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Start Over Author "Worley, C." Publisher european southern observatory (eso)
6 results on '"Worley, C."'

1. HD 74438: a Young Spectroscopic Quadruple as a Possible Progenitor of Supernovae Ia

Author

Merle, Thibault, Hamers, Adrian S., Van Eck, Sophie, Jorissen, Alain, Van Der Swaelmen, Mathieu, Pollard, Karen, Smiljanic, Rodolfo, Pourbaix, Dimitri, Zwitter, Tomaž, Traven, Gregor, Gilmore, Gerry, Randich, Sofia, Gonneau, Anaïs, Hourihane, Anna, Sacco, Germano, and Worley, C. Clare

Abstract

Type Ia supernovae (SN Ia) are amongst the most energetic events in the Universe. They are used as standard candles to measure cosmological distances and they produce a rich nucleosynthesis; they are fundamental objects to understand the chemical evolution of galaxies. It is thought that SN Ia are produced by processes occurring in tight binaries including at least one carbon–oxygen white dwarf (WD). Such binaries could emerge from the dynamical evolution of high-multiplicity stellar systems such as the young spectroscopic quadruple HD 74438, recently detected in the Gaia–ESO Survey. Follow-up spectroscopic observations in South Africa and New Zealand, as well as the use of archival ESO spectra, allow us to characterise its orbital and astrophysical parameters. Modelling the dynamical evolution of stellar quadruples shows that such systems can produce WD mergers, possible progenitors of SN Ia., Published in The Messenger vol. 188, pp. 26-29, September 2022.

Published
2022
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2. 4MOST Survey Strategy Plan

Author

Guiglion, Guillaume, Battistini, Chiara, Bell, Cameron P. M., Bensby, Thomas, Boller, Thomas, Chiappini, Cristina, Comparat, Johan, Christlieb, Norbert, Church, Ross, Cioni, Maria-Rosa L., Davies, Luke, Dwelly, Tom, De Jong, Roelof S., Feltzing, Sofia, Gueguen, Alain, Howes, Louise, Irwin, Mike, Kushniruk, Iryna, Lam, Man I, Liske, Jochen, McMahon, Richard, Merloni, Andrea, Norberg, Peder, Robotham, Aaron S. G., Schnurr, Olivier, Sorce, Jenny G., Starkenburg, Else, Storm, Jesper, Swann, Elizabeth, Tempel, Elmo, Thi, Wing-Fai, Worley, C. Clare, Walcher, C. Jakob, and The 4MOST Collaboration

Abstract

The current status of and motivation for the 4MOST survey strategy, as developed by the Consortium science team, are presented here. Key elements of the strategy are described, such as sky coverage, number of visits and total exposure times in different parts of the sky, and how to deal with different observing conditions. The task of organising the strategy is not simple, with many different surveys that have vastly different target brightnesses and densities, sample completeness levels, and signal-to-noise requirements. We introduce here a number of concepts that we will use to ensure all surveys are optimised. Astronomers who are planning to submit a Participating Survey proposal are strongly encouraged to read this article and any relevant 4MOST Survey articles in this issue of The Messenger such that they can optimally complement and benefit from the planned surveys of the 4MOST Consortium.

Published
2019

3. 4MOST Scientific Operations

Author

Walcher, C., Banerji, M., Battistini, C., Bell, C., Bellido-Tirado, O., Bensby, T., Bestenlehner, J., Boller, T., Brynnel, J., Casey, A., Chiappini, C., Christlieb, N., Church, R., Cioni, M., Croom, S., Comparat, J., Davies, L., de Jong, R., Dwelly, T., Enke, H., Feltzing, S., Feuillet, D., Fouesneau, M., Ford, D., Frey, S., Gonzalez-Solares, E., Gueguen, A., Howes, L., Irwin, M., Klar, J., Kordopatis, G., Korn, A., Krumpe, M., Kushniruk, I., Lam, M., Lewis, J., Lind, K., Liske, J., Loveday, J., Mainieri, V., Martell, S., Matijevic, G., McMahon, R., Merloni, A., Murphy, D., Niederhofer, F., Norberg, P., Pramskiy, A., Romaniello, M., Robotham, A., Rothmaier, F., Ruchti, G., Schnurr, O., Schwope, A., Smedley, S., Sorce, J., Starkenburg, E., Stilz, I., Storm, J., Tempel, E., Thi, W., Traven, G., Valentini, M., van den Ancker, M., Walton, N., Winkler, R., and Worley, C.

Abstract

The 4MOST instrument is a multi-object spectrograph that will address Galactic and extragalactic science cases simultaneously by observing targets from a large number of different surveys within each science exposure. This parallel mode of operation and the survey nature of 4MOST require some distinct 4MOST- specific operational features within the overall operations model of ESO. The main feature is that the 4MOST Consortium will deliver, not only the instrument, but also contractual services to the user community, which is why 4MOST is also described as a facility. This white paper concentrates on information particularly useful to answering the forthcoming Call for Letters of Intent.

Published
2019

4. 4MOST Survey Strategy Plan

Author

Guiglion, Guillaume, Battistini, Chiara, Bell, Cameron P. M., Bensby, Thomas, Boller, Thomas, Chiappini, Cristina, Comparat, Johan, Christlieb, Norbert, Church, Ross, Cioni, Maria-Rosa L., Davies, Luke, Dwelly, Tom, De Jong, Roelof S., Feltzing, Sofia, Gueguen, Alain, Howes, Louise, Irwin, Mike, Kushniruk, Iryna, Lam, Man I, Liske, Jochen, McMahon, Richard, Merloni, Andrea, Norberg, Peder, Robotham, Aaron S. G., Schnurr, Olivier, Sorce, Jenny G., Starkenburg, Else, Storm, Jesper, Swann, Elizabeth, Tempel, Elmo, Thi, Wing-Fai, Worley, C. Clare, Walcher, C. Jakob, and The 4MOST Collaboration

Subjects
010308 nuclear & particles physics, 0103 physical sciences, 010303 astronomy & astrophysics, 01 natural sciences
Abstract

The current status of and motivation for the 4MOST survey strategy, as developed by the Consortium science team, are presented here. Key elements of the strategy are described, such as sky coverage, number of visits and total exposure times in different parts of the sky, and how to deal with different observing conditions. The task of organising the strategy is not simple, with many different surveys that have vastly different target brightnesses and densities, sample completeness levels, and signal-to-noise requirements. We introduce here a number of concepts that we will use to ensure all surveys are optimised. Astronomers who are planning to submit a Participating Survey proposal are strongly encouraged to read this article and any relevant 4MOST Survey articles in this issue of The Messenger such that they can optimally complement and benefit from the planned surveys of the 4MOST Consortium., Published in The Messenger vol. 175, pp. 17-21, March 2019.

5. 4MOST Scientific Operations

Author

Walcher, C. Jakob, Banerji, Manda, Battistini, Chiara, Bell, Cameron P. M., Bellido-Tirado, Olga, Bensby, Thomas, Bestenlehner, Joachim M., Boller, Thomas, Brynnel, Joar, Casey, Andrew, Chiappini, Cristina, Christlieb, Norbert, Church, Ross, Cioni, Maria-Rosa L., Croom, Scott, Comparat, Johan, Davies, Luke J. M., De Jong, Roelof S., Dwelly, Tom, Enke, Harry, Feltzing, Sofia, Feuillet, Diane, Fouesneau, Morgan, Ford, Dominic, Frey, Steffen, Gonzalez-Solares, Eduardo, Gueguen, Alain, Howes, Louise, Irwin, Mike, Klar, Jochen, Kordopatis, Georges, Korn, Andreas, Krumpe, Mirko, Kushniruk, Iryna, Lam, Man I, Lewis, James, Lind, Karin, Liske, Jochen, Loveday, Jon, Mainieri, Vincenzo, Martell, Sarah, Matijevic, Gal, McMahon, Richard, Merloni, Andrea, Murphy, David, Niederhofer, Florian, Norberg, Peder, Pramskiy, Alexander, Romaniello, Martino, Robotham, Aaron S. G., Rothmaier, Florian, Ruchti, Gregory, Schnurr, Olivier, Schwope, Axel, Smedley, Scott, Sorce, Jenny, Starkenburg, Else, Stilz, Ingo, Storm, Jesper, Tempel, Elmo, Thi, Wing-Fai, Traven, Gregor, Valentini, Marica, Van Den Ancker, Mario, Walton, Nicholas, Winkler, Roland, and Worley, C. Clare

Subjects
010308 nuclear & particles physics, 0103 physical sciences, 010303 astronomy & astrophysics, 01 natural sciences
Abstract

The 4MOST instrument is a multi-object spectrograph that will address Galactic and extragalactic science cases simultaneously by observing targets from a large number of different surveys within each science exposure. This parallel mode of operation and the survey nature of 4MOST require some distinct 4MOST- specific operational features within the overall operations model of ESO. The main feature is that the 4MOST Consortium will deliver, not only the instrument, but also contractual services to the user community, which is why 4MOST is also described as a facility. This white paper concentrates on information particularly useful to answering the forthcoming Call for Letters of Intent., Published in The Messenger vol. 175, pp. 12-16, March 2019.

6. 4MOST: Project overview and information for the First Call for Proposals

Author

De Jong, Roelof S., Agertz, Oscar, Berbel, Alex Agudo, Aird, James, Alexander, David A., Amarsi, Anish, Anders, Friedrich, Andrae, Rene, Ansarinejad, Behzad, Ansorge, Wolfgang, Antilogus, Pierre, Anwand-Heerwart, Heiko, Arentsen, Anke, Arnadottir, Anna, Asplund, Martin, Auger, Matt, Azais, Nicolas, Baade, Dietrich, Baker, Gabriella, Baker, Sufyan, Balbinot, Eduardo, Baldry, Ivan K., Banerji, Manda, Barden, Samuel, Barklem, Paul, Barthélémy-Mazot, Eléonore, Battistini, Chiara, Bauer, Svend, Bell, Cameron P. M., Bellido-Tirado, Olga, Bellstedt, Sabine, Belokurov, Vasily, Bensby, Thomas, Bergemann, Maria, Bestenlehner, Joachim M., Bielby, Richard, Bilicki, Maciej, Blake, Chris, Bland-Hawthorn, Joss, Boeche, Corrado, Boland, Wilfried, Boller, Thomas, Bongard, Sebastien, Bongiorno, Angela, Bonifacio, Piercarlo, Boudon, Didier, Brooks, David, Brown, Michael J. I., Brown, Rebecca, Brüggen, Marcus, Brynnel, Joar, Brzeski, Jurek, Buchert, Thomas, Buschkamp, Peter, Caffau, Elisabetta, Caillier, Patrick, Carrick, Jonathan, Casagrande, Luca, Case, Scott, Casey, Andrew, Cesarini, Isabella, Cescutti, Gabriele, Chapuis, Diane, Chiappini, Cristina, Childress, Michael, Christlieb, Norbert, Church, Ross, Cioni, Maria-Rosa L., Cluver, Michelle, Colless, Matthew, Collett, Thomas, Comparat, Johan, Cooper, Andrew, Couch, Warrick, Courbin, Frederic, Croom, Scott, Croton, Darren, Daguisé, Eric, Dalton, Gavin, Davies, Luke J. M., Davis, Tamara, De Laverny, Patrick, Deason, Alis, Dionies, Frank, Disseau, Karen, Doel, Peter, Döscher, Daniel, Driver, Simon P., Dwelly, Tom, Eckert, Dominique, Edge, Alastair, Edvardsson, Bengt, Youssoufi, Dalal El, Elhaddad, Ahmed, Enke, Harry, Erfanianfar, Ghazaleh, Farrell, Tony, Fechner, Thomas, Feiz, Carmen, Feltzing, Sofia, Ferreras, Ignacio, Feuerstein, Dietrich, Feuillet, Diane, Finoguenov, Alexis, Ford, Dominic, Fotopoulou, Sotiria, Fouesneau, Morgan, Frenk, Carlos, Frey, Steffen, Gaessler, Wolfgang, Geier, Stephan, Fusillo, Nicola Gentile, Gerhard, Ortwin, Giannantonio, Tommaso, Giannone, Domenico, Gibson, Brad, Gillingham, Peter, González-Fernández, Carlos, Gonzalez-Solares, Eduardo, Gottloeber, Stefan, Gould, Andrew, Grebel, Eva K., Gueguen, Alain, Guiglion, Guillaume, Haehnelt, Martin, Hahn, Thomas, Hansen, Camilla J., Hartman, Henrik, Hauptner, Katja, Hawkins, Keith, Haynes, Dionne, Haynes, Roger, Heiter, Ulrike, Helmi, Amina, Aguayo, Cesar Hernandez, Hewett, Paul, Hinton, Samuel, Hobbs, David, Hoenig, Sebastian, Hofman, David, Hook, Isobel, Hopgood, Joshua, Hopkins, Andrew, Hourihane, Anna, Howes, Louise, Howlett, Cullan, Huet, Tristan, Irwin, Mike, Iwert, Olaf, Jablonka, Pascale, Jahn, Thomas, Jahnke, Knud, Jarno, Aurélien, Jin, Shoko, Jofre, Paula, Johl, Diana, Jones, Damien, Jönsson, Henrik, Jordan, Carola, Karovicova, Iva, Khalatyan, Arman, Kelz, Andreas, Kennicutt, Robert, King, David, Kitaura, Francisco, Klar, Jochen, Klauser, Urs, Kneib, Jean-Paul, Koch, Andreas, Koposov, Sergey, Kordopatis, Georges, Korn, Andreas, Kosmalski, Johan, Kotak, Rubina, Kovalev, Mikhail, Kreckel, Kathryn, Kripak, Yevgen, Krumpe, Mirko, Kuijken, Koen, Kunder, Andrea, Kushniruk, Iryna, Lam, Man I, Lamer, Georg, Laurent, Florence, Lawrence, Jon, Lehmitz, Michael, Lemasle, Bertrand, Lewis, James, Li, Baojiu, Lidman, Chris, Lind, Karin, Liske, Jochen, Lizon, Jean-Louis, Loveday, Jon, Ludwig, Hans-Günter, McDermid, Richard M., Maguire, Kate, Mainieri, Vincenzo, Mali, Slavko, Mandel, Holger, Mandel, Kaisey, Mannering, Liz, Martell, Sarah, Delgado, David Martinez, Matijevic, Gal, McGregor, Helen, McMahon, Richard, McMillan, Paul, Mena, Olga, Merloni, Andrea, Meyer, Martin J., Michel, Christophe, Micheva, Genoveva, Migniau, Jean-Emmanuel, Minchev, Ivan, Monari, Giacomo, Muller, Rolf, Murphy, David, Muthukrishna, Daniel, Nandra, Kirpal, Navarro, Ramon, Ness, Melissa, Nichani, Vijay, Nichol, Robert, Nicklas, Harald, Niederhofer, Florian, Norberg, Peder, Obreschkow, Danail, Oliver, Seb, Owers, Matt, Pai, Naveen, Pankratow, Sergei, Parkinson, David, Paschke, Jens, Paterson, Robert, Pecontal, Arlette, Parry, Ian, Phillips, Dan, Pillepich, Annalisa, Pinard, Laurent, Pirard, Jeff, Piskunov, Nikolai, Plank, Volker, Plüschke, Dennis, Pons, Estelle, Popesso, Paola, Power, Chris, Pragt, Johan, Pramskiy, Alexander, Pryer, Dan, Quattri, Marco, Queiroz, Anna Barbara De Andrade, Quirrenbach, Andreas, Rahurkar, Swara, Raichoor, Anand, Ramstedt, Sofia, Rau, Arne, Recio-Blanco, Alejandra, Reiss, Roland, Renaud, Florent, Revaz, Yves, Rhode, Petra, Richard, Johan, Richter, Amon David, Rix, Hans-Walter, Robotham, Aaron S. G., Roelfsema, Ronald, Romaniello, Martino, Rosario, David, Rothmaier, Florian, Roukema, Boudewijn, Ruchti, Gregory, Rupprecht, Gero, Rybizki, Jan, Ryde, Nils, Saar, Andre, Sadler, Elaine, Sahlén, Martin, Salvato, Mara, Sassolas, Benoit, Saunders, Will, Saviauk, Allar, Sbordone, Luca, Schmidt, Thomas, Schnurr, Olivier, Scholz, Ralf-Dieter, Schwope, Axel, Seifert, Walter, Shanks, Tom, Sheinis, Andrew, Sivov, Tihomir, Skúladóttir, Ása, Smartt, Stephen, Smedley, Scott, Smith, Greg, Smith, Robert, Sorce, Jenny, Spitler, Lee, Starkenburg, Else, Steinmetz, Matthias, Stilz, Ingo, Storm, Jesper, Sullivan, Mark, Sutherland, William, Swann, Elizabeth, Tamone, Amélie, Taylor, Edward N., Teillon, Julien, Tempel, Elmo, Ter Horst, Rik, Thi, Wing-Fai, Tolstoy, Eline, Trager, Scott, Traven, Gregor, Tremblay, Pier-Emmanuel, Tresse, Laurence, Valentini, Marica, Van De Weygaert, Rien, Van Den Ancker, Mario, Veljanoski, Jovan, Venkatesan, Sudharshan, Wagner, Lukas, Wagner, Karl, Walcher, C. Jakob, Waller, Lew, Walton, Nicholas, Wang, Lingyu, Winkler, Roland, Wisotzki, Lutz, Worley, C. Clare, Worseck, Gabor, Xiang, Maosheng, Xu, Wenli, Yong, David, Zhao, Cheng, Zheng, Jessica, Zscheyge, Florian, and Zucker, Daniel

Subjects
010308 nuclear & particles physics, 0103 physical sciences, 010303 astronomy & astrophysics, 01 natural sciences
Abstract

We introduce the 4-metre Multi-Object Spectroscopic Telescope (4MOST), a new high-multiplex, wide-field spectroscopic survey facility under development for the four-metre-class Visible and Infrared Survey Telescope for Astronomy (VISTA) at Paranal. Its key specifications are: a large field of view (FoV) of 4.2 square degrees and a high multiplex capability, with 1624 fibres feeding two low-resolution spectrographs (R = λ/Δλ ~ 6500), and 812 fibres transferring light to the high-resolution spectrograph (R ~ 20 000). After a description of the instrument and its expected performance, a short overview is given of its operational scheme and planned 4MOST Consortium science; these aspects are covered in more detail in other articles in this edition of The Messenger. Finally, the processes, schedules, and policies concerning the selection of ESO Community Surveys are presented, commencing with a singular opportunity to submit Letters of Intent for Public Surveys during the first five years of 4MOST operations., Published in The Messenger vol. 175, pp. 3-11, March 2019.

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