Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Denis Erkal"'
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 1, p 55 (2024)
Stellar streams are sensitive tracers of the gravitational potential, which is typically assumed to be static in the inner Galaxy. However, massive mergers like Gaia-Sausage-Enceladus can impart torques on the stellar disk of the Milky Way that resul
Externí odkaz:
https://doaj.org/article/9229498cb3424a5ea6d550a8605f0607
Autor:
Xiaowei Ou, Anirudh Chiti, Nora Shipp, Joshua D. Simon, Marla Geha, Anna Frebel, Mohammad K. Mardini, Denis Erkal, Lina Necib
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 33 (2024)
The Hercules ultrafaint dwarf galaxy (UFD) has long been hypothesized to be tidally disrupting, yet no conclusive evidence has been found for tidal disruption owing partly to difficulties in identifying Hercules member stars. In this work, we present
Externí odkaz:
https://doaj.org/article/d4e2e864b159417682b591e106f2821c
Autor:
Seppo Laine, David Martínez-Delgado, Kristi A. Webb, Mohammad Akhlaghi, Roberto Baena-Gallé, Sanjaya Paudel, Michael Stein, Denis Erkal
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 2, p 111 (2024)
We have investigated the properties (e.g., age, metallicity) of the stellar populations of a ringlike tidal stellar stream (or streams) around the edge-on galaxy SPRC047 ( z = 0.031) using spectral energy distribution (SED) fits to integrated broadba
Externí odkaz:
https://doaj.org/article/1af9aa85800946fca4c5555f2ae1ef93
Autor:
Nora Shipp, Nondh Panithanpaisal, Lina Necib, Robyn Sanderson, Denis Erkal, Ting S. Li, Isaiah B. Santistevan, Andrew Wetzel, Lara R. Cullinane, Alexander P. Ji, Sergey E. Koposov, Kyler Kuehn, Geraint F. Lewis, Andrew B. Pace, Daniel B. Zucker, Joss Bland-Hawthorn, Emily C. Cunningham, Stacy Y. Kim, Sophia Lilleengen, Jorge Moreno, Sanjib Sharma, S Collaboration & FIRE Collaboration
Publikováno v:
The Astrophysical Journal, Vol 949, Iss 2, p 44 (2023)
We present the first detailed comparison of populations of dwarf galaxy stellar streams in cosmological simulations and the Milky Way. In particular, we compare streams identified around 13 Milky Way analogs in the FIRE-2 simulations to streams obser
Externí odkaz:
https://doaj.org/article/115a7d1e312e40538e7b8b7eeb754780
Autor:
Keith Hawkins, Adrian M. Price-Whelan, Allyson A. Sheffield, Aidan Z. Subrahimovic, Rachael L. Beaton, Vasily Belokurov, Denis Erkal, Sergey E. Koposov, Richard R. Lane, Chervin F. P. Laporte, Christian Nitschelm
Publikováno v:
The Astrophysical Journal, Vol 948, Iss 2, p 123 (2023)
Stellar streams in the Galactic halo are useful probes of the assembly of galaxies like the Milky Way. Many tidal stellar streams that have been found in recent years are accompanied by a known progenitor globular cluster or dwarf galaxy. However, th
Externí odkaz:
https://doaj.org/article/fdfb04d66cc2469c94ac90d8a7477c3c
Autor:
David Martínez-Delgado, Andrew P. Cooper, Javier Román, Annalisa Pillepich, Denis Erkal, Sarah Pearson, John Moustakas, Chervin F. P. Laporte, Seppo Laine, Mohammad Akhlaghi, Dustin Lang, Dmitry Makarov, Alejandro S. Borlaff, Giuseppe Donatiello, William J. Pearson, Juan Miró-Carretero, Jean-Charles Cuillandre, Helena Domínguez, Santi Roca-Fàbrega, Carlos S. Frenk, Judy Schmidt, María A. Gómez-Flechoso, Rafael Guzman, Noam I. Libeskind, Arjun Dey, Benjamin A. Weaver, David Schlegel, Adam D. Myers, Frank G. Valdes
Publikováno v:
Astronomy & Astrophysics, 2023, Vol.671 [Peer Reviewed Journal]
Mergers and tidal interactions between massive galaxies and their dwarf satellites are a fundamental prediction of the Lambda-Cold Dark Matter cosmology. These events are thought to provide important observational diagnostics of nonlinear structure f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::28b61fff4aaded8cceb25ae95ea4c8b6
https://resolver.caltech.edu/CaltechAUTHORS:20230502-856709200.3
https://resolver.caltech.edu/CaltechAUTHORS:20230502-856709200.3
Autor:
Zhen Wan, Anthony D Arnold, William H Oliver, Geraint F Lewis, Holger Baumgardt, Mark Gieles, Vincent Hénault-Brunet, Thomas de Boer, Eduardo Balbinot, Gary Da Costa, Dougal Mackey, Denis Erkal, Annette Ferguson, Pete Kuzma, Elena Pancino, Jorge Peñarrubia, Nicoletta Sanna, Antonio Sollima, Roeland P van der Marel, Laura L Watkins
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 519(1), 192-207. Oxford University Press
We present the results of a spectroscopic survey of the outskirts of 4 globular clusters -- NGC 1261, NGC 4590, NGC 1904, and NGC 1851 -- covering targets within 1 degree from the cluster centres, with 2dF/AAOmega on the Anglo-Australian Telescope (A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee05bc93fd548b6feb47d3f9f11bbd81
https://research.rug.nl/en/publications/a9ec9761-fd53-49e9-a537-f8514cbe23e7
https://research.rug.nl/en/publications/a9ec9761-fd53-49e9-a537-f8514cbe23e7
Autor:
Shoko Jin, Scott C Trager, Gavin B Dalton, J Alfonso L Aguerri, J E Drew, Jesús Falcón-Barroso, Boris T Gänsicke, Vanessa Hill, Angela Iovino, Matthew M Pieri, Bianca M Poggianti, D J B Smith, Antonella Vallenari, Don Carlos Abrams, David S Aguado, Teresa Antoja, Alfonso Aragón-Salamanca, Yago Ascasibar, Carine Babusiaux, Marc Balcells, R Barrena, Giuseppina Battaglia, Vasily Belokurov, Thomas Bensby, Piercarlo Bonifacio, Angela Bragaglia, Esperanza Carrasco, Ricardo Carrera, Daniel J Cornwell, Lilian Domínguez-Palmero, Kenneth J Duncan, Benoit Famaey, Cecilia Fari na, Oscar A Gonzalez, Steve Guest, Nina A Hatch, Kelley M Hess, Matthew J Hoskin, Mike Irwin, Johan H Knapen, Sergey E Koposov, Ulrike Kuchner, Clotilde Laigle, Jim Lewis, Marcella Longhetti, Sara Lucatello, Jairo Méndez-Abreu, Amata Mercurio, Alireza Molaeinezhad, Maria Monguió, Sean Morrison, David N A Murphy, Luis Peralta de Arriba, Isabel Pérez, Ignasi Pérez-Ràfols, Sergio Picó, Roberto Raddi, Mercè Romero-Gómez, Frédéric Royer, Arnaud Siebert, George M Seabroke, Debopam Som, David Terrett, Guillaume Thomas, Roger Wesson, C Clare Worley, Emilio J Alfaro, Carlos Allende Prieto, Javier Alonso-Santiago, Nicholas J Amos, Richard P Ashley, Lola Balaguer-Nú nez, Eduardo Balbinot, Michele Bellazzini, Chris R Benn, Sara R Berlanas, Edouard J Bernard, Philip Best, Daniela Bettoni, Andrea Bianco, Georgia Bishop, Michael Blomqvist, Corrado Boeche, Micol Bolzonella, Silvia Bonoli, Albert Bosma, Nikolay Britavskiy, Gianni Busarello, Elisabetta Caffau, Tristan Cantat-Gaudin, Alfred Castro-Ginard, Guilherme Couto, Juan Carbajo-Hijarrubia, David Carter, Laia Casamiquela, Ana M Conrado, Pablo Corcho-Caballero, Luca Costantin, Alis Deason, Abel de Burgos, Sabrina De Grandi, Paola Di Matteo, Jesús Domínguez-Gómez, Ricardo Dorda, Alyssa Drake, Rajeshwari Dutta, Denis Erkal, Sofia Feltzing, Anna Ferré-Mateu, Diane Feuillet, Francesca Figueras, Matteo Fossati, Elena Franciosini, Antonio Frasca, Michele Fumagalli, Anna Gallazzi, Rubén García-Benito, Nicola Gentile Fusillo, Marwan Gebran, James Gilbert, T M Gledhill, Rosa M González Delgado, Robert Greimel, Mario Giuseppe Guarcello, Jose Guerra, Marco Gullieuszik, Christopher P Haines, Martin J Hardcastle, Amy Harris, Misha Haywood, Amina Helmi, Nauzet Hernandez, Artemio Herrero, Sarah Hughes, Vid Irsic, Pascale Jablonka, Matt J Jarvis, Carme Jordi, Rohit Kondapally, Georges Kordopatis, Jens-Kristian Krogager, Francesco La Barbera, Man I Lam, Søren S Larsen, Bertrand Lemasle, Ian J Lewis, Emilie Lhomé, Karin Lind, Marcello Lodi, Alessia Longobardi, Ilaria Lonoce, Laura Magrini, Jesús Maíz Apellániz, Olivier Marchal, Amparo Marco, Nicolas F Martin, Tadafumi Matsuno, Sophie Maurogordato, Paola Merluzzi, Jordi Miralda-Escudé, Emilio Molinari, Giacomo Monari, Lorenzo Morelli, Christopher J Mottram, Tim Naylor, Ignacio Negueruela, Jose Onorbe, Elena Pancino, Sébastien Peirani, Reynier F Peletier, Lucia Pozzetti, Monica Rainer, Pau Ramos, Shaun C Read, Elena Maria Rossi, Huub J A Röttgering, Jose Alberto Rubi no-Martín, Jose Sabater Montes, José San Juan, Nicoletta Sanna, Ellen Schallig, Ricardo P Schiavon, Mathias Schultheis, Paolo Serra, Timothy W Shimwell, Sergio Simón-Díaz, Russell J Smith, Rosanna Sordo, Daniele Sorini, Caroline Soubiran, Else Starkenburg, Iain A Steele, John Stott, Remko Stuik, Eline Tolstoy, Crescenzo Tortora, Maria Tsantaki, Mathieu Van der Swaelmen, Reinout J van Weeren, Daniela Vergani, Marc A W Verheijen, Kristiina Verro, Jorick S Vink, Miguel Vioque, C Jakob Walcher, Nicholas A Walton, Christopher Wegg, Anne-Marie Weijmans, Wendy L Williams, Andrew J Wilson, Nicholas J Wright, Theodora Xylakis-Dornbusch, Kris Youakim, Stefano Zibetti, Cristina Zurita
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 2023, ⟨10.1093/mnras/stad557⟩
Monthly Notices of the Royal Astronomical Society, 2023, ⟨10.1093/mnras/stad557⟩
WEAVE, the new wide-field, massively multiplexed spectroscopic survey facility for the William Herschel Telescope, will see first light in late 2022. WEAVE comprises a new 2-degree field-of-view prime-focus corrector system, a nearly 1000-multiplex f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e703a657cd480f114b6f6cbe52ae052
https://hal-insu.archives-ouvertes.fr/insu-04040492
https://hal-insu.archives-ouvertes.fr/insu-04040492
Autor:
Lina Necib, Helmut Jerjen, Anna Frebel, Anirudh Chiti, Laura J. Chang, Alexander P. Ji, Denis Erkal, Joshua D. Simon, Dongwon Kim, John E. Norris
Publikováno v:
Nature Astronomy. 5:392-400
The Milky Way is surrounded by dozens of ultra-faint (< $10^5$ solar luminosities) dwarf satellite galaxies. They are the surviving remnants of the earliest galaxies, as confirmed by their ancient (~13 billion years old) and chemically primitive star
Autor:
Denis Erkal, Lara R. Cullinane, G. S. Da Costa, Sergey E. Koposov, Alasdair Mackey, Vasily Belokurov
Publikováno v:
Cullinane, L R, Mackey, A D, Costa, G S D, Erkal, D, Koposov, S E & Belokurov, V 2022, ' The Magellanic Edges Survey II. Formation of the LMC's northern arm ', Monthly Notices of the Royal Astronomical Society, vol. 510, no. 1, pp. 445-468 . https://doi.org/10.1093/mnras/stab3350
The highly-substructured outskirts of the Magellanic Clouds provide ideal locations for studying the complex interaction history between both Clouds and the Milky Way (MW). In this paper, we investigate the origin of a >20$^\circ$ long arm-like featu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ad6275115b97a75364dd5b4e5c2dc36
https://www.pure.ed.ac.uk/ws/files/241297003/44045076_File000000_1080181569.pdf
https://www.pure.ed.ac.uk/ws/files/241297003/44045076_File000000_1080181569.pdf