Results 11 to 20 of about 28,044 (289)

Stellar Population Properties in the Stellar Streams around SPRC047

The Astrophysical Journal
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 ...
Seppo Laine, David Martínez-Delgado, Kristi A. Webb, Mohammad Akhlaghi, Roberto Baena-Gallé, Sanjaya Paudel, Michael Stein, Denis Erkal   +7 more
doaj   +4 more sources

Stellar streams discovered in the Dark Energy Survey [PDF]

The Astrophysical Journal, 2018
We perform a search for stellar streams around the Milky Way using the first 3 yr of multiband optical imaging data from the Dark Energy Survey (DES).
A. A. Plazas, A. B. Pace, A. Drlica-Wagner, A. E. Evrard, A. K. Romer, A. K. Vivas, A. R. Walker, A. Zenteno, An D., An D., B. Buncher, B. Flaugher, B. Hoyle, B. Santiago, B. Yanny, Balbinot E., Bechtol K., Bell E. F., Belokurov V., Belokurov V., Belokurov V., Belokurov V., Belokurov V., Bertin E., Besla G., Bonaca A., Bonaca A., Bovy J., Bovy J., Bullock J. S., Burke D., C. B. D’Andrea, C. Davis, C. E. Cunha, C. J. Miller, Carlberg R. G., Carlberg R. G., Carlberg R. G., Carollo D., Chabrier G., D. Brooks, D. Carollo, D. Erkal, D. Gruen, D. J. James, D. L. Burke, D. L. Tucker, D. Thomas, D. W. Gerdes, de Grijs R., de Jong J. T. A., DES Collaboration, DES Collaboration, DES Collaboration, Dinescu D. I., Dotter A., Drlica-Wagner A., Drlica-Wagner A., Drlica-Wagner A., E. Balbinot, E. Bertin, E. Gaztanaga, E. Krause, E. S. Rykoff, E. Sanchez, E. Sheldon, E. Suchyta, F. B. Abdalla, F. J. Castander, F. Menanteau, F. Sobreira, Fitzpatrick E. L., Flaugher B., Foreman-Mackey D., G. Gutierrez, G. Tarle, Gillessen S., Gnedin O. Y., Grillmair C. J., Grillmair C. J., Grillmair C. J., Grillmair C. J., Grillmair C. J., Górski K. M., H. Lin, H. T. Diehl, Hattori K., I. Sevilla-Noarbe, Ibata R., J. Carretero, J. De Vicente, J. Frieman, J. García-Bellido, J. Gschwend, J. L. Marshall, Jethwa P., Johnston K. V., Johnston K. V., Johnston K. V., Jones E., Jurić M., K. Bechtol, K. Honscheid, K. Kuehn, Kim D., Kirby E. N., Koposov S., Koposov S. E., Koposov S. E., Küpper A. H. W., L. N. da Costa, L. Strigari, Law D. R., Law D. R., Leon S., Li T. S., LSST Science Collaboration, M. A. G. Maia, M. Carrasco Kind, M. Crocce, M. D. Johnson, M. E. C. Swanson, M. March, M. Sako, M. Schubnell, M. Smith, Majewski S. R., Majewski S. R., Mateu C., Morganson E., N. Kuropatkin, N. Shipp, Newberg H. J., Newberg H. J., Ngan W. H. W., Nidever D. L., Nidever D. L., O. Lahav, Odenkirchen M., Olszewski E. W., P. Doel, P. Ferguson, P. Fosalba, P. Martini, Pearson S., Price-Whelan A. M., R. A. Gruendl, R. C. Nichol, R. C. Smith, R. Cawthon, R. H. Wechsler, R. Miquel, R. Schindler, Rocha-Pinto H. J., Rockosi C. M., S. Allam, S. Avila, S. Desai, Sanderson R. E., Schlafly E. F., Schlegel D. J., Simon J. D., T. M. C. Abbott, T. S. Li, V. Belokurov, V. Scarpine, W. Hartley, Willman B., Willman B., Yanny B., Yoon J. H., York D. G., Zucker D. B., Zucker D. B.   +173 more
core   +10 more sources

StarStream: Automatic Detection Algorithm for Stellar Streams

The Astrophysical Journal
The Gaia mission has led to the discovery of over 100 stellar streams in the Milky Way, most of which likely originated from globular clusters (GCs).
Yingtian Chen, Oleg Y. Gnedin, Adrian M. Price-Whelan, Colin Holm-Hansen   +3 more
doaj   +3 more sources

Variation in the stellar mass function along stellar streams [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
ABSTRACT Stellar streams are the inevitable end product of star cluster evolution, with the properties of a given stream being related to its progenitor. We consider how the dynamical history of a progenitor cluster, as traced by the evolution of its stellar mass function, is reflected in the resultant stream.
Jeremy J Webb, Jo Bovy
openaire   +2 more sources

Stellar streams in chameleon gravity [PDF]

Physical Review D, 2020
Theories of gravity that incorporate new scalar degrees of freedom typically require screening mechanisms to ensure consistency with Solar System tests. One widely-studied mechanism -- the chameleon -- can lead to violations of the equivalence principle (EP), as screened and unscreened objects fall differently.
A. P. Naik, N. W. Evans, E. Puchwein, H. Zhao, A.-C. Davis   +4 more
openaire   +4 more sources

The Southern Stellar Stream Spectroscopic Survey (S⁵): Chemical Abundances of Seven Stellar Streams [PDF]

The Astronomical Journal, 2020
Abstract We present high-resolution Magellan/MIKE spectroscopy of 42 red giant stars in seven stellar streams confirmed by the Southern Stellar Stream Spectroscopic Survey (S 5): ATLAS, Aliqa Uma, Chenab, Elqui, Indus, Jhelum, and Phoenix.
Alexander P. Ji, Ting S. Li, Terese T. Hansen, Andrew R. Casey, Sergey E. Koposov, Andrew B. Pace, Dougal Mackey, Geraint F. Lewis, Jeffrey D. Simpson, Joss Bland-Hawthorn, Lara R. Cullinane, Gary. S. Da Costa, Kohei Hattori, Sarah L. Martell, Kyler Kuehn, Denis Erkal, Nora Shipp, Zhen Wan, Daniel B. Zucker   +18 more
openaire   +3 more sources

Stellar streams as gravitational experiments [PDF]

Astronomy & Astrophysics, 2018
Kinematically cold tidal streams of globular clusters (GC) are excellent tracers of the Galactic gravitational potential at moderate Galactocentric distances, and can also be used as probes of the law of gravity on Galactic scales. Here, we compare for the first time the generation of such streams in Newtonian and Milgromian gravity (MOND).
Thomas, G. F., Famaey, Benoit, Ibata, Rodrigo, Renaud, F., Martin, Nicolas F., Kroupa, P.   +5 more
openaire   +4 more sources

The structure of accreted stellar streams [PDF]

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT Many of the Milky Way’s globular clusters are likely accreted from satellite galaxies that have long since merged with the Milky Way. When these globular clusters are susceptible to tidal disruption, this process likely starts already inside the parent satellite leading to an early stellar stream within the satellite.
Yansong Qian, Yumna Arshad, Jo Bovy
openaire   +2 more sources

A cold stellar stream in Pegasus [PDF]

Monthly Notices of the Royal Astronomical Society, 2019
We report the serendipitous discovery of a stellar stream in the constellation Pegasus in the south Galactic hemisphere. The stellar stream was detected using the SDSS Data Release 14 by means of a matched filter in the color--magnitude diagram that is optimised for a stellar population that is 8 Gyr old with [Fe/H] = $-$0.46 dex, and located at ...
Hélio D Perottoni, Charles Martin, Heidi Jo Newberg, Helio J Rocha-Pinto, Felipe de Almeida-Fernandes, Altair R Gomes-Júnior   +5 more
openaire   +4 more sources

Chemical abundances of the Typhon stellar stream

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT We present the first high-resolution chemical abundances of seven stars in the recently discovered high-energy stream Typhon. Typhon stars have apocentres r ≳ 100 kpc, making this the first detailed chemical picture of the Milky Way’s very distant stellar halo.
Alexander P Ji, Rohan P Naidu, Kaley Brauer, Yuan-Sen Ting, Joshua D Simon   +4 more
openaire   +2 more sources