[ { "id": "authors:e3bdw-44m30", "collection": "authors", "collection_id": "e3bdw-44m30", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200309-124819106", "type": "publication_whitepaper", "title": "Astro2020 APC White Paper: Theoretical Astrophysics 2020-2030", "author": [ { "family_name": "Kollmeier", "given_name": "Juna A.", "orcid": "0000-0001-9852-1610", "clpid": "Kollmeier-J-A" }, { "family_name": "Anderson", "given_name": "Lauren", "clpid": "Anderson-L" }, { "family_name": "Benson", "given_name": "Andrew", "orcid": "0000-0001-5501-6008", "clpid": "Benson-A-J" }, { "family_name": "Bogdanovi\u0107", "given_name": "Tamara", "orcid": "0000-0002-7835-7814", "clpid": "Bogdanovi\u0107-T" }, { "family_name": "Boylan-Kolchin", "given_name": "Michael", "orcid": "0000-0002-9604-343X", "clpid": "Boylan-Kolchin-M" }, { "family_name": "Bullock", "given_name": "James S.", "orcid": "0000-0003-4298-5082", "clpid": "Bullock-J-S" }, { "family_name": "Dav\u00e9", "given_name": "Romeel", "clpid": "Dav\u00e9-R" }, { "family_name": "Fraschetti", "given_name": "Federico", "clpid": "Fraschetti-F" }, { "family_name": "Fuller", "given_name": "Jim", "orcid": "0000-0002-4544-0750", "clpid": "Fuller-J" }, { "family_name": "Hopkins", "given_name": "Phil", "orcid": "0000-0003-3729-1684", "clpid": "Hopkins-P-F" }, { "family_name": "Kaplinghat", "given_name": "Manoj", "clpid": "Kaplinghat-M" }, { "family_name": "Kratter", "given_name": "Kaitlin", "orcid": "0000-0001-5253-1338", "clpid": "Kratter-K-M" }, { "family_name": "Lamberts", "given_name": "Astrid", "orcid": "0000-0001-8740-0127", "clpid": "Lamberts-A" }, { "family_name": "Miller", "given_name": "M. Coleman", "orcid": "0000-0002-2666-728X", "clpid": "Miller-M-C" }, { "family_name": "Owen", "given_name": "James E.", "clpid": "Owen-J-E" }, { "family_name": "Phinney", "given_name": "E. Sterl", "orcid": "0000-0002-9656-4032", "clpid": "Phinney-E-S" }, { "family_name": "Piro", "given_name": "Anthony L.", "orcid": "0000-0001-6806-0673", "clpid": "Piro-A-L" }, { "family_name": "Rix", "given_name": "Hans-Walter", "orcid": "0000-0003-4996-9069", "clpid": "Rix-H-W" }, { "family_name": "Robertson", "given_name": "Brant", "orcid": "0000-0002-4271-0364", "clpid": "Robertson-B-E" }, { "family_name": "Wetzel", "given_name": "Andrew", "orcid": "0000-0003-0603-8942", "clpid": "Wetzel-A-R" }, { "family_name": "Wheeler", "given_name": "Coral", "clpid": "Wheeler-C" }, { "family_name": "Youdin", "given_name": "Andrew N.", "clpid": "Youdin-A-N" }, { "family_name": "Zaldarriaga", "given_name": "Matias", "clpid": "Zaldarriaga-M" } ], "abstract": "The past two decades have seen a tremendous investment in observational facilities that promise to reveal new and unprecedented discoveries about the universe. In comparison, the investment in theoretical work is completely dwarfed, even though theory plays a crucial role in the interpretation of these observations, predicting new types of phenomena, and informing observing strategies. In this white paper, we argue that in order to reach the promised critical breakthroughs in astrophysics over the next decade and well beyond, the national agencies must take a serious approach to investment in theoretical astrophysics research. We discuss the role of theory in shaping our understanding of the universe, and then we provide a multi-level strategy, from the grassroots to the national, to address the current underinvestment in theory relative to observational work.", "doi": "10.48550/arXiv.1912.09992", "publisher": "arXiv", "publication_date": "2019-12-18" }, { "id": "authors:z9bf1-d2207", "collection": "authors", "collection_id": "z9bf1-d2207", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190726-083708919", "type": "publication_whitepaper", "title": "Astro2020 Science White Paper: Physical Conditions in the Cold Gas of Local Galaxies", "author": [ { "family_name": "Leroy", "given_name": "Adam K.", "orcid": "0000-0002-2545-1700", "clpid": "Leroy-A-K" }, { "family_name": "Bolatto", "given_name": "Alberto D.", "orcid": "0000-0002-5480-5686", "clpid": "Bolatto-A-D" }, { "family_name": "Davis", "given_name": "Timothy A.", "clpid": "Davis-T-A" }, { "family_name": "Evans", "given_name": "Aaron S.", "orcid": "0000-0003-2638-1334", "clpid": "Evans-A-S" }, { "family_name": "Harris", "given_name": "Andrew", "orcid": "0000-0001-6159-9174", "clpid": "Harris-A-I" }, { "family_name": "Hopkins", "given_name": "Philip", "orcid": "0000-0003-3729-1684", "clpid": "Hopkins-P-F" }, { "family_name": "Hughes", "given_name": "Annie", "clpid": "Hughes-A" }, { "family_name": "Indebetouw", "given_name": "Remy", "clpid": "Indebetouw-R" }, { "family_name": "Johnson", "given_name": "Kelsey E.", "orcid": "0000-0001-8348-2671", "clpid": "Johnson-K-E" }, { "family_name": "Kepley", "given_name": "Amanda A.", "clpid": "Kepley-A-A" }, { "family_name": "Koda", "given_name": "Jin", "orcid": "0000-0002-8762-7863", "clpid": "Koda-Jin" }, { "family_name": "Meier", "given_name": "David", "orcid": "0000-0001-9436-9471", "clpid": "Meier-D-S" }, { "family_name": "Murphy", "given_name": "Eric", "orcid": "0000-0001-7089-7325", "clpid": "Murphy-E-J" }, { "family_name": "Narayanan", "given_name": "Desika", "orcid": "0000-0002-7064-4309", "clpid": "Narayanan-D" }, { "family_name": "Rosolowsky", "given_name": "Erik", "orcid": "0000-0002-5204-2259", "clpid": "Rosolowsky-E" }, { "family_name": "Schinnerer", "given_name": "Eva", "orcid": "0000-0002-3933-7677", "clpid": "Schinnerer-E" }, { "family_name": "Sun", "given_name": "Jiayin", "clpid": "Sun-Jiayin" }, { "family_name": "Wilson", "given_name": "Christine", "orcid": "0000-0001-5817-0991", "clpid": "Wilson-C-D" }, { "family_name": "Wong", "given_name": "Tony", "clpid": "Wong-Tony" } ], "abstract": "We describe a next major frontier in observational studies of galaxy evolution and star formation: linking the physical conditions in the cold, star-forming interstellar medium to host galaxy and local environment. The integrated gas content of galaxies has been surveyed extensively over the last decades. The link between environment and cold gas density, turbulence, excitation, dynamical state, and chemical makeup remain far less well understood. We know that these properties do vary dramatically and theoretical work posits a strong connection between the state of the gas, its ability to form stars, and the impact of stellar feedback. A next major step in the field will be to use sensitive cm-, mm-, and submm-wave spectroscopy and high resolution spectroscopic imaging to survey the state of cold gas across the whole local galaxy population. Such observations have pushed the capabilities of the current generation of telescopes. We highlight three critical elements for progress in the next decade: (1) robust support and aggressive development of ALMA, (2) the deployment of very large heterodyne receiver arrays on single dish telescopes, and (3) development of a new interferometric array that dramatically improves on current capabilities at cm- and mm-wavelengths (~ 1-115 GHz).", "doi": "10.48550/arXiv.1904.01661", "publisher": "arXiv", "publication_date": "2019-04-02" }, { "id": "authors:5f4rf-p8x96", "collection": "authors", "collection_id": "5f4rf-p8x96", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190626-140614418", "type": "publication_whitepaper", "title": "Observing Galaxy Evolution in the Context of Large-Scale Structure", "author": [ { "family_name": "Dickinson", "given_name": "Mark", "orcid": "0000-0001-5414-5131", "clpid": "Dickinson-Mark-E" }, { "family_name": "Wang", "given_name": "Yun", "clpid": "Wang-Yun" }, { "family_name": "Bartlett", "given_name": "James", "clpid": "Bartlett-James" }, { "family_name": "Behroozi", "given_name": "Peter", "clpid": "Behroozi-P-S" }, { "family_name": "Brinchmann", "given_name": "Jarle", "clpid": "Brinchmann-J" }, { "family_name": "Capak", "given_name": "Peter", "orcid": "0000-0003-3578-6843", "clpid": "Capak-P" }, { "family_name": "Chary", "given_name": "Ranga", "orcid": "0000-0001-7583-0621", "clpid": "Chary-R-R" }, { "family_name": "Cimatti", "given_name": "Andrea", "clpid": "Cimatti-A" }, { "family_name": "Coil", "given_name": "Alison", "clpid": "Coil-A-L" }, { "family_name": "Conroy", "given_name": "Charlie", "orcid": "0000-0002-1590-8551", "clpid": "Conroy-C" }, { "family_name": "Daddi", "given_name": "Emanuele", "orcid": "0000-0002-3331-9590", "clpid": "Daddi-Emanuele" }, { "family_name": "Donahue", "given_name": "Megan", "orcid": "0000-0002-2808-0853", "clpid": "Donahue-Megan" }, { "family_name": "Eisenhardt", "given_name": "Peter", "clpid": "Eisenhardt-P-R-M" }, { "family_name": "Ferguson", "given_name": "Henry C.", "orcid": "0000-0001-7113-2738", "clpid": "Ferguson-H-C" }, { "family_name": "Furlanetto", "given_name": "Steve", "orcid": "0000-0002-0658-1243", "clpid": "Furlanetto-S-R" }, { "family_name": "Glazebrook", "given_name": "Karl", "clpid": "Glazebrook-K" }, { "family_name": "Gonzalez", "given_name": "Anthony", "orcid": "0000-0002-0933-8601", "clpid": "Gonzalez-A-H" }, { "family_name": "Helou", "given_name": "George", "orcid": "0000-0003-3367-3415", "clpid": "Helou-G" }, { "family_name": "Hopkins", "given_name": "Philip F.", "orcid": "0000-0003-3729-1684", "clpid": "Hopkins-P-F" }, { "family_name": "Kartaltepe", "given_name": "Jeyhan", "orcid": "0000-0001-9187-3605", "clpid": "Kartaltepe-J" }, { "family_name": "Lee", "given_name": "Janice", "orcid": "0000-0002-2278-9407", "clpid": "Lee-Janice-C" }, { "family_name": "Malhotra", "given_name": "Sangeeta", "orcid": "0000-0002-9226-5350", "clpid": "Malhotra-S" }, { "family_name": "Marshall", "given_name": "Jennifer", "clpid": "Marshall-J-L" }, { "family_name": "Newman", "given_name": "Jeffrey A.", "orcid": "0000-0001-8684-2222", "clpid": "Newman-J-A" }, { "family_name": "Orsi", "given_name": "Alvaro", "clpid": "Orsi-Alvaro" }, { "family_name": "Rhoads", "given_name": "James", "orcid": "0000-0002-1501-454X", "clpid": "Rhoads-J-E" }, { "family_name": "Rhodes", "given_name": "Jason", "orcid": "0000-0002-4485-8549", "clpid": "Rhodes-J-D" }, { "family_name": "Shapley", "given_name": "Alice", "orcid": "0000-0003-3509-4855", "clpid": "Shapley-A-E" }, { "family_name": "Wechsler", "given_name": "Risa H.", "orcid": "0000-0003-2229-011X", "clpid": "Wechsler-R-H" } ], "abstract": "Galaxies form and evolve in the context of their local and large-scale environments. Their baryonic content that we observe with imaging and spectroscopy is intimately connected to the properties of their dark matter halos, and to their location in the \"cosmic web\" of large-scale structure. Very large spectroscopic surveys of the local universe (e.g., SDSS and GAMA) measure galaxy positions (location within large-scale structure), statistical clustering (a direct constraint on dark matter halo masses), and spectral features (measuring physical conditions of the gas and stars within the galaxies, as well as internal velocities). Deep surveys with the James Webb Space Telescope (JWST) will revolutionize spectroscopic measurements of redshifts and spectral properties for galaxies out to the epoch of reionization, but with numerical statistics and over cosmic volumes that are too small to map large-scale structure and to constrain halo properties via clustering. Here, we consider advances in understanding galaxy evolution that would be enabled by very large spectroscopic surveys at high redshifts: very large numbers of galaxies (outstanding statistics) over large co-moving volumes (large-scale structure on all scales) over broad redshift ranges (evolution over most of cosmic history). The required observational facility can be established as part of the probe portfolio by NASA within the next decade.", "doi": "10.48550/arXiv.1903.07409", "publisher": "arXiv", "publication_date": "2019-03-14" } ]