{"PlanS_conform":"1","external_id":{"arxiv":["2503.02059"]},"DOAJ_listed":"1","has_accepted_license":"1","year":"2025","oa_version":"Published Version","publisher":"IOP Publishing","day":"12","author":[{"last_name":"Setton","first_name":"David J.","full_name":"Setton, David J."},{"full_name":"Greene, Jenny E.","last_name":"Greene","first_name":"Jenny E."},{"full_name":"Spilker, Justin S.","first_name":"Justin S.","last_name":"Spilker"},{"full_name":"Williams, Christina C.","last_name":"Williams","first_name":"Christina C."},{"full_name":"Labbé, Ivo","first_name":"Ivo","last_name":"Labbé"},{"last_name":"Ma","first_name":"Yilun 逸伦","full_name":"Ma, Yilun 逸伦"},{"full_name":"Wang, Bingjie 冰洁","last_name":"Wang","first_name":"Bingjie 冰洁"},{"full_name":"Whitaker, Katherine E.","first_name":"Katherine E.","last_name":"Whitaker"},{"first_name":"Joel","last_name":"Leja","full_name":"Leja, Joel"},{"last_name":"de Graaff","first_name":"Anna","full_name":"de Graaff, Anna"},{"full_name":"Alberts, Stacey","first_name":"Stacey","last_name":"Alberts"},{"full_name":"Bezanson, Rachel","last_name":"Bezanson","first_name":"Rachel"},{"full_name":"Boogaard, Leindert A.","first_name":"Leindert A.","last_name":"Boogaard"},{"first_name":"Gabriel","last_name":"Brammer","full_name":"Brammer, Gabriel"},{"first_name":"Sam E.","last_name":"Cutler","full_name":"Cutler, Sam E."},{"first_name":"Nikko J.","last_name":"Cleri","full_name":"Cleri, Nikko J."},{"full_name":"Cooper, Olivia R.","last_name":"Cooper","first_name":"Olivia R."},{"last_name":"Dayal","first_name":"Pratika","full_name":"Dayal, Pratika"},{"full_name":"Fujimoto, Seiji","last_name":"Fujimoto","first_name":"Seiji"},{"last_name":"Furtak","first_name":"Lukas J.","full_name":"Furtak, Lukas J."},{"first_name":"Andy D.","last_name":"Goulding","full_name":"Goulding, Andy D."},{"full_name":"Hirschmann, Michaela","first_name":"Michaela","last_name":"Hirschmann"},{"last_name":"Kokorev","first_name":"Vasily","full_name":"Kokorev, Vasily"},{"last_name":"Maseda","first_name":"Michael V.","full_name":"Maseda, Michael V."},{"first_name":"Ian","last_name":"McConachie","full_name":"McConachie, Ian"},{"orcid":"0000-0003-2871-127X","id":"7439a258-f3c0-11ec-9501-9df22fe06720","first_name":"Jorryt J","last_name":"Matthee","full_name":"Matthee, Jorryt J"},{"full_name":"Miller, Tim B.","last_name":"Miller","first_name":"Tim B."},{"last_name":"Naidu","first_name":"Rohan P.","full_name":"Naidu, Rohan P."},{"full_name":"Oesch, Pascal A.","last_name":"Oesch","first_name":"Pascal A."},{"last_name":"Pan","first_name":"Richard","full_name":"Pan, Richard"},{"last_name":"Price","first_name":"Sedona H.","full_name":"Price, Sedona H."},{"last_name":"Suess","first_name":"Katherine A.","full_name":"Suess, Katherine A."},{"full_name":"Weaver, John R.","first_name":"John R.","last_name":"Weaver"},{"full_name":"Xiao, Mengyuan","first_name":"Mengyuan","last_name":"Xiao"},{"full_name":"Zhang, Yunchong","last_name":"Zhang","first_name":"Yunchong"},{"full_name":"Zitrin, Adi","first_name":"Adi","last_name":"Zitrin"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","intvolume":"       991","article_processing_charge":"Yes","type":"journal_article","doi":"10.3847/2041-8213/ade78b","publication":"The Astrophysical Journal Letters","date_updated":"2026-02-09T07:14:08Z","volume":991,"department":[{"_id":"JoMa"}],"date_created":"2026-01-28T15:23:00Z","scopus_import":"1","publication_identifier":{"issn":["2041-8205"],"eissn":["2041-8213"]},"article_type":"original","publication_status":"published","date_published":"2025-09-12T00:00:00Z","file_date_updated":"2026-02-09T07:10:29Z","status":"public","acknowledgement":"Support for this work was provided by The Brinson Foundation through a Brinson Prize Fellowship grant. D.S. acknowledges Zhengrong Li for kindly sharing model dust SEDs, Tim Rawle for helping with accessing archival Herschel Lensing Survey data, and Xiaohui Fan for helpful conversations that steered the direction of this work. This Letter makes use of the following ALMA data: ADS/JAO.ALMA#2024.00826.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ. This work is based in part on observations made with the NASA/ESA/CSA James Webb Space Telescope. The data were obtained from the Mikulski Archive for Space Telescopes at the Space Telescope Science Institute (DOI: 10.17909/m7ks-wg55), which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127 for JWST. These observations are associated with program #6761.\r\n\r\nSupport for this work was provided by NSF/AAG #2306950. Support for this work for R.P.N. was provided by NASA through the NASA Hubble Fellowship grant HST-HF2-51515.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. This work has received funding from the Swiss State Secretariat for Education, Research and Innovation (SERI) under contract number MB22.00072, as well as from the Swiss National Science Foundation (SNSF) through project grant 200020_207349. The Cosmic Dawn Center is funded by the Danish National Research Foundation under grant DNRF140. A.Z. acknowledges support by grant No. 2020750 from the United States–Israel Binational Science Foundation (BSF) and grant No. 2109066 from the United States National Science Foundation (NSF) and by the Israel Science Foundation grant No. 864/23. The work of C.C.W. is supported by NOIRLab, which is managed by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the National Science Foundation. S.A. acknowledges support from the JWST Mid-Infrared Instrument (MIRI) Science Team Lead, grant 80NSSC18K0555, from NASA Goddard Space Flight Center to the University of Arizona.","quality_controlled":"1","abstract":[{"text":"Luminous broad Hα emission and red rest-optical spectral energy distributions (SEDs) are the hallmark of compact little red dots (LRDs), implying highly attenuated dusty starbursts and/or obscured active galactic nuclei (AGN). However, the lack of observed far-infrared (FIR) emission has proved difficult to reconcile with the implied attenuated luminosity in these models. Here, we utilize deep new Atacama Large Millimeter/submillimeter Array imaging, new and existing JWST/MIRI imaging, and archival Spitzer/Herschel imaging of two of the rest-optically brightest LRDs (z = 3.1 and z = 4.47) to place the strongest constraints on the IR luminosity in LRDs to date. The detections at λrest = 1–4 μm imply flat slopes in the rest-IR, ruling out a contribution from hot (T ≳ 500 K) dust. Similarly, FIR nondetections rule out any appreciable cold (T ≲ 75 K) dust component. Assuming energy balance, these observations are inconsistent with the typical FIR dust emission of dusty starbursts and quasar tori, which usually show a mixture of cold and hot dust. Additionally, our [C ii] nondetections rule out typical dusty starbursts. We compute empirical maximum IR SEDs and find that both LRDs must have log(LIR/L ) 12.2 at the 3σ level. These limits are in tension with the predictions of rest-optical spectrophotometric fits, be they galaxy-only, AGN-only, or composite. It is unlikely that LRDs are highly dust-reddened intrinsically blue sources with a dust temperature distribution that conspires to avoid current observing facilities. Rather, we favor an intrinsically redder LRD SED model that alleviates the need for strong dust attenuation.","lang":"eng"}],"OA_type":"gold","OA_place":"publisher","title":"A confirmed deficit of hot and cold dust emission in the most luminous Little Red Dots","month":"09","language":[{"iso":"eng"}],"oa":1,"ddc":["520"],"arxiv":1,"_id":"21058","citation":{"apa":"Setton, D. J., Greene, J. E., Spilker, J. S., Williams, C. C., Labbé, I., Ma, Y. 逸伦, … Zitrin, A. (2025). A confirmed deficit of hot and cold dust emission in the most luminous Little Red Dots. <i>The Astrophysical Journal Letters</i>. IOP Publishing. <a href=\"https://doi.org/10.3847/2041-8213/ade78b\">https://doi.org/10.3847/2041-8213/ade78b</a>","ista":"Setton DJ, Greene JE, Spilker JS, Williams CC, Labbé I, Ma Y逸伦, Wang B冰洁, Whitaker KE, Leja J, de Graaff A, Alberts S, Bezanson R, Boogaard LA, Brammer G, Cutler SE, Cleri NJ, Cooper OR, Dayal P, Fujimoto S, Furtak LJ, Goulding AD, Hirschmann M, Kokorev V, Maseda MV, McConachie I, Matthee JJ, Miller TB, Naidu RP, Oesch PA, Pan R, Price SH, Suess KA, Weaver JR, Xiao M, Zhang Y, Zitrin A. 2025. A confirmed deficit of hot and cold dust emission in the most luminous Little Red Dots. The Astrophysical Journal Letters. 991, L10.","ieee":"D. J. Setton <i>et al.</i>, “A confirmed deficit of hot and cold dust emission in the most luminous Little Red Dots,” <i>The Astrophysical Journal Letters</i>, vol. 991. IOP Publishing, 2025.","mla":"Setton, David J., et al. “A Confirmed Deficit of Hot and Cold Dust Emission in the Most Luminous Little Red Dots.” <i>The Astrophysical Journal Letters</i>, vol. 991, L10, IOP Publishing, 2025, doi:<a href=\"https://doi.org/10.3847/2041-8213/ade78b\">10.3847/2041-8213/ade78b</a>.","ama":"Setton DJ, Greene JE, Spilker JS, et al. A confirmed deficit of hot and cold dust emission in the most luminous Little Red Dots. <i>The Astrophysical Journal Letters</i>. 2025;991. doi:<a href=\"https://doi.org/10.3847/2041-8213/ade78b\">10.3847/2041-8213/ade78b</a>","short":"D.J. Setton, J.E. Greene, J.S. Spilker, C.C. Williams, I. Labbé, Y.逸伦 Ma, B.冰洁 Wang, K.E. Whitaker, J. Leja, A. de Graaff, S. Alberts, R. Bezanson, L.A. Boogaard, G. Brammer, S.E. Cutler, N.J. Cleri, O.R. Cooper, P. Dayal, S. Fujimoto, L.J. Furtak, A.D. Goulding, M. Hirschmann, V. Kokorev, M.V. Maseda, I. McConachie, J.J. Matthee, T.B. Miller, R.P. Naidu, P.A. Oesch, R. Pan, S.H. Price, K.A. Suess, J.R. Weaver, M. Xiao, Y. Zhang, A. Zitrin, The Astrophysical Journal Letters 991 (2025).","chicago":"Setton, David J., Jenny E. Greene, Justin S. Spilker, Christina C. Williams, Ivo Labbé, Yilun 逸伦 Ma, Bingjie 冰洁 Wang, et al. “A Confirmed Deficit of Hot and Cold Dust Emission in the Most Luminous Little Red Dots.” <i>The Astrophysical Journal Letters</i>. IOP Publishing, 2025. <a href=\"https://doi.org/10.3847/2041-8213/ade78b\">https://doi.org/10.3847/2041-8213/ade78b</a>."},"file":[{"file_size":1394204,"relation":"main_file","checksum":"799518db92ded4e166df4234195af998","date_created":"2026-02-09T07:10:29Z","content_type":"application/pdf","date_updated":"2026-02-09T07:10:29Z","file_id":"21165","file_name":"2025_AstrophysicalJournalLetters_Setton.pdf","success":1,"access_level":"open_access","creator":"dernst"}],"article_number":"L10","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","image":"/images/cc_by.png","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"}}