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53. Theia: Faint objects in motion or the new astrometry frontier

Author

Boehm, Celine, Krone Martins, Alberto, Amorim, Antonio, Anglada Escude, Guillem, Brandeker, Alexis, Courbin, Frederic, Ensslin, Torsten, Falcao, Antonio, Freese, Katherine, Holl, Berry, Labadie, Lucas, Leger, Alain, Malbet, Fabien, Mamon, Gary, Mcarthur, Barbara, Mora, Alcione, Shao, Michael, Sozzetti, Alessandro, Spolyar, Douglas, Villaver, Eva, Albertus, Conrado, Bertone, Stefano, Bouy, Herve, Boylan Kolchin, Michael, Brown, Anthony, Brown, Warren, Cardoso, Vitor, Chemin, Laurent, Claudi, Riccardo, Correia, Alexandre C. M., Crosta, Mariateresa, Crouzier, Antoine, Cyr Racine, Francis Yan, Damasso, Mario, da Silva, Antonio, Davies, Melvyn, Das, Payel, Dayal, Pratika, de Val Borro, Miguel, Diaferio, Antonaldo, Erickcek, Adrienne, Fairbairn, Malcolm, Fortin, Morgane, Fridlund, Malcolm, Garcia, Paulo, Gnedin, Oleg, Goobar, Ariel, Gordo, Paulo, Goullioud, Renaud, Hambly, Nigel, Hara, Nathan, Hobbs, David, Hog, Erik, Holland, Andrew, Ibata, Rodrigo, Jordi, Carme, Klioner, Sergei, Kopeikin, Sergei, Lacroix, Thomas, Laskar, Jacques, Le Poncin Lafitte, Christophe, Luri, Xavier, Majumdar, Subhabrata, Makarov, Valeri, Massey, Richard, Mennesson, Bertrand, Michalik, Daniel, Moitinho de Almeida, Andre, Mourao, Ana, Moustakas, Leonidas, Murray, Neil, Muterspaugh, Matthew, Oertel, Micaela, Ostorero, Luisa, Perez Garcia, Angeles, Platais, Imants, de Mora, Jordi Portell i, Quirrenbach, Andreas, Randall, Lisa, Read, Justin, Regos, Eniko, Rory, Barnes, Rybicki, Krzysztof, Scott, Pat, Schneider, Jean, Scholtz, Jakub, Siebert, Arnaud, Tereno, Ismael, Tomsick, John, Traub, Wesley, Valluri, Monica, Walker, Matt, Walton, Nicholas, Watkins, Laura, White, Glenn, Evans, Dafydd Wyn, Wyrzykowski, Lukasz, and Wyse, Rosemary

Subjects
Theia, astrometry, astrometry, Theia
Published
2017

54. LADUMA: Looking at the Distant Universe with the MeerKAT Array

Author

Blyth, Sarah, primary, Baker, A. J., additional, Holwerda, Benne, additional, Bouchard, Antoine, additional, Catinella, Barbara, additional, Chemin, Laurent, additional, Cunnama, Daniel, additional, Davé, Romeel, additional, Faltenbacher, Andreas, additional, February, Sean, additional, Fernández, Ximena, additional, Gawiser, Eric, additional, Heywood, Ian, additional, Kereš, Dušan, additional, Klöckner, Hans-Rainer, additional, Lah, Philip, additional, Lochner, Michelle, additional, Maddox, Natasha, additional, Makhathini, Sphesihle, additional, Moodley, Kavilan, additional, Morganti, Raffaella, additional, Obreschkow, Danail, additional, Oh, Se-Heon, additional, Pisano, D.J., additional, Popping, Attila, additional, Popping, Gergö, additional, Ravindranath, Swara, additional, Schinnerer, Eva, additional, Sheth, Kartik, additional, Skelton, Rosalind, additional, Smith, Mathew, additional, Srianand, Raghunathan, additional, Staveley-Smith, Lister, additional, Vaccari, Mattia, additional, Vaisanen, Petri, additional, Walter, Fabian, additional, Rawlings, Steve, additional, Bassett, Bruce A, additional, Bershady, Matthew A, additional, Briggs, Frank H, additional, Crawford, Steven M, additional, Cress, Catherine M, additional, Darling, Jeremy K, additional, Deane, Roger P, additional, de Blok, G, additional, Elson, Ed C, additional, Frank, Bradley S, additional, Henning, Patricia A, additional, Hess, Kelley M, additional, Hughes, John P, additional, Jarvis, Matt J, additional, Kannappan, Sheila J, additional, Katz, Neal S, additional, Kraan-Korteweg, Renée C, additional, Lehnert, Matthew D, additional, Leroy, Adam K, additional, Meurer, Gerhardt R, additional, Meyer, Martin J, additional, Pisano, D J, additional, Schröder, Anja C, additional, Smirnov, Oleg M, additional, Somerville, Rachel S, additional, Stewart, Ian M, additional, van der Heyden, Kurt J, additional, Verheijen, Marc A W, additional, Wilcots, Eric M, additional, Williams, Theodore B, additional, Woudt, Patrick A, additional, Wu, John F, additional, Zwaan, Martin A, additional, Zwart, Jonathan T L, additional, Oosterloo, Tom A, additional, and van Drie, Wim, additional

Published
2018
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57. Gaia FGK benchmark stars: Abundances of α and iron-peak elements ∗,∗∗

Author

Jofré, Paula, Hourihane, Anna, Gilmore, Gerard, Adibekyan, Zh V., Bergemann, Maria, Cantat-Gaudin, Tristan, Delgado-Mena, Elisa, González Hernández, Jonay J.I., Guiglion, G., Lardo, C., De Laverny, Patrick, Heiter, Ulrike, Lind, Karin, Magrini, Laura, Mikolaitis, Šarunas S., Montes, Davíd R P D., Pancino, Elena, Recio-Blanco, Alejandra, Sordo, Rosanna, Sousa, Sérgio S.G., Tabernero, Hugo, Vallenari, Antonella, Soubiran, Caroline, Blanco-Cuaresma, S., Masseron, Thomas, Nordlander, Thomas, Chemin, Laurent, Worley, Clare C.C., Van Eck, Sophie, Jofré, Paula, Hourihane, Anna, Gilmore, Gerard, Adibekyan, Zh V., Bergemann, Maria, Cantat-Gaudin, Tristan, Delgado-Mena, Elisa, González Hernández, Jonay J.I., Guiglion, G., Lardo, C., De Laverny, Patrick, Heiter, Ulrike, Lind, Karin, Magrini, Laura, Mikolaitis, Šarunas S., Montes, Davíd R P D., Pancino, Elena, Recio-Blanco, Alejandra, Sordo, Rosanna, Sousa, Sérgio S.G., Tabernero, Hugo, Vallenari, Antonella, Soubiran, Caroline, Blanco-Cuaresma, S., Masseron, Thomas, Nordlander, Thomas, Chemin, Laurent, Worley, Clare C.C., and Van Eck, Sophie

Abstract

Context. In the current era of large spectroscopic surveys of the Milky Way, reference stars for calibrating astrophysical parameters and chemical abundances are of paramount importance. Aims. We determine elemental abundances of Mg, Si, Ca, Sc, Ti, V, Cr, Mn, Co, and Ni for our predefined set of Gaia FGK benchmark stars. Methods. By analysing high-resolution spectra with a high signal-to-noise ratio taken from several archive datasets, we combined results of eight different methods to determine abundances on a line-by-line basis. We performed a detailed homogeneous analysis of the systematic uncertainties, such as differential versus absolute abundance analysis. We also assessed errors that are due to non-local thermal equilibrium and the stellar parameters in our final abundances. Results. Our results are provided by listing final abundances and the different sources of uncertainties, as well as line-by-line and method-by-method abundances. Conclusions. The atmospheric parameters of the Gaia FGK benchmark stars are already being widely used for calibration of several pipelines that are applied to different surveys. With the added reference abundances of ten elements, this set is very suitable for calibrating the chemical abundances obtained by these pipelines., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2015

59. An Halpha study of the kinematics of NGC 3627

Author

Chemin, Laurent, Cayatte, Véronique, Balkowski, Chantal, Marcelin, M., Amram, Philippe, van Driel, Willem, Flores, Hector, Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique des Galaxies et Cosmologie, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Observatoire Astronomique de Marseille Provence (OAMP), and Université de Provence - Aix-Marseille 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience; We report here on the first observations in the Halpha-line to investigate the kinematics of the spiral galaxy NGC 3627, the brightest member of the Leo Triplet. The velocity field observed at high angular resolution shows signatures of non-circular motion. They can be attributed to dynamical perturbations due to the bar and to external interactions. In particular, we confirm the presence of an inner ring recently detected in CO observations (Regan et al. \cite{Regan3}). We find a corotation radius significantly smaller than that derived in previous studies and we show that the inner ring location is consistent with the ultra-harmonic resonance induced by the bar pattern speed. We also show that a warped tilted-ring model can be fitted to the outer parts of the southern, receding half of the disc, which is inclined by some 15 degr relative to the inner parts of the galaxy.

Published
2003
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60. Kinematics of Distant Galaxies with the Future VLT-GIRAFFE Instrument

Author

Chemin, Laurent, Cayatte, Véronique, Balkowski, Chantal, Flores, Hector, Henry, Florence, Athanassoula, E., Bosma, A., and Mujica, R.

Subjects
[PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph]
Abstract

We present a tool for the analysis of the kinematics of moderately redshifted galaxies that will be observed with the Integral Field Units mode (IFUs) of the future VLT-GIRAFFE spectrograph.

Published
2002

61. GHASP: A 3-D Survey of Spiral and Irregular Galaxies at Halpha

Author

Amram, Philippe, Adami, C., Balkowski, Chantal, Blais-Ouellette, S., Boselli, Alessandro, Boulesteix, J., Carignan, Claude, Cayatte, Véronique, Chemin, Laurent, Gach, Jean-Luc, Garrido, Olivia, Hernandez, Olivier, Marcelin, M., Michel-Dansac, Leo, Plana, Henri, Russeil, D., Vollmer, Bernd, Wozniak, Hervé, Observatoire Astronomique de Marseille Provence (OAMP), and Université de Provence - Aix-Marseille 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience; Not Available

Published
2002
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62. H I Studies of the Sculptor Group Galaxies. VIII. The Background Galaxies: NGC 24 and NGC 45

Author

Chemin, Laurent, Carignan, C, Drouin, Nathalie, Freeman, Kenneth, Chemin, Laurent, Carignan, C, Drouin, Nathalie, and Freeman, Kenneth

Abstract

In order to complete our H I survey of galaxies in the Sculptor group area, Very Large Array observations of NGC 24 and NGC 45 are presented. These two galaxies of similar magnitude, MB ∼17.4, lie in the background of the Sculptor group and are low surf

Published
2006

64. Profiling the EMBRACE tile beam using GPS satellite carriers

Author

Olofsson, Henrik A.O., primary, Torchinsky, Steve A., additional, Chemin, Laurent, additional, Barth, S., additional, Bosse, S., additional, Martin, J., additional, Paule, W., additional, Picard, Philippe, additional, Pomarede, S., additional, Renaud, P., additional, Taffoureau, C., additional, Kant, Gideon W., additional, Noordam, Jan E., additional, Wijnholds, Stefan J., additional, Keller, Reinhard, additional, and Montebugnoli, Stelio, additional

Published
2011
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74. GaiaNIR: Combining optical and Near-Infra-Red (NIR) capabilities with Time-Delay-Integration (TDI) sensors for a future Gaia-like mission

Author

Hobbs, David, Høg, Erik, Mora, Alcione, Crowley, Cian, Mcmillan, Paul, Ranalli, Piero, Heiter, Ulrike, Jordi, Carme, Hambly, Nigel, Church, Ross, Anthony, Brown, Tanga, Paolo, Chemin, Laurent, Portail, Jordi, Jiménez-Esteban, Fran, Klioner, Sergei, Mignard, Francois, Fynbo, Johan, Wyrzykowski, Łukasz, Rybicki, Krzysztof, Richard I. Anderson, Cellino, Alberto, Fabricius, Claus, Davidson, Michael, and Lindegren, Lennart

Subjects
FOS: Physical sciences, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

ESA recently called for new "Science Ideas" to be investigated in terms of feasibility and technological developments -- for technologies not yet sufficiently mature. These ideas may in the future become candidates for M or L class missions within the ESA Science Program. With the launch of Gaia in December 2013, Europe entered a new era of space astrometry following in the footsteps of the very successful Hipparcos mission from the early 1990s. Gaia is the successor to Hipparcos, both of which operated in optical wavelengths, and Gaia is two orders of magnitude more accurate in the five astrometric parameters and is surveying four orders of magnitude more stars in a vast volume of the Milky Way. The combination of the Hipparcos/Tycho-2 catalogues with the first early Gaia data release will give improved proper motions over a long ~25 year baseline. The final Gaia solution will also establish a new optical reference frame by means of quasars, by linking the optical counterparts of radio (VLBI) sources defining the orientation of the reference frame, and by using the zero proper motion of quasars to determine a non-rotating frame. A weakness of Gaia is that it only operates at optical wavelengths. However, much of the Galactic centre and the spiral arm regions, important for certain studies, are obscured by interstellar extinction and this makes it difficult for Gaia to deeply probe. Traditionally, this problem is overcome by switching to the infra-red but this was not possible with Gaia's CCDs. Additionally, to scan the entire sky and make global absolute parallax measurements the spacecraft must have a constant rotation and this requires that the CCDs operate in TDI mode, increasing their complexity., 27 Pages

75. Solar twins in the ELODIE archive

Author

Mahdi, D., Soubiran, C., Blanco-Cuaresma, S., Chemin, L., Chemin, Laurent, Blanco-Cuaresma, Sergi, Soubiran, Caroline, Mahdi, Dhiaa, M2A 2016, Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Observatoire Astronomique de l'Université de Genève (ObsGE), and Université de Genève (UNIGE)

Subjects
Absolute magnitude, Physics, media_common.quotation_subject, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, 01 natural sciences, Astronomical spectroscopy, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Sky, Asteroid, 0103 physical sciences, Physics::Space Physics, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, 010306 general physics, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), media_common, Differential method
Abstract

A large dataset of ~2800 spectra extracted from the ELODIE archive was analysed in order to find solar twins. A list of stellar spectra closely resembling the spectrum of the Sun was selected by applying a purely differential method, directly on the fluxes. As solar reference, 18 spectra of asteroids, Moon and blue sky were used. Atmospheric parameters and differential abundances of 8 chemical elements were determined for the solar twin candidates, after a careful selection of appropriate lines. The Li feature of the targets was investigated and additional information on absolute magnitude and age was gathered from the literature. HIP076114 (HD138573) is our best twin candidate, looking exactly like the Sun in all these properties., Accepted for publication in Astronomy & Astrophysics, 15 pages, 5 figures. All tables will be available on VizieR at CDS

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76. Theia: Faint objects in motion or the new astrometry frontier

Author

Boehm, Céline, Krone-Martins, Alberto, Amorim, António, Anglada-Escudé, Guillem, Brandeker, Alexis, Courbin, Frederic, Enßlin, Torsten, Falcão, António, Freese, Katherine, Holl, Berry, Labadie, Lucas, Leger, Alain, Malbet, Fabien, Mamon, Gary, Mcarthur, Barbara, Mora, Alcione, Shao, Michael, Sozzetti, Alessandro, Spolyar, Douglas, Villaver, Eva, Albertus, Conrado, Bertone, Stefano, Bouy, Hervé, Boylan-Kolchin, Michael, Brown, Anthony, Brown, Warren, Cardoso, Vitor, Chemin, Laurent, Claudi, Riccardo, Correia, Alexandre C. M., Crosta, Mariateresa, Crouzier, Antoine, Cyr-Racine, Francis-Yan, Damasso, Mario, Da Silva, António, Davies, Melvyn, Das, Payel, Dayal, Pratika, Val-Borro, Miguel, Diaferio, Antonaldo, Erickcek, Adrienne, Fairbairn, Malcolm, Fortin, Morgane, Fridlund, Malcolm, Garcia, Paulo, Gnedin, Oleg, Goobar, Ariel, Gordo, Paulo, Goullioud, Renaud, Hambly, Nigel, Hara, Nathan, Hobbs, David, Hog, Erik, Holland, Andrew, Ibata, Rodrigo, Jordi, Carme, Klioner, Sergei, Kopeikin, Sergei, Lacroix, Thomas, Laskar, Jacques, Le Poncin-Lafitte, Christophe, Luri, Xavier, Majumdar, Subhabrata, Makarov, Valeri, Massey, Richard, Mennesson, Bertrand, Michalik, Daniel, Almeida, André Moitinho, Mourão, Ana, Moustakas, Leonidas, Murray, Neil, Muterspaugh, Matthew, Oertel, Micaela, Ostorero, Luisa, Perez-Garcia, Angeles, Platais, Imants, I Portell I Mora, Jord, Quirrenbach, Andreas, Randall, Lisa, Read, Justin, Regos, Eniko, Rory, Barnes, Rybicki, Krzysztof, Scott, Pat, Schneider, Jean, Jakub Scholtz, Siebert, Arnaud, Tereno, Ismael, Tomsick, John, Traub, Wesley, Valluri, Monica, Walker, Matt, Walton, Nicholas, Watkins, Laura, White, Glenn, Evans, Dafydd Wyn, Wyrzykowski, Lukasz, Wyse, Rosemary, Abbas, Ummi, Alimi, Jean-Michel, Altmann, Martin, Alves, João, Anderson, Richard, Arenou, Frédéric, Bailer-Jones, Coryn, Carlton, Baugh, Biermann, Michael, Blanco-Cuaresma, Sergi, Bonomo, Aldo Stefano, Broderick, Avery, Busso, Giorgia, Cabrera, Juan, Carrasco, Josep Manel, Carvalho, Carla Sofia, Castellani, Marco, Cermeño-Gavilán, Marina, Chadwick, Paula, Darling, Jeremy, Davidson, Michael, Angeli, Francesca, Carvalho, Reinaldo, Desidera, Silvano, Done, Chris, Ducourant, Christine, Erkal, Denis, Eyer, Laurent, Famey, Benoit, Feltzing, Sofia, Garcia, Emilio Fraile, Gomez, Facundo Ariel, Frenk, Carlos, Gai, Mario, Galli, Phillip, Galluccio, Laurent, Gavras, Panagiotis, Giacobbe, Paolo, Gratton, Raffaele, Guglielmetti, Fabrizia, Gunther, Eike, Hall, David, Harrison, Diana, Hatzes, Artie, Hestroffer, Daniel, Ishida, Emille, Jablonka, Pascale, Jacobs, Christopher, Janson, Markus, Jasche, Jens, Jauzac, Mathilde, Jones, Hugh, Jonker, Peter, Julbe, Francesc, Kneib, Jean-Paul, Kordopatis, Georges, Lancon, Arianne, Lattanzi, Mario Gilberto, Leguidou, Jean-Michel, Lehnert, Matt, Lehto, Harry, Lopes, Ilidio, Maldonado, Jesus, Marconi, Marcella, Martin, Nicolas, Marie-Elisabeth, Maury, Mazumdar, Anupam, Michtchenko, Tatiana, Minardi, Stefano, Munoz, Carlos, Murante, Giuseppe, Musella, Ilaria, Gerhard, Ortwin, Pagano, Isabella, Pani, Paolo, Paetzold, Martin, Daniel, Pfenniger, Piotto, Giampaolo, Preis, Olivier, Produit, Nicolas, Prost, Jean-Pierre, Rauer, Heike, Raymond, Sean, Reinaldo, Rosa, Revaz, Yves, Rita, Ribeiro, Rimoldini, Lorenzo, Huguet, Arnau Rios, Ripepi, Vincenzo, Rocci, Pier-Francesco, Rodriguez Frias, Maria D., Rosa, Reinaldo R., Sahlmann, Johannes, Saltas, Ippocratis, E E Lemos, José Pizarro Sand, Sarro, Luis M., Schaefer, Bjoern Malte, Schewtschenko, Jascha, Segransan, Damien, Selsis, Franck, Silk, Joe, Silva, Manuel, Solitro, Filomena, Spagna, Alessandro, Springel, Volker, Süveges, Maria, Teixeira, Ramachrisna, Shindou, Tetsuo, Thebault, Philippe, Tian, Feng, Turon, Catherine, Valle, José W. F., Vasiliev, Eugene, Vladilo, Juan, Martin, Vollmann, Ward, Martin, Weller, Jochen, Wilkinson, Mark, Wolf, Sebastian, Xiaoting, Fu, Yamada, Yoshiyuki, Zschocke, Sven, Zucker, Shay, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Université Grenoble Alpes (UGA), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Observatoire de Paris - Site de Paris (OP), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA), Observatoire de Paris - Site de Meudon (OBSPM), Observatoire de Paris, Laboratoire Univers et Théories (LUTH (UMR_8102)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Galaxies, Etoiles, Physique, Instrumentation (GEPI), Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Observatoire de la Côte d'Azur (OCA), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Blaise Pascal - Clermont-Ferrand 2 (UBP), Centre National d’Études Spatiales [Paris] (CNES), Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Theia, Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS), PSL Research University (PSL)-PSL Research University (PSL)-Université de Lille-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), PSL Research University (PSL)-PSL Research University (PSL)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Observatoire de Paris, Centre National de la Recherche Scientifique (CNRS), Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), and HEP, INSPIRE

Subjects
[PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Physics::Space Physics, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astrophysics::Earth and Planetary Astrophysics, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Astrophysics::Galaxy Astrophysics
Abstract

In the context of the ESA M5 (medium mission) call we proposed a new satellite mission, Theia, based on relative astrometry and extreme precision to study the motion of very faint objects in the Universe. Theia is primarily designed to study the local dark matter properties, the existence of Earth-like exoplanets in our nearest star systems and the physics of compact objects. Furthermore, about 15 $\%$ of the mission time was dedicated to an open observatory for the wider community to propose complementary science cases. With its unique metrology system and "point and stare" strategy, Theia's precision would have reached the sub micro-arcsecond level. This is about 1000 times better than ESA/Gaia's accuracy for the brightest objects and represents a factor 10-30 improvement for the faintest stars (depending on the exact observational program). In the version submitted to ESA, we proposed an optical (350-1000nm) on-axis TMA telescope. Due to ESA Technology readiness level, the camera's focal plane would have been made of CCD detectors but we anticipated an upgrade with CMOS detectors. Photometric measurements would have been performed during slew time and stabilisation phases needed for reaching the required astrometric precision., Comment: http://theia.phyip3.dur.ac.uk

77. Faint objects in motion: the new frontier of high precision astrometry

Author

Malbet, Fabien, Boehm, Céline, Krone-Martins, Alberto, Amorim, Antonio, Anglada-Escudé, Guillem, Brandeker, Alexis, Courbin, Frédéric, Enßlin, Torsten, Falcão, Antonio, Freese, Katherine, Holl, Berry, Labadie, Lucas, Léger, Alain, Mamon, Gary A., McArthur, Barbara, Mora, Alcione, Shao, Mike, Sozzetti, Alessandro, Spolyar, Douglas, Villaver, Eva, Abbas, Ummi, Albertus, Conrado, Alves, João, Barnes, Rory, Bonomo, Aldo Stefano, Bouy, Hervé, Brown, Warren R., Cardoso, Vitor, Castellani, Marco, Chemin, Laurent, Clark, Hamish, Correia, Alexandre C. M., Crosta, Mariateresa, Crouzier, Antoine, Damasso, Mario, Darling, Jeremy, Davies, Melvyn B., Diaferio, Antonaldo, Fortin, Morgane, Fridlund, Malcolm, Gai, Mario, Garcia, Paulo, Gnedin, Oleg, Goobar, Ariel, Gordo, Paulo, Goullioud, Renaud, Hall, David, Hambly, Nigel, Harrison, Diana, Hobbs, David, Holland, Andrew, Høg, Erik, Jordi, Carme, Klioner, Sergei, Lançon, Ariane, Laskar, Jacques, Lattanzi, Mario, Le Poncin-Lafitte, Christophe, Luri, Xavier, Michalik, Daniel, de Almeida, André Moitinho, Mourão, Ana, Moustakas, Leonidas, Murray, Neil J., Muterspaugh, Matthew, Oertel, Micaela, Ostorero, Luisa, Portell, Jordi, Prost, Jean-Pierre, Quirrenbach, Andreas, Schneider, Jean, Scott, Pat, Siebert, Arnaud, Silva, Antonio da, Silva, Manuel, Thébault, Philippe, Tomsick, John, Traub, Wesley, de Val-Borro, Miguel, Valluri, Monica, Walton, Nicholas A., Watkins, Laura L., White, Glenn, Wyrzykowski, Lukasz, Wyse, Rosemary, Yamada, Yoshiyuki, Malbet, Fabien, Boehm, Céline, Krone-Martins, Alberto, Amorim, Antonio, Anglada-Escudé, Guillem, Brandeker, Alexis, Courbin, Frédéric, Enßlin, Torsten, Falcão, Antonio, Freese, Katherine, Holl, Berry, Labadie, Lucas, Léger, Alain, Mamon, Gary A., McArthur, Barbara, Mora, Alcione, Shao, Mike, Sozzetti, Alessandro, Spolyar, Douglas, Villaver, Eva, Abbas, Ummi, Albertus, Conrado, Alves, João, Barnes, Rory, Bonomo, Aldo Stefano, Bouy, Hervé, Brown, Warren R., Cardoso, Vitor, Castellani, Marco, Chemin, Laurent, Clark, Hamish, Correia, Alexandre C. M., Crosta, Mariateresa, Crouzier, Antoine, Damasso, Mario, Darling, Jeremy, Davies, Melvyn B., Diaferio, Antonaldo, Fortin, Morgane, Fridlund, Malcolm, Gai, Mario, Garcia, Paulo, Gnedin, Oleg, Goobar, Ariel, Gordo, Paulo, Goullioud, Renaud, Hall, David, Hambly, Nigel, Harrison, Diana, Hobbs, David, Holland, Andrew, Høg, Erik, Jordi, Carme, Klioner, Sergei, Lançon, Ariane, Laskar, Jacques, Lattanzi, Mario, Le Poncin-Lafitte, Christophe, Luri, Xavier, Michalik, Daniel, de Almeida, André Moitinho, Mourão, Ana, Moustakas, Leonidas, Murray, Neil J., Muterspaugh, Matthew, Oertel, Micaela, Ostorero, Luisa, Portell, Jordi, Prost, Jean-Pierre, Quirrenbach, Andreas, Schneider, Jean, Scott, Pat, Siebert, Arnaud, Silva, Antonio da, Silva, Manuel, Thébault, Philippe, Tomsick, John, Traub, Wesley, de Val-Borro, Miguel, Valluri, Monica, Walton, Nicholas A., Watkins, Laura L., White, Glenn, Wyrzykowski, Lukasz, Wyse, Rosemary, and Yamada, Yoshiyuki

Abstract

Sky survey telescopes and powerful targeted telescopes play complementary roles in astronomy. In order to investigate the nature and characteristics of the motions of very faint objects, a flexibly-pointed instrument capable of high astrometric accuracy is an ideal complement to current astrometric surveys and a unique tool for precision astrophysics. Such a space-based mission will push the frontier of precision astrometry from evidence of Earth-mass habitable worlds around the nearest stars, to distant Milky Way objects, and out to the Local Group of galaxies. As we enter the era of the James Webb Space Telescope and the new ground-based, adaptive-optics-enabled giant telescopes, by obtaining these high precision measurements on key objects that Gaia could not reach, a mission that focuses on high precision astrometry science can consolidate our theoretical understanding of the local Universe, enable extrapolation of physical processes to remote redshifts, and derive a much more consistent picture of cosmological evolution and the likely fate of our cosmos. Already several missions have been proposed to address the science case of faint objects in motion using high precision astrometry missions: NEAT proposed for the ESA M3 opportunity, micro-NEAT for the S1 opportunity, and Theia for the M4 and M5 opportunities. Additional new mission configurations adapted with technological innovations could be envisioned to pursue accurate measurements of these extremely small motions. The goal of this White Paper is to address the fundamental science questions that are at stake when we focus on the motions of faint sky objects and to briefly review instrumentation and mission profiles.

78. Faint objects in motion: the new frontier of high precision astrometry

Author

Malbet, Fabien, Boehm, Céline, Krone-Martins, Alberto, Amorim, Antonio, Anglada-Escudé, Guillem, Brandeker, Alexis, Courbin, Frédéric, Enßlin, Torsten, Falcão, Antonio, Freese, Katherine, Holl, Berry, Labadie, Lucas, Léger, Alain, Mamon, Gary A., McArthur, Barbara, Mora, Alcione, Shao, Mike, Sozzetti, Alessandro, Spolyar, Douglas, Villaver, Eva, Abbas, Ummi, Albertus, Conrado, Alves, João, Barnes, Rory, Bonomo, Aldo Stefano, Bouy, Hervé, Brown, Warren R., Cardoso, Vitor, Castellani, Marco, Chemin, Laurent, Clark, Hamish, Correia, Alexandre C. M., Crosta, Mariateresa, Crouzier, Antoine, Damasso, Mario, Darling, Jeremy, Davies, Melvyn B., Diaferio, Antonaldo, Fortin, Morgane, Fridlund, Malcolm, Gai, Mario, Garcia, Paulo, Gnedin, Oleg, Goobar, Ariel, Gordo, Paulo, Goullioud, Renaud, Hall, David, Hambly, Nigel, Harrison, Diana, Hobbs, David, Holland, Andrew, Høg, Erik, Jordi, Carme, Klioner, Sergei, Lançon, Ariane, Laskar, Jacques, Lattanzi, Mario, Le Poncin-Lafitte, Christophe, Luri, Xavier, Michalik, Daniel, de Almeida, André Moitinho, Mourão, Ana, Moustakas, Leonidas, Murray, Neil J., Muterspaugh, Matthew, Oertel, Micaela, Ostorero, Luisa, Portell, Jordi, Prost, Jean-Pierre, Quirrenbach, Andreas, Schneider, Jean, Scott, Pat, Siebert, Arnaud, Silva, Antonio da, Silva, Manuel, Thébault, Philippe, Tomsick, John, Traub, Wesley, de Val-Borro, Miguel, Valluri, Monica, Walton, Nicholas A., Watkins, Laura L., White, Glenn, Wyrzykowski, Lukasz, Wyse, Rosemary, Yamada, Yoshiyuki, Malbet, Fabien, Boehm, Céline, Krone-Martins, Alberto, Amorim, Antonio, Anglada-Escudé, Guillem, Brandeker, Alexis, Courbin, Frédéric, Enßlin, Torsten, Falcão, Antonio, Freese, Katherine, Holl, Berry, Labadie, Lucas, Léger, Alain, Mamon, Gary A., McArthur, Barbara, Mora, Alcione, Shao, Mike, Sozzetti, Alessandro, Spolyar, Douglas, Villaver, Eva, Abbas, Ummi, Albertus, Conrado, Alves, João, Barnes, Rory, Bonomo, Aldo Stefano, Bouy, Hervé, Brown, Warren R., Cardoso, Vitor, Castellani, Marco, Chemin, Laurent, Clark, Hamish, Correia, Alexandre C. M., Crosta, Mariateresa, Crouzier, Antoine, Damasso, Mario, Darling, Jeremy, Davies, Melvyn B., Diaferio, Antonaldo, Fortin, Morgane, Fridlund, Malcolm, Gai, Mario, Garcia, Paulo, Gnedin, Oleg, Goobar, Ariel, Gordo, Paulo, Goullioud, Renaud, Hall, David, Hambly, Nigel, Harrison, Diana, Hobbs, David, Holland, Andrew, Høg, Erik, Jordi, Carme, Klioner, Sergei, Lançon, Ariane, Laskar, Jacques, Lattanzi, Mario, Le Poncin-Lafitte, Christophe, Luri, Xavier, Michalik, Daniel, de Almeida, André Moitinho, Mourão, Ana, Moustakas, Leonidas, Murray, Neil J., Muterspaugh, Matthew, Oertel, Micaela, Ostorero, Luisa, Portell, Jordi, Prost, Jean-Pierre, Quirrenbach, Andreas, Schneider, Jean, Scott, Pat, Siebert, Arnaud, Silva, Antonio da, Silva, Manuel, Thébault, Philippe, Tomsick, John, Traub, Wesley, de Val-Borro, Miguel, Valluri, Monica, Walton, Nicholas A., Watkins, Laura L., White, Glenn, Wyrzykowski, Lukasz, Wyse, Rosemary, and Yamada, Yoshiyuki

Abstract

Sky survey telescopes and powerful targeted telescopes play complementary roles in astronomy. In order to investigate the nature and characteristics of the motions of very faint objects, a flexibly-pointed instrument capable of high astrometric accuracy is an ideal complement to current astrometric surveys and a unique tool for precision astrophysics. Such a space-based mission will push the frontier of precision astrometry from evidence of Earth-mass habitable worlds around the nearest stars, to distant Milky Way objects, and out to the Local Group of galaxies. As we enter the era of the James Webb Space Telescope and the new ground-based, adaptive-optics-enabled giant telescopes, by obtaining these high precision measurements on key objects that Gaia could not reach, a mission that focuses on high precision astrometry science can consolidate our theoretical understanding of the local Universe, enable extrapolation of physical processes to remote redshifts, and derive a much more consistent picture of cosmological evolution and the likely fate of our cosmos. Already several missions have been proposed to address the science case of faint objects in motion using high precision astrometry missions: NEAT proposed for the ESA M3 opportunity, micro-NEAT for the S1 opportunity, and Theia for the M4 and M5 opportunities. Additional new mission configurations adapted with technological innovations could be envisioned to pursue accurate measurements of these extremely small motions. The goal of this White Paper is to address the fundamental science questions that are at stake when we focus on the motions of faint sky objects and to briefly review instrumentation and mission profiles.

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