All Outputs (122)

Is the Milky Way still breathing? RAVE–Gaia streaming motions (2018)
Journal Article
Carrillo, I., Minchev, I., Kordopatis, G., Steinmetz, M., Binney, J., Anders, F., Bienaymé, O., Bland-Hawthorn, J., Famaey, B., Freeman, K. C., Gilmore, G., Gibson, B. K., Grebel, E. K., Helmi, A., Just, A., Kunder, A., McMillan, P., Monari, G., Munari, U., Navarro, J., …Zwitter, T. (2018). Is the Milky Way still breathing? RAVE–Gaia streaming motions. Monthly notices of the Royal Astronomical Society, 475(2), 2679-2696. https://doi.org/10.1093/mnras/stx3342

We use data from the Radial Velocity Experiment (RAVE) and the Tycho-Gaia astrometric solution (TGAS) catalogue to compute the velocity fields yielded by the radial (VR), azimuthal (Vϕ),and vertical (Vz) components of associated Galactocentric veloci... Read More about Is the Milky Way still breathing? RAVE–Gaia streaming motions.

The Foundation Supernova Survey: Motivation, design, implementation, and first data release (2017)
Journal Article
Foley, R. J., Scolnic, D., Rest, A., Jha, S. W., Pan, Y.-C., Riess, A. G., Challis, P., Chambers, K. C., Coulter, D. A., Dettman, K. G., Foley, M. M., Fox, O. D., Huber, M. E., Jones, D. O., Kilpatrick, C. D., Kirshner, R. P., Schultz, A. S. B., Siebert, M. R., Flewelling, H. A., Gibson, B., …Willman, M. (2018). The Foundation Supernova Survey: Motivation, design, implementation, and first data release. Monthly notices of the Royal Astronomical Society, 475(1), 193-219. https://doi.org/10.1093/mnras/stx3136

© 2017 The Author(s). The Foundation Supernova Survey aims to provide a large, high-fidelity, homogeneous, and precisely calibrated low-redshift Type Ia supernova (SN Ia) sample for cosmology. The calibration of the current low-redshift SN sample is... Read More about The Foundation Supernova Survey: Motivation, design, implementation, and first data release.

The role of stellar radial motions in shaping galaxy surface brightness profiles (2017)
Journal Article
Ruiz-Lara, T., Few, C. G., Florido, E., Gibson, B. K., Pérez, I., & Sánchez-Blázquez, P. (2017). The role of stellar radial motions in shaping galaxy surface brightness profiles. Astronomy and Astrophysics, 608, A126. https://doi.org/10.1051/0004-6361/201731485

Aims. The physics driving features such as breaks observed in galaxy surface brightness (SB) profiles remains contentious. Here, we assess the importance of stellar radial motions in shaping their characteristics. Methods. We use the simulated Milky... Read More about The role of stellar radial motions in shaping galaxy surface brightness profiles.

Metallicity gradient of the thick disc progenitor at high redshift (2017)
Journal Article
Kawata, D., Prieto, C. A., Brook, C. B., Casagrande, L., Ciucă, I., Gibson, B. K., Grand, R. J. J., Hayden, M. R., & Hunt, J. A. S. (2018). Metallicity gradient of the thick disc progenitor at high redshift. Monthly notices of the Royal Astronomical Society, 473(1), 867-878. https://doi.org/10.1093/mnras/stx2464

© 2017 The Authors. We have developed a novel Markov Chain Monte Carlo chemical 'painting' technique to explore possible radial and vertical metallicity gradients for the thick disc progenitor. In our analysis, we match an N-body simulation to the da... Read More about Metallicity gradient of the thick disc progenitor at high redshift.

The Gaia-ESO Survey: matching chemodynamical simulations to observations of the Milky Way (2017)
Journal Article
Thompson, B. B., Few, C. G., Bergemann, M., Gibson, B. K., MacFarlane, B. A., Serenelli, A., Gilmore, G., Randich, S., Vallenari, A., Alfaro, E. J., Bensby, T., Francois, P., Korn, A. J., Bayo, A., Carraro, G., Casey, A. R., Costado, M. T., Donati, P., Franciosini, E., Frasca, A., …Zaggia, S. (2018). The Gaia-ESO Survey: matching chemodynamical simulations to observations of the Milky Way. Monthly notices of the Royal Astronomical Society, 473(1), 185-197. https://doi.org/10.1093/MNRAS/STX2316

The typical methodology for comparing simulated galaxies with observational surveys is usually to apply a spatial selection to the simulation to mimic the region of interest covered by a comparable observational survey sample. In this work, we compar... Read More about The Gaia-ESO Survey: matching chemodynamical simulations to observations of the Milky Way.

Galactic chemical evolution (2017)
Book Chapter
Mollá, M., Cavichia, O., Costa, R. D. D. D., Gibson, B. K., & Díaz, Á. I. (in press). Galactic chemical evolution. In Highlights of Spanish astrophysics IX. Sociedad Española de Astronomía

We analyze the evolution of oxygen abundance radial gradients resulting from our chemical evolution models calculated with different prescriptions for the star formation rate (SFR) and for the gas infall rate, in order to assess their respective role... Read More about Galactic chemical evolution.

Climbing the cosmic ladder with stellar twins in RAVE with Gaia (2017)
Journal Article
Jofré, P., Traven, G., Hawkins, K., Gilmore, G., Sanders, J. L., Mädler, T., Steinmetz, M., Kunder, A., Kordopatis, G., McMillan, P., Bienaymé, O., Bland-Hawthorn, J., Gibson, B. K., Grebel, E. K., Munari, U., Navarro, J., Parker, Q., Reid, W., Seabroke, G., & Zwitter, T. (2017). Climbing the cosmic ladder with stellar twins in RAVE with Gaia. Monthly notices of the Royal Astronomical Society, 472(3), 2517-2533. https://doi.org/10.1093/mnras/stx1877

© 2017 The Author. We apply the twin method to determine parallaxes to 232 545 stars of the RAVE survey using the parallaxes of Gaia DR1 as a reference. To search for twins in this large data set, we apply the t-student stochastic neighbour embedding... Read More about Climbing the cosmic ladder with stellar twins in RAVE with Gaia.

Very metal-poor stars observed by the RAVE survey (2017)
Journal Article
Matijevič, G., Chiappini, C., Grebel, E. K., Wyse, R. F. G., Zwitter, T., Bienaymé, O., Bland-Hawthorn, J., Freeman, K. C., Gibson, B. K., Gilmore, G., Helmi, A., Kordopatis, G., Kunder, A., Munari, U., Navarro, J. F., Parker, Q. A., Reid, W., Seabroke, G., Siviero, A., Steinmetz, M., & Watson, F. (2017). Very metal-poor stars observed by the RAVE survey. Astronomy and Astrophysics, 603, A19. https://doi.org/10.1051/0004-6361/201730417

© ESO, 2017. Metal-poor stars trace the earliest phases in the chemical enrichment of the Universe. They give clues about the early assembly of the Galaxy as well as on the nature of the first stellar generations. Multi-object spectroscopic surveys p... Read More about Very metal-poor stars observed by the RAVE survey.

PLATO as it is: A legacy mission for Galactic archaeology (2017)
Journal Article
Miglio, A., Chiappini, C., Mosser, B., Davies, G. R., Freeman, K., Girardi, L., Jofré, P., Kawata, D., Rendle, B. M., Valentini, M., Casagrande, L., Chaplin, W. J., Gilmore, G., Hawkins, K., Holl, B., Appourchaux, T., Belkacem, K., Bossini, D., Brogaard, K., Goupil, M.-J., …Worley, C. C. (2017). PLATO as it is: A legacy mission for Galactic archaeology. Astronomische Nachrichten, 338(6), 644-661. https://doi.org/10.1002/asna.201713385

Deciphering the assembly history of the Milky Way is a formidable task, which becomes possible only if one can produce high-resolution chrono-chemo-kinematical maps of the Galaxy. Data from large-scale astrometric and spectroscopic surveys will soon... Read More about PLATO as it is: A legacy mission for Galactic archaeology.

Observing the metal-poor solar neighbourhood: A comparison of galactic chemical evolution predictions (2017)
Journal Article
Mishenina, T., Pignatari, M., Côté, B., Thielemann, F.-K., Soubiran, C., Basak, N., Gorbaneva, T., Korotin, S. A., Kovtyukh, V. V., Wehmeyer, B., Bisterzo, S., Travaglio, C., Gibson, B. K., Jordan, C., Paul, A., Ritter, C., & Herwig, F. (2017). Observing the metal-poor solar neighbourhood: A comparison of galactic chemical evolution predictions. Monthly notices of the Royal Astronomical Society. Letters, 469(4), 4378-4399. https://doi.org/10.1093/mnras/stx1145

© 2017 The Authors. Atmospheric parameters and chemical compositions for 10 stars with metallicities in the region of -2.2 < [Fe/H] < -0.6 were precisely determined using high-resolution, high signal-tonoise, spectra. For each star, the abundance... Read More about Observing the metal-poor solar neighbourhood: A comparison of galactic chemical evolution predictions.

The RAVE-on Catalog of Stellar Atmospheric Parameters and Chemical Abundances for Chemo-dynamic Studies in the Gaia Era (2017)
Journal Article
Casey, A. R., Hawkins, K., Hogg, D. W., Ness, M., Rix, H. W., Kordopatis, G., Kunder, A., Steinmetz, M., Koposov, S., Enke, H., Sanders, J., Gilmore, G., Zwitter, T., Freeman, K. C., Casagrande, L., Matijevič, G., Seabroke, G., Bienaymé, O., Bland-Hawthorn, J., Gibson, B. K., …Wyse, R. (2017). The RAVE-on Catalog of Stellar Atmospheric Parameters and Chemical Abundances for Chemo-dynamic Studies in the Gaia Era. The Astrophysical journal, 840(1), 59. https://doi.org/10.3847/1538-4357/aa69c2

The orbits, atmospheric parameters, chemical abundances, and ages of individual stars in the Milky Way provide the most comprehensive illustration of galaxy formation available. The Tycho-Gaia Astrometric Solution (TGAS) will deliver astrometric para... Read More about The RAVE-on Catalog of Stellar Atmospheric Parameters and Chemical Abundances for Chemo-dynamic Studies in the Gaia Era.

Asymmetric metallicity patterns in the stellar velocity space with RAVE (2017)
Journal Article
Antoja, T., Kordopatis, G., Helmi, A., Monari, G., Famaey, B., Wyse, R. F. G., Grebel, E. K., Steinmetz, M., Bland-Hawthorn, J., Gibson, B. K., Bienaymé, O., Navarro, J. F., Parker, Q. A., Reid, W., Seabroke, G., Siebert, A., Siviero, A., & Zwitter, T. (2017). Asymmetric metallicity patterns in the stellar velocity space with RAVE. Astronomy and Astrophysics, 601, A59. https://doi.org/10.1051/0004-6361/201629387

© ESO, 2017. Context. The chemical abundances of stars encode information on their place and time of origin. Stars formed together in e.g. a cluster, should present chemical homogeneity. Also disk stars influenced by the effects of the bar and the sp... Read More about Asymmetric metallicity patterns in the stellar velocity space with RAVE.

A RAVE investigation on Galactic open clusters: II. Open cluster pairs, groups and complexes (2017)
Journal Article
Conrad, C., Scholz, R.-D., Kharchenko, N. V., Piskunov, A. E., Röser, S., Schilbach, E., De Jong, R. S., Schnurr, O., Steinmetz, M., Grebel, E. K., Zwitter, T., Bienaymé, O., Bland-Hawthorn, J., Gibson, B. K., Gilmore, G., Kordopatis, G., Kunder, A., Navarro, J. F., Parker, Q., Reid, W., …Wyse, R. (2017). A RAVE investigation on Galactic open clusters: II. Open cluster pairs, groups and complexes. Astronomy and Astrophysics, 600, A106. https://doi.org/10.1051/0004-6361/201630012

© ESO, 2017. Context. It is generally agreed upon that stars form in open clusters (OCs) and stellar associations, but little is known about structures in the Galactic OC population; whether OCs and stellar associations are born isolated or if they p... Read More about A RAVE investigation on Galactic open clusters: II. Open cluster pairs, groups and complexes.

RAVE stars in K2: I. Improving RAVE red giants spectroscopy using asteroseismology from K2 Campaign 1 (2017)
Journal Article
Valentini, M., Chiappini, C., Davies, G. R., Elsworth, Y. P., Mosser, B., Lund, M. N., Miglio, A., Chaplin, W. J., Rodrigues, T. S., Boeche, C., Steinmetz, M., Matijevič, G., Kordopatis, G., Bland-Hawthorn, J., Munari, U., Bienaymé, O., Freeman, K. C., Gibson, B. K., Gilmore, G., Grebel, E. K., …Mott, A. (2017). RAVE stars in K2: I. Improving RAVE red giants spectroscopy using asteroseismology from K2 Campaign 1. Astronomy and Astrophysics, 600, A66. https://doi.org/10.1051/0004-6361/201629701

© 2017 ESO. We present a set of 87 RAVE stars with detected solar like oscillations, observed during Campaign 1 of the K2 mission (RAVE K2-C1 sample). This data set provides a useful benchmark for testing the gravities provided in RAVE data release 4... Read More about RAVE stars in K2: I. Improving RAVE red giants spectroscopy using asteroseismology from K2 Campaign 1.

The selection function of the RAVE survey (2017)
Journal Article
Wojno, J., Kordopatis, G., Piffl, T., Binney, J., Steinmetz, M., Matijevič, G., Bland-Hawthorn, J., Sharma, S., McMillan, P., Watson, F., Reid, W., Kunder, A., Enke, H., Grebel, E. K., Seabroke, G., Wyse, R. F. G., Zwitter, T., Bienaymé, O., Freeman, K. C., Gibson, B. K., …Siebert, A. (2017). The selection function of the RAVE survey. Monthly notices of the Royal Astronomical Society, 468(3), 3368-3380. https://doi.org/10.1093/mnras/stx606

We characterize the selection function of RAdial Velocity Experiment (RAVE) using 2 Micron All Sky Survey (2MASS) as our underlying population, which we assume represents all stars that could have potentially been observed.We evaluate the completenes... Read More about The selection function of the RAVE survey.

Galaxy chemical evolution models: The role of molecular gas formation (2017)
Journal Article
Mollá, M., Díaz, Á. I., Ascasibar, Y., & Gibson, B. K. (2017). Galaxy chemical evolution models: The role of molecular gas formation. Monthly notices of the Royal Astronomical Society, 468(1), 305-318. https://doi.org/10.1093/mnras/stx419

In our classical grid of multiphase chemical evolution models, star formation in the disc occurs in two steps: first, molecular gas forms, and then stars are created by cloud-cloud collisions or interactions of massive stars with the surrounding mole... Read More about Galaxy chemical evolution models: The role of molecular gas formation.

Chromospherically Active Stars in the RAVE Survey. II. Young dwarfs in the Solar neighborhood (2017)
Journal Article
Žerjal, M., Zwitter, T., Matijevič, G., Grebel, E. K., Kordopatis, G., Munari, U., Seabroke, G., Steinmetz, M., Wojno, J., Bienaymé, O., Bland-Hawthorn, J., Conrad, C., Freeman, K. C., Gibson, B. K., Gilmore, G., Kunder, A., Navarro, J., Parker, Q. A., Reid, W., Siviero, A., …Wyse, R. F. G. (2017). Chromospherically Active Stars in the RAVE Survey. II. Young dwarfs in the Solar neighborhood. The Astrophysical journal, 835(1), 61. https://doi.org/10.3847/1538-4357/835/1/61

A large sample of over 38,000 chromospherically active candidate solar-like stars and cooler dwarfs from the RAVE survey is addressed in this paper. An improved activity identification with respect to the previous study was introduced to build a cata... Read More about Chromospherically Active Stars in the RAVE Survey. II. Young dwarfs in the Solar neighborhood.

The Radial Velocity Experiment (RAVE): fifth data release (2017)
Journal Article
Kunder, A., Kordopatis, G., Steinmetz, M., Zwitter, T., McMillan, P. J., Casagrande, L., Enke, H., Wojno, J., Valentini, M., Chiappini, C., Matijevič, G., Siviero, A., De Laverny, P., Recio-Blanco, A., Bijaoui, A., Wyse, R. F. G., Binney, J., Grebel, E. K., Helmi, A., Jofre, P., …Mosser, B. (2017). The Radial Velocity Experiment (RAVE): fifth data release. Astronomical Journal, 153(2), 75. https://doi.org/10.3847/1538-3881/153/2/75

Data Release 5 (DR5) of the Radial Velocity Experiment (RAVE) is the fifth data release from a magnitude-limited (9 < I < 12) survey of stars randomly selected in the Southern Hemisphere. The RAVE medium-resolution spectra (R ∼ 7500) covering the Ca-... Read More about The Radial Velocity Experiment (RAVE): fifth data release.

The evolution of the radial gradient of oxygen abundance in spiral galaxies (2016)
Preprint / Working Paper
Mollá, M., Díaz, Á., Ascasibar, Y., Gibson, B., Cavichia, O., Costa, R. D. D. D., & Maciel, W. J. The evolution of the radial gradient of oxygen abundance in spiral galaxies

The aim of this work is to present our new series of chemical evolution models computed for spiral and low mass galaxies of different total masses and star formation efficiencies. We analyze the results of models, in particular the evolution of the r... Read More about The evolution of the radial gradient of oxygen abundance in spiral galaxies.

HI4PI: A full-sky Hi survey based on EBHIS and GASS (2016)
Journal Article
Ben Bekhti, N., Flöer, L., Keller, R., Kerp, J., Lenz, D., Winkel, B., Bailin, J., Calabretta, M. R., Dedes, L., Ford, H. A., Gibson, B. K., Haud, U., Janowiecki, S., Kalberla, P. M. W., Lockman, F. J., McClure-Griffiths, N. M., Murphy, T., Nakanishi, H., Pisano, D. J., Staveley-Smith, L., & HI4PI Collaboration:. (2016). HI4PI: A full-sky Hi survey based on EBHIS and GASS. Astronomy and Astrophysics, 594, A116. https://doi.org/10.1051/0004-6361/201629178

© 2016 ESO. Context. Measurement of the Galactic neutral atomic hydrogen (H i) column density, NH i, and brightness temperatures, TB, is of high scientific value for a broad range of astrophysical disciplines. In the past two decades, one of the most... Read More about HI4PI: A full-sky Hi survey based on EBHIS and GASS.