org/10.3847/1538-4365/acf57d

We present near-infrared (NIR) ground-based Y, J, H, and K imaging obtained in the James Webb Space Telescope (JWST) North Ecliptic Pole Time Domain Field (NEP TDF) using the MMT-Magellan Infrared Imager and Spectrometer on the MMT. These new observa... Read More about PEARLS: Near-infrared Photometry in the JWST North Ecliptic Pole Time Domain Field * * Partly based on observations taken with the MMT, a joint facility operated by the University of Arizona and the Smithsonian Institution..

VLA Legacy Survey of Molecular Gas in Massive Star-forming Galaxies at High Redshift (2023)
Journal Article
Castillo, M. F., Hodge, J., Rybak, M., van der Werf, P., Smail, I., Birkin, J. E., Chen, C.-C., Chapman, S. C., Hill, R., del P.Lagos, C., Liao, C.-L., da Cunha, E., Rivera, G. C., Chen, J., Jiménez-Andrade, E., Murphy, E. J., Scott, D., Swinbank, A., Walter, F., Ivison, R., & Dannerbauer, H. (2023). VLA Legacy Survey of Molecular Gas in Massive Star-forming Galaxies at High Redshift. Astrophysical Journal, 945(2), Article 128. https://doi.org/10.3847/1538-4357/acb931

We present the initial results of an ongoing survey with the Karl G. Jansky Very Large Array targeting the CO(J = 1–0) transition in a sample of 30 submillimeter-selected, dusty star-forming galaxies (SFGs) at z = 2–5 with existing mid-J CO detection... Read More about VLA Legacy Survey of Molecular Gas in Massive Star-forming Galaxies at High Redshift.

The JCMT SCUBA-2 Survey of the James Webb Space Telescope North Ecliptic Pole Time-Domain Field (2023)
Journal Article
Hyun, M., Im, M., Smail, I. R., Cotton, W. D., Birkin, J. E., Kikuta, S., Shim, H., Willmer, C. N., Condon, J. J., Windhorst, R. A., Cohen, S. H., Jansen, R. A., Ly, C., Matsuda, Y., Fazio, G. G., Swinbank, A., & Yan, H. (2023). The JCMT SCUBA-2 Survey of the James Webb Space Telescope North Ecliptic Pole Time-Domain Field. Astrophysical Journal Supplement, 264(1), Article 19. https://doi.org/10.3847/1538-4365/ac9bf4

The James Webb Space Telescope Time-Domain Field (JWST-TDF) is an ∼14′ diameter field near the North Ecliptic Pole that will be targeted by one of the JWST Guaranteed Time Observations programs. Here, we describe our James Clerk Maxwell Telescope SCU... Read More about The JCMT SCUBA-2 Survey of the James Webb Space Telescope North Ecliptic Pole Time-Domain Field.

JWST’s PEARLS: A JWST/NIRCam View of ALMA Sources (2023)
Journal Article
Cheng, C., Huang, J.-S., Smail, I., Yan, H., Cohen, S. H., Jansen, R. A., Windhorst, R. A., Ma, Z., Koekemoer, A., Willmer, C. N., Willner, S., Diego, J. M., Frye, B., Conselice, C. J., Ferreira, L., Petric, A., Yun, M., Gim, H. B., Polletta, M. D. C., Duncan, K. J., …Ryan, R. E. (2023). JWST’s PEARLS: A JWST/NIRCam View of ALMA Sources. Astrophysical Journal Letters, 942(1), Article L19. https://doi.org/10.3847/2041-8213/aca9d0

We report the results of James Webb Space Telescope/NIRCam observations of 19 (sub)millimeter sources detected by the Atacama Large Millimeter Array (ALMA). The accurate ALMA positions allowed unambiguous identifications of their NIRCam counterparts.... Read More about JWST’s PEARLS: A JWST/NIRCam View of ALMA Sources.

JWST PEARLS. Prime Extragalactic Areas for Reionization and Lensing Science: Project Overview and First Results (2022)
Journal Article
Windhorst, R. A., Cohen, S. H., Jansen, R. A., Summers, J., Tompkins, S., Conselice, C. J., Driver, S. P., Yan, H., Coe, D., Frye, B., Grogin, N., Koekemoer, A., Marshall, M. A., O’Brien, R., Pirzkal, N., Robotham, A., Ryan, R. E., Willmer, C. N., Carleton, T., Diego, J. M., …Zhao, X. (2023). JWST PEARLS. Prime Extragalactic Areas for Reionization and Lensing Science: Project Overview and First Results. Astronomical Journal, 165(1), Article 13. https://doi.org/10.3847/1538-3881/aca163

We give an overview and describe the rationale, methods, and first results from NIRCam images of the JWST “Prime Extragalactic Areas for Reionization and Lensing Science” (PEARLS) project. PEARLS uses up to eight NIRCam filters to survey several prim... Read More about JWST PEARLS. Prime Extragalactic Areas for Reionization and Lensing Science: Project Overview and First Results.

An Ultra-deep Multiband Very Large Array (VLA) Survey of the Faint Radio Sky (COSMOS-XS): New Constraints on the Cosmic Star Formation History (2022)
Journal Article
van der Vlugt, D., Hodge, J. A., Algera, H. S. B., Smail, I., Leslie, S. K., Radcliffe, J. F., …Röttgering, H. (2022). An Ultra-deep Multiband Very Large Array (VLA) Survey of the Faint Radio Sky (COSMOS-XS): New Constraints on the Cosmic Star Formation History. Astrophysical Journal, 941(1), Article 10. https://doi.org/10.3847/1538-4357/ac99db

We make use of ultra-deep 3 GHz Karl G. Jansky Very Large Array (VLA) observations of the COSMOS field from the multiband COSMOS-XS survey to infer radio luminosity functions (LFs) of star-forming galaxies (SFGs). Using ∼1300 SFGs with redshifts out... Read More about An Ultra-deep Multiband Very Large Array (VLA) Survey of the Faint Radio Sky (COSMOS-XS): New Constraints on the Cosmic Star Formation History.

ALMACAL IX: Multiband ALMA survey for dusty star-forming galaxies and the resolved fractions of the cosmic infrared background (2022)
Journal Article
Chen, J., Ivison, R., Zwaan, M. A., Smail, I., Klitsch, A., Péroux, C., Popping, G., Biggs, A. D., Szakacs, R., Hamanowicz, A., & Lagos, C. (2023). ALMACAL IX: Multiband ALMA survey for dusty star-forming galaxies and the resolved fractions of the cosmic infrared background. Monthly Notices of the Royal Astronomical Society, 518(1), 1378-1397. https://doi.org/10.1093/mnras/stac2989

Wide, deep, blind continuum surveys at submillimetre/millimetre (submm/mm) wavelengths are required to provide a full inventory of the dusty, distant Universe. However, conducting such surveys to the necessary depth, with sub-arcsec angular resolutio... Read More about ALMACAL IX: Multiband ALMA survey for dusty star-forming galaxies and the resolved fractions of the cosmic infrared background.

ALMA Lensing Cluster Survey: ALMA-Herschel Joint Study of Lensed Dusty Star-forming Galaxies across z ≃ 0.5 – 6 (2022)
Journal Article
Sun, F., Egami, E., Fujimoto, S., Rawle, T., Bauer, F. E., Kohno, K., Smail, I., Pérez-González, P. G., Ao, Y., Chapman, S. C., Combes, F., Dessauges-Zavadsky, M., Espada, D., González-López, J., Koekemoer, A. M., Kokorev, V., Lee, M. M., Morokuma-Matsui, K., Muñoz Arancibia, A. M., Oguri, M., …Zitrin, A. (2022). ALMA Lensing Cluster Survey: ALMA-Herschel Joint Study of Lensed Dusty Star-forming Galaxies across z ≃ 0.5 – 6. Astrophysical Journal, 932(2), Article 77. https://doi.org/10.3847/1538-4357/ac6e3f

We present an ALMA-Herschel joint analysis of sources detected by the ALMA Lensing Cluster Survey (ALCS) at 1.15 mm. Herschel/PACS and SPIRE data at 100–500 μm are deblended for 180 ALMA sources in 33 lensing cluster fields that are detected either s... Read More about ALMA Lensing Cluster Survey: ALMA-Herschel Joint Study of Lensed Dusty Star-forming Galaxies across z ≃ 0.5 – 6.

An ALMA Spectroscopic Survey of the Brightest Submillimeter Galaxies in the SCUBA-2-COSMOS Field (AS2COSPEC): Survey Description and First Results (2022)
Journal Article
Chen, C.-C., Liao, C.-L., Smail, I., Swinbank, A., Ao, Y., Bunker, A., Chapman, S., Hatsukade, B., Ivison, R., Lee, M. M., Serjeant, S., Umehata, H., Wang, W.-H., & Zhao, Y. (2022). An ALMA Spectroscopic Survey of the Brightest Submillimeter Galaxies in the SCUBA-2-COSMOS Field (AS2COSPEC): Survey Description and First Results. Astrophysical Journal, 929(2), Article 159. https://doi.org/10.3847/1538-4357/ac61df

We introduce an ALMA band 3 spectroscopic survey targeting the brightest submillimeter galaxies (SMGs) in the COSMOS field. Here we present the first results based on the 18 primary SMGs that have 870 μm flux densities of S870 = 12.4–19.3 mJy and are... Read More about An ALMA Spectroscopic Survey of the Brightest Submillimeter Galaxies in the SCUBA-2-COSMOS Field (AS2COSPEC): Survey Description and First Results.