Results 1 to 10 of about 28,044 (289)

Dynamics of stellar and HI streams in the Milky Way halo

EPJ Web of Conferences, 2012
Stellar streams are key players in many aspects of Milky Way studies and, in particular, studying their orbital dynamics is crucial for furthering our understanding of the Milky Wayʼs gravitational potential.
Jin S.
doaj   +3 more sources

Dependence of stellar substructures in M31 type galaxy on satellite morphology in galaxy mergers [PDF]

Serbian Astronomical Journal, 2022
Stellar streams and shells are observed in halos of spiral galaxies. In this paper, we investigated the formation of these structures due to mergers between the host spiral galaxy and its dwarf satellite galaxies.
Milošević S.
doaj   +1 more source

Streams on FIRE: Populations of Detectable Stellar Streams in the Milky Way and FIRE

The Astrophysical Journal, 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 observed ...
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   +21 more
doaj   +1 more source

Building an Acceleration Ladder with Tidal Streams and Pulsar Timing

The Astrophysical Journal Letters, 2023
We analyse stellar streams in action-angle coordinates combined with recent local direct acceleration measurements to provide joint constraints on the potential of our galaxy.
Peter Craig, Sukanya Chakrabarti, Robyn E. Sanderson, Farnik Nikakhtar   +3 more
doaj   +1 more source

A Dwarf Galaxy Debris Stream Associated with Palomar 1 and the Anticenter Stream

The Astrophysical Journal Letters, 2023
We report the discovery of a new stream (dubbed as Yangtze) detected in Gaia Data Release 3. The stream is at a heliocentric distance of ∼9.12 kpc and spans nearly 27° by 1.°9 on the sky.
Yong Yang, Jing-Kun Zhao, Xian-Hao Ye, Gang Zhao, Ke-Feng Tan   +4 more
doaj   +1 more source

Stream Fanning and Bifurcations: Observable Signatures of Resonances in Stellar Stream Morphology

The Astrophysical Journal, 2023
Recent observations have revealed a trove of unexpected morphological features in many of the Milky Way’s stellar streams. Explanations for such features include time-dependent deformations of the Galactic gravitational potential, local disruptions ...
Tomer D. Yavetz, Kathryn V. Johnston, Sarah Pearson, Adrian M. Price-Whelan, Chris Hamilton   +4 more
doaj   +1 more source

On the Hunt for the Origins of the Orphan–Chenab Stream: Detailed Element Abundances with APOGEE and Gaia

The Astrophysical Journal, 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.
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   +10 more
doaj   +1 more source

The stellar halo of the Galaxy [PDF]

, 2008
Stellar halos may hold some of the best preserved fossils of the formation history of galaxies. They are a natural product of the merging processes that probably take place during the assembly of a galaxy, and hence may well be the most ubiquitous ...
A Frebel, A Frebel, A Gould, A Gould, A Heger, A Helmi, A Helmi, A Helmi, A Helmi, A Helmi, A Helmi, A Helmi, A Helmi, A Helmi, A Helmi, A Klypin, A Klypin, A Koch, A McWilliam, A Moitinho, A Sarajedini, AA Kepley, AC Layden, AC Layden, AC Robin, AC Robin, AD Mackey, AJ Benson, AK Vivas, AK Vivas, Amina Helmi, AP Digby, AR Zentner, AS Font, AV Kravtsov, AV Kravtsov, AW McConnachie, B Chaboyer, B Chen, B Famaey, B Fuchs, B Letarte, B Moore, B Moore, B Paczynski, B Yanny, B Yanny, BMS Hansen, BW Carney, C Chiappini, C Flynn, C Sneden, C Travaglio, CB Brook, CB Brook, CJ Grillmair, CJ Grillmair, CJ Grillmair, CJ Grillmair, CS Frenk, D Carollo, D Geisler, D Lynden-Bell, D Martínez-Delgado, D Martínez-Delgado, D Martínez-Delgado, D Minniti, DI Casetti-Dinescu, DI Dinescu, DJ Lemon, DN Spergel, DR Law, E Bica, E Carretta, E Sirko, E Tolstoy, E Tolstoy, F De Angeli, F Hammer, F Matteucci, F Stoehr, FDA Hartwick, G Battaglia, G Battaglia, G Cescutti, G Gilmore, G Gilmore, G Gilmore, G Kauffmann, G Piotto, GM De Silva, GM Seabroke, GW Preston, H Baumgardt, H Shapley, H Umeda, HJ Newberg, HJ Newberg, HJ Newberg, HJ Rocha-Pinto, HL Morrison, HL Morrison, HL Morrison, II Ivans, J Binney, J Bland-Hawthorn, J Diemand, J Mould, J Peñarrubia, J Silk, J Sommer-Larsen, J Sommer-Larsen, J Tumlinson, JC Kapteyn, JC Wheeler, JD Simon, JF Navarro, JF Navarro, JG Cohen, JK Adelman-McCarthy, JN Bahcall, JP Fulbright, JS Bullock, JS Bullock, JS Bullock, JS Kalirai, K Bekki, KA Venn, KC Freeman, KM Ashman, KU Ratnatunga, KV Johnston, KV Johnston, KV Johnston, KV Johnston, L Clewley, L Clewley, L Gao, L Mayer, L Searle, LV Sales, M Arnould, M Bellazzini, M Chiba, M Chiba, M Chiba, M Fellhauer, M Juric, M Mateo, M Metz, M Mouhcine, M Mouhcine, M Mouhcine, M Odenkirchen, M Samland, M Schmidt, M Shetrone, M Shetrone, M Steinmetz, M Steinmetz, M Unavane, M-M Mac Low, MA Gómez-Flechoso, MAC Perryman, MC Smith, MG Abadi, MG Abadi, MH Siegel, MH Siegel, MI Wilkinson, ML Mateo, N Libeskind, NB Suntzeff, NC Hambly, NF Martin, NF Martin, NY Gnedin, OJ Eggen, P Côté, P François, P Harding, P Kroupa, PB Stetson, PB Stetson, PD Sackett, PE Nissen, PE Nissen, PJ Quinn, PS Barklem, R Cayrel, R Cayrel, R Ibata, R Ibata, R Ibata, R Ibata, R Schneider, RC Dohm-Palmer, RP Marel van der, RP Marel van der, RS Somerville, S Duffau, S Lucatello, S Phleps, S Piatek, S Salvadori, S Torres, S Zibetti, SC Chapman, SDM White, SDM White, SG Ryan, SR Majewski, SR Majewski, SR Majewski, SR Majewski, T Abel, TC Beers, TC Beers, TD Kinman, TD Kinman, TM Brown, V Belokurov, V Belokurov, V Belokurov, V Belokurov, V Belokurov, V Bromm, V Hill, V Springel, W Dehnen, WE Harris, X Kang, Y Momany, Y Momany, Y Xu, Y Xu, Y-W Lee, YS Li, YW Lee, Z Zheng, Ž Ivezić   +240 more
core   +10 more sources

Modeling the gravitational potential of a cosmological dark matter halo with stellar streams [PDF]

, 2016
Stellar streams result from the tidal disruption of satellites and star clusters as they orbit a host galaxy, and can be very sensitive probes of the gravitational potential of the host system. We select and study narrow stellar streams formed in a Milky-
Hartke, Johanna, Helmi, Amina, Sanderson, Robyn E.   +2 more
core   +2 more sources

The Hough Stream Spotter: A New Method for Detecting Linear Structure in Resolved Stars and Application to the Stellar Halo of M31

The Astrophysical Journal, 2022
Stellar streams from globular clusters (GCs) offer constraints on the nature of dark matter and have been used to explore the dark matter halo structure and substructure of our Galaxy. Detection of GC streams in other galaxies would broaden this endeavor
Sarah Pearson, Susan E. Clark, Alexis J. Demirjian, Kathryn V. Johnston, Melissa K. Ness, Tjitske K. Starkenburg, Benjamin F. Williams, Rodrigo A. Ibata   +7 more
doaj   +1 more source