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Browsing by Author "Caselli, P."

Browsing by Author "Caselli, P."

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  • The Chemical Structure of Young High-mass Star-forming Clumps. II. Parsec-scale CO Depletion and Deuterium Fraction of HCO<SUP>+</SUP> 
    Feng, S.; Li, D.; Caselli, P.; Du, F.; Lin, Y.; Sipilä, O.; Beuther, H.; Sanhueza, Patricio; Tatematsu, K.; Liu, S. Y.; Zhang, Qizhou; Wang, Y.; Hogge, T.; Jimenez-Serra, I.; Lu, X.; Liu, T.; Wang, K.; Zhang, Z. Y.; Zahorecz, S.; Li, G.; Liu, H. B.; Yuan, J. (2020)
    The physical and chemical properties of cold and dense molecular clouds are key to understanding how stars form. Using the IRAM 30 m and NRO 45 m telescopes, we carried out a Multiwavelength line-Imaging survey of the 70 ...
  • Complex, quiescent kinematics in a highly filamentary infrared dark cloud 
    Henshaw, J. D.; Caselli, P.; Fontani, F.; Jiménez-Serra, I.; Tan, J. C.; Hernandez, A. K. (2013)
    Infrared dark clouds (IRDCs) host the initial conditions under which massive stars and stellar clusters form. It is therefore important to study the kinematics, as well as the physical and chemical properties of these ...
  • Dense gas in IRAS 20343+4129: an ultracompact H II region caught in the act of creating a cavity 
    Fontani, F.; Palau, Aina; Busquet, G.; Isella, A.; Estalella, R.; Sanchez-Monge, Á.; Caselli, P.; Zhang, Qizhou (2012)
    The intermediate- to high-mass star-forming region IRAS 20343+4129 is an excellent laboratory to study the influence of high- and intermediate-mass young stellar objects on nearby starless dense cores, and investigate for ...
  • Deuteration as an evolutionary tracer in massive-star formation 
    Fontani, F.; Palau, A.; Caselli, P.; Sánchez-Monge, Á.; Butler, M. J.; Tan, J. C.; Jiménez-Serra, I.; Busquet, G.; Leurini, S.; Audard, M. (2011)
    Context. Theory predicts, and observations confirm, that the column density ratio of a molecule containing D to its counterpart containing H can be used as an evolutionary tracer in the low-mass star formation process. ...
  • Deuteration of ammonia in the starless core Ophiuchus/H-MM1 
    Harju, J.; Daniel, F.; Sipilä, O.; Caselli, P.; Pineda, J. E.; Friesen, R. K.; Punanova, A.; Güsten, R.; Wiesenfeld, L.; Myers, P. C.; Faure, A.; Hily-Blant, P.; Rist, C.; Rosolowsky, E.; Schlemmer, S.; Shirley, Y. L. (2017)
    Context. Ammonia and its deuterated isotopologues probe physical conditions in dense molecular cloud cores. The time-dependence of deuterium fractionation and the relative abundances of different nuclear spin modifications ...
  • Gas phase Elemental abundances in Molecular cloudS (GEMS). II. On the quest for the sulphur reservoir in molecular clouds: the H<SUB>2</SUB>S case 
    Navarro-Almaida, D.; Le Gal, Romane; Fuente, A.; Rivière-Marichalar, P.; Wakelam, V.; Cazaux, S.; Caselli, P.; Laas, J. C.; Alonso-Albi, T.; Loison, J. C.; Gerin, M.; Kramer, C.; Roueff, E.; Bachiller, R.; Commerçon, B.; Friesen, R.; García-Burillo, S.; Goicoechea, J. R.; Giuliano, B. M.; Jiménez-Serra, I.; Kirk, J. M.; Lattanzi, V.; Malinen, J.; Marcelino, N.; Martín-Domènech, Rafael; Muñoz Caro, G. M.; Pineda, J.; Tercero, B.; Treviño-Morales, S. P.; Roncero, O.; Hacar, A.; Tafalla, M.; Ward-Thompson, D. (2020)
    Context. Sulphur is one of the most abundant elements in the Universe. Surprisingly, sulphuretted molecules are not as abundant as expected in the interstellar medium and the identity of the main sulphur reservoir is still ...
  • Gas phase Elemental abundances in Molecular cloudS (GEMS). III. Unlocking the CS chemistry: the CS+O reaction 
    Bulut, N.; Roncero, O.; Aguado, A.; Loison, J. -C; Navarro-Almaida, D.; Wakelam, V.; Fuente, A.; Roueff, E.; Le Gal, Romane; Caselli, P.; Gerin, M.; Hickson, K. M.; Spezzano, S.; Riviére-Marichalar, P.; Alonso-Albi, T.; Bachiller, R.; Jiménez-Serra, I.; Kramer, C.; Tercero, B.; Rodriguez-Baras, M.; García-Burillo, S.; Goicoechea, J. R.; Treviño-Morales, S. P.; Esplugues, G.; Cazaux, S.; Commercon, B.; Laas, J.; Kirk, J.; Lattanzi, V.; Martín-Doménech, Rafael; Muñoz-Caro, G.; Pineda, J.; Ward-Thompson, D.; Tafalla, M.; Marcelino, N.; Malinen, J.; Friesen, R.; Giuliano, B. M.; Agúndez, M.; Hacar, A. (2021)
    Context. Carbon monosulphide (CS) is among the most abundant gas-phase S-bearing molecules in cold dark molecular clouds. It is easily observable with several transitions in the millimeter wavelength range, and has been ...
  • Gas phase Elemental abundances in Molecular cloudS (GEMS). VI. A sulphur journey across star-forming regions: study of thioformaldehyde emission 
    Esplugues, G.; Fuente, A.; Navarro-Almaida, D.; Rodríguez-Baras, M.; Majumdar, L.; Caselli, P.; Wakelam, V.; Roueff, E.; Bachiller, R.; Spezzano, S.; Rivière-Marichalar, P.; Martín-Doménech, R.; Muñoz Caro, G. M. (2022)
    Context. In the context of the IRAM 30 m Large Program Gas phase Elemental abundances in Molecular CloudS (GEMS), we present a study of thioformaldehyde (H<SUB>2</SUB>CS) and its deuterated versions (HDCS and D<SUB>2</SUB>CS) ...
  • Gas phase Elemental abundances in Molecular cloudS (GEMS). VII. Sulfur elemental abundance 
    Fuente, A.; Rivière-Marichalar, P.; Beitia-Antero, L.; Caselli, P.; Wakelam, V.; Esplugues, G.; Rodríguez-Baras, M.; Navarro-Almaida, D.; Gerin, M.; Kramer, C.; Bachiller, R.; Goicoechea, J. R.; Jiménez-Serra, I.; Loison, J. C.; Ivlev, A.; Martín-Doménech, R.; Spezzano, S.; Roncero, O.; Muñoz-Caro, G.; Cazaux, S.; Marcelino, N. (2023)
    Context. Gas phase Elemental abundances in molecular CloudS (GEMS) is an IRAM 30-m Large Program aimed at determining the elemental abundances of carbon (C), oxygen (O), nitrogen (N), and sulfur (S) in a selected set of ...
  • The Green Bank Ammonia Survey: Unveiling the Dynamics of the Barnard 59 Star-forming Clump 
    Redaelli, E.; Alves, F. O.; Caselli, P.; Pineda, J. E.; Friesen, R. K.; Chacón-Tanarro, A.; Matzner, C. D.; Ginsburg, A.; Rosolowsky, E.; Keown, J.; Offner, S. S. R.; Di Francesco, J.; Kirk, H.; Myers, P. C.; Hacar, A.; Cimatti, A.; Chen, H. H.; Chen, M. C.; Lee, K. I.; Seo, Y. M. (2017)
    Understanding the early stages of star formation is a research field of ongoing development, both theoretically and observationally. In this context, molecular data have been continuously providing observational constraints ...
  • H2D+ in the High-mass Star-forming Region Cygnus X 
    Pillai, T.; Caselli, P.; Kauffmann, J.; Zhang, Qizhou; Thompson, M. A.; Lis, D. C. (2012)
    H<SUB>2</SUB>D<SUP>+</SUP> is a primary ion that dominates the gas-phase chemistry of cold dense gas. Therefore, it is hailed as a unique tool in probing the earliest, prestellar phase of star formation. Observationally, ...
  • Interstellar Detection of c-C3D2 
    Spezzano, S.; Brünken, S.; Schilke, P.; Caselli, P.; Menten, K. M.; McCarthy, M. C.; Bizzocchi, L.; Trevinõ-Morales, S. P.; Aikawa, Y.; Schlemmer, S. (2013)
    We report the first interstellar detection of c-C<SUB>3</SUB>D<SUB>2</SUB>. Doubly deuterated cyclopropenylidene, a carbene, has been detected toward the starless cores TMC-1C and L1544 using the IRAM 30 m telescope. The ...
  • L1157-B1: Water and Ammonia as Diagnostics of Shock Temperature 
    Viti, S.; Jimenez-Serra, I.; Yates, J. A.; Codella, C.; Vasta, M.; Caselli, P.; Lefloch, B.; Ceccarelli, C. (2011)
    We investigate the origin and nature of the profiles of water and ammonia observed toward the L1157-B1 clump as part of the HIFI CHESS survey using a new code coupling a gas-grain chemical model with a parametric shock ...
  • Magnetic field in a young circumbinary disk 
    Alves, F. O.; Girart, J. M.; Padovani, M.; Galli, D.; Franco, G. A. P.; Caselli, P.; Vlemmings, W. H. T.; Zhang, Qizhou; Wiesemeyer, H. (2018)
    Context. Polarized continuum emission at millimeter-to-submillimeter wavelengths is usually attributed to thermal emission from dust grains aligned through radiative torques with the magnetic field. However, recent theoretical ...
  • Mapping water in protostellar outflows with Herschel. PACS and HIFI observations of L1448-C 
    Nisini, B.; Santangelo, G.; Antoniucci, S.; Benedettini, M.; Codella, C.; Giannini, T.; Lorenzani, A.; Liseau, R.; Tafalla, M.; Bjerkeli, P.; Cabrit, S.; Caselli, P.; Kristensen, L.; Neufeld, D.; Melnick, G.; van Dishoeck, E. F. (2013)
    Context. Water is a key probe of shocks and outflows from young stars because it is extremely sensitive to both the physical conditions associated with the interaction of supersonic outflows with the ambient medium and the ...
  • Multi-line detection of O2 toward ? Ophuichi A 
    Liseau, R.; Goldsmith, P. F.; Larsson, B.; Pagani, L.; Bergman, P.; Le Bourlot, J.; Bell, T. A.; Benz, A. O.; Bergin, E. A.; Bjerkeli, P.; Black, J. H.; Bruderer, S.; Caselli, P.; Caux, E.; Chen, J. -H; de Luca, M.; Encrenaz, P.; Falgarone, E.; Gerin, M.; Goicoechea, J. R.; Hjalmarson, Å.; Hollenbach, D. J.; Justtanont, K.; Kaufman, M. J.; Le Petit, F.; Li, D.; Lis, D. C.; Melnick, G. J.; Nagy, Z.; Olofsson, A. O. H.; Olofsson, G.; Roueff, E.; Sandqvist, Aa; Snell, R. L.; van der Tak, Floris; van Dishoeck, E. F.; Vastel, C.; Viti, S.; Yildiz, U. A. (2012)
    Context. Models of pure gas-phase chemistry in well-shielded regions of molecular clouds predict relatively high levels of molecular oxygen, O<SUB>2</SUB>, and water, H<SUB>2</SUB>O. These high abundances imply high cooling ...
  • NH3 (10-00) in the pre-stellar core L1544 
    Caselli, P.; Bizzocchi, L.; Keto, E.; Sipilä, O.; Tafalla, M.; Pagani, L.; Kristensen, L. E.; van der Tak, F. F. S.; Walmsley, C. M.; Codella, C.; Nisini, B.; Aikawa, Y.; Faure, A.; van Dishoeck, E. F. (2017)
    Pre-stellar cores represent the initial conditions in the process of star and planet formation, therefore it is important to study their physical and chemical structure. Because of their volatility, nitrogen-bearing molecules ...
  • Origins space telescope: from first light to life 
    Wiedner, M. C.; Aalto, S.; Armus, L.; Bergin, E.; Birkby, J.; Bradford, C. M.; Burgarella, D.; Caselli, P.; Charmandaris, V.; Cooray, A.; De Beck, E.; Desert, J. M.; Gerin, M.; Goicoechea, J.; Griffin, M.; Hartogh, P.; Helmich, F.; Hogerheijde, M.; Hunt, L.; Karska, A.; Kral, Q.; Leisawitz, D.; Melnick, Gary; Meixner, M.; Matsuura, M.; Milam, S.; Pearson, C.; Pesce, Dominic W.; Pontoppidan, K. M.; Pope, A.; Rigopoulou, D.; Roellig, T.; Sakon, I.; Staguhn, J.; Stevenson, K. (2021)
    The Origins Space Telescope (Origins) is one of four science and technology definition studies selected by the National Aeronautics and Space Administration (NASA) in preparation of the 2020 Astronomy and Astrophysics ...
  • Revealing H2D+ Depletion and Compact Structure in Starless and Protostellar Cores with ALMA 
    Friesen, R. K.; Di Francesco, J.; Bourke, T. L.; Caselli, P.; Jørgensen, J. K.; Pineda, J. E.; Wong, M. (2014)
    We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of the submillimeter dust continuum and H<SUB>2</SUB>D<SUP>+</SUP> 1<SUB>10</SUB>-1<SUB>11</SUB> emission toward two evolved, potentially protostellar ...
  • Revealing the dust grain size in the inner envelope of the Class I protostar Per-emb-50 
    Agurto-Gangas, C.; Pineda, J. E.; Szucs, L.; Testi, L.; Tazzari, M.; Miotello, A.; Caselli, P.; Dunham, M.; Stephens, Ian W.; Bourke, T. L. (2019)
    Context. A good constraint of when the growth of dust grains from sub-micrometer to millimeter sizes occurs, is crucial for planet formation models. This provides the first step towards the production of pebbles and ...

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