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1.090 Treffer

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  1. Detailansicht für Treffer 1 öffnen
    New Velocity Measurements of NGC 5128 Globular Clusters Out to 130 kpc: Outer Halo Kinematics, Substructure, and Dynamics
    Hughes, Allison K. ; Sand, David J. ; et al.
    In: ISSN: 0004-637X, 2023
    Online academicJournal
    Zugriff:
    Volltext
    Wie komme ich dran?
  2. Detailansicht für Treffer 2 öffnen
    New Velocity Measurements of NGC 5128 Globular Clusters Out to 130 kpc: Outer Halo Kinematics, Substructure, and Dynamics
    Hughes, Allison K. ; Sand, David J. ; et al.
    In: ISSN: 0004-637X, 2023
    Online academicJournal
    Zugriff:
    Volltext
    Wie komme ich dran?
  3. Detailansicht für Treffer 3 öffnen
    NGC 5128 Globular Cluster Candidates Out to 150 kpc: A Comprehensive Catalog from Gaia and Ground-based Data* ; We present a new catalog of 40,502 globular cluster (GC) candidates in NGC 5128 out to a projected radius of ~150 kpc based on data from the Panoramic Imaging Survey of Centaurus and Sculptor, the Gaia Data Release 2, and the NOAO Source Catalog. Ranking these candidates based on the likelihood that they are true GCs, we find that approximately 1900 belong to our top two ranking categories and should be the highest priority for spectroscopic follow-up for confirmation. Taking into account our new data and a vetting of previous GC catalogs, we estimate a total GC population of 1450 ± 160 GCs. We show that a substantial number of sources previously argued to be low-velocity GCs are instead foreground stars, reducing the inferred GC velocity dispersion. This work showcases the power of Gaia to identify slightly extended sources at the ~4 Mpc distance of NGC 5128, enabling accurate identification of GCs throughout the entire extended halo, not just the inner regions that have been the focus of most previous work. * This paper includes data gathered with the 6.5 m Magellan Telescope at Las Campanas Observatory, Chile.
    Hughes, Allison ; Sand, David ; et al.
    In: ISSN: 0004-637X, 2021
    academicJournal
    Wie komme ich dran?
  4. Detailansicht für Treffer 4 öffnen
    NGC 5128 Globular Cluster Candidates Out to 150 kpc: A Comprehensive Catalog from Gaia and Ground-based Data* ; We present a new catalog of 40,502 globular cluster (GC) candidates in NGC 5128 out to a projected radius of ~150 kpc based on data from the Panoramic Imaging Survey of Centaurus and Sculptor, the Gaia Data Release 2, and the NOAO Source Catalog. Ranking these candidates based on the likelihood that they are true GCs, we find that approximately 1900 belong to our top two ranking categories and should be the highest priority for spectroscopic follow-up for confirmation. Taking into account our new data and a vetting of previous GC catalogs, we estimate a total GC population of 1450 ± 160 GCs. We show that a substantial number of sources previously argued to be low-velocity GCs are instead foreground stars, reducing the inferred GC velocity dispersion. This work showcases the power of Gaia to identify slightly extended sources at the ~4 Mpc distance of NGC 5128, enabling accurate identification of GCs throughout the entire extended halo, not just the inner regions that have been the focus of most previous work. * This paper includes data gathered with the 6.5 m Magellan Telescope at Las Campanas Observatory, Chile.
    Hughes, Allison ; Sand, David ; et al.
    In: ISSN: 0004-637X, 2021
    academicJournal
    Wie komme ich dran?
  5. Detailansicht für Treffer 5 öffnen
    Evidence of a Dwarf Galaxy Stream Populating the Inner Milky Way Halo ; Stellar streams produced from dwarf galaxies provide direct evidence of the hierarchical formation of the Milky Way. Here, we present the first comprehensive study of the LMS-1 stellar stream, that we detect by searching for wide streams in the Gaia EDR3 data set using the STREAMFINDER algorithm. This stream was recently discovered by Yuan et al. We detect LMS-1 as a 60° long stream to the north of the galactic bulge, at a distance of ~20 kpc from the Sun, together with additional components that suggest that the overall stream is completely wrapped around the inner Galaxy. Using spectroscopic measurements from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, the Sloan Digital Sky Survey, and the Apache Point Observatory Galactic Evolution Experiment, we infer that the stream is very metal-poor (⟨[Fe/H]⟩ = -2.1) with a significant metallicity dispersion (σ[Fe/H] = 0.4), and it possesses a large radial velocity dispersion (σv = 20 ± 4 km s-1). These estimates together imply that LMS-1 is a dwarf galaxy stream. The orbit of LMS-1 is close to polar, with an inclination of 75° to the galactic plane. Both the orbit and metallicity of LMS-1 are remarkably similar to the globular clusters NGC 5053, NGC 5024, and the stellar stream Indus. These findings make LMS-1 an important contributor to the stellar population of the inner Milky Way halo.
    Malhan, Khyati ; Yuan, Zhen ; et al.
    In: ISSN: 0004-637X, 2021
    academicJournal
    Wie komme ich dran?
  6. Detailansicht für Treffer 6 öffnen
    Charting the Galactic Acceleration Field. I. A Search for Stellar Streams with Gaia DR2 and EDR3 with Follow-up from ESPaDOnS and UVES ; We present maps of the stellar streams detected in the Gaia Data Release 2 (DR2) and Early Data Release 3 (EDR3) catalogs using the STREAMFINDER algorithm. We also report the spectroscopic follow-up of the brighter DR2 stream members obtained with the high-resolution CFHT/ESPaDOnS and VLT/UVES spectrographs as well as with the medium-resolution NTT/EFOSC2 spectrograph. Two new stellar streams that do not have a clear progenitor are detected in DR2 (named Hríd and Gunnthrá), and seven are detected in EDR3 (named Gaia-6 to Gaia-12). Several candidate streams are also identified. The software also finds very long tidal tails associated with the 15 globular clusters: NGC 288, NGC 1261, NGC 1851, NGC 2298, NGC 2808, NGC 3201, M68, ωCen, NGC 5466, Palomar 5, M5, NGC 6101, M92, NGC 6397, and NGC 7089. These stellar streams will be used in subsequent contributions in this series to chart the properties of the Galactic acceleration field on ~100 pc to ~100 kpc scales.
    Ibata, Rodrigo ; Malhan, Khyati ; et al.
    In: ISSN: 0004-637X, 2021
    academicJournal
    Wie komme ich dran?
  7. Detailansicht für Treffer 7 öffnen
    Charting the Galactic Acceleration Field. I. A Search for Stellar Streams with Gaia DR2 and EDR3 with Follow-up from ESPaDOnS and UVES ; We present maps of the stellar streams detected in the Gaia Data Release 2 (DR2) and Early Data Release 3 (EDR3) catalogs using the STREAMFINDER algorithm. We also report the spectroscopic follow-up of the brighter DR2 stream members obtained with the high-resolution CFHT/ESPaDOnS and VLT/UVES spectrographs as well as with the medium-resolution NTT/EFOSC2 spectrograph. Two new stellar streams that do not have a clear progenitor are detected in DR2 (named Hríd and Gunnthrá), and seven are detected in EDR3 (named Gaia-6 to Gaia-12). Several candidate streams are also identified. The software also finds very long tidal tails associated with the 15 globular clusters: NGC 288, NGC 1261, NGC 1851, NGC 2298, NGC 2808, NGC 3201, M68, ωCen, NGC 5466, Palomar 5, M5, NGC 6101, M92, NGC 6397, and NGC 7089. These stellar streams will be used in subsequent contributions in this series to chart the properties of the Galactic acceleration field on ~100 pc to ~100 kpc scales.
    Ibata, Rodrigo ; Malhan, Khyati ; et al.
    In: ISSN: 0004-637X, 2021
    academicJournal
    Wie komme ich dran?
  8. Detailansicht für Treffer 8 öffnen
    Evidence of a Dwarf Galaxy Stream Populating the Inner Milky Way Halo ; Stellar streams produced from dwarf galaxies provide direct evidence of the hierarchical formation of the Milky Way. Here, we present the first comprehensive study of the LMS-1 stellar stream, that we detect by searching for wide streams in the Gaia EDR3 data set using the STREAMFINDER algorithm. This stream was recently discovered by Yuan et al. We detect LMS-1 as a 60° long stream to the north of the galactic bulge, at a distance of ~20 kpc from the Sun, together with additional components that suggest that the overall stream is completely wrapped around the inner Galaxy. Using spectroscopic measurements from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, the Sloan Digital Sky Survey, and the Apache Point Observatory Galactic Evolution Experiment, we infer that the stream is very metal-poor (⟨[Fe/H]⟩ = -2.1) with a significant metallicity dispersion (σ[Fe/H] = 0.4), and it possesses a large radial velocity dispersion (σv = 20 ± 4 km s-1). These estimates together imply that LMS-1 is a dwarf galaxy stream. The orbit of LMS-1 is close to polar, with an inclination of 75° to the galactic plane. Both the orbit and metallicity of LMS-1 are remarkably similar to the globular clusters NGC 5053, NGC 5024, and the stellar stream Indus. These findings make LMS-1 an important contributor to the stellar population of the inner Milky Way halo.
    Malhan, Khyati ; Yuan, Zhen ; et al.
    In: ISSN: 0004-637X, 2021
    academicJournal
    Wie komme ich dran?
  9. Detailansicht für Treffer 9 öffnen
    Evidence of a Dwarf Galaxy Stream Populating the Inner Milky Way Halo ; Stellar streams produced from dwarf galaxies provide direct evidence of the hierarchical formation of the Milky Way. Here, we present the first comprehensive study of the LMS-1 stellar stream, that we detect by searching for wide streams in the Gaia EDR3 data set using the STREAMFINDER algorithm. This stream was recently discovered by Yuan et al. We detect LMS-1 as a 60° long stream to the north of the galactic bulge, at a distance of ~20 kpc from the Sun, together with additional components that suggest that the overall stream is completely wrapped around the inner Galaxy. Using spectroscopic measurements from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, the Sloan Digital Sky Survey, and the Apache Point Observatory Galactic Evolution Experiment, we infer that the stream is very metal-poor (⟨[Fe/H]⟩ = -2.1) with a significant metallicity dispersion (σ[Fe/H] = 0.4), and it possesses a large radial velocity dispersion (σv = 20 ± 4 km s-1). These estimates together imply that LMS-1 is a dwarf galaxy stream. The orbit of LMS-1 is close to polar, with an inclination of 75° to the galactic plane. Both the orbit and metallicity of LMS-1 are remarkably similar to the globular clusters NGC 5053, NGC 5024, and the stellar stream Indus. These findings make LMS-1 an important contributor to the stellar population of the inner Milky Way halo.
    Malhan, Khyati ; Yuan, Zhen ; et al.
    In: ISSN: 0004-637X, 2021
    academicJournal
    Wie komme ich dran?
  10. Detailansicht für Treffer 10 öffnen
    Molecular Gas Dominated 50 kpc Ram Pressure Stripped Tail of the Coma Galaxy D100
    Jáchym, Pavel ; Sun, Ming ; et al.
    In: ISSN: 0004-637X, 2017
    academicJournal
    Wie komme ich dran?
  11. Detailansicht für Treffer 11 öffnen
    Molecular Gas Dominated 50 kpc Ram Pressure Stripped Tail of the Coma Galaxy D100
    Jáchym, Pavel ; Sun, Ming ; et al.
    In: ISSN: 0004-637X, 2017
    academicJournal
    Wie komme ich dran?
  12. Detailansicht für Treffer 12 öffnen
    Molecular Gas Dominated 50 kpc Ram Pressure Stripped Tail of the Coma Galaxy D100
    Jáchym, Pavel ; Sun, Ming ; et al.
    In: ISSN: 0004-637X, 2017
    academicJournal
    Wie komme ich dran?
  13. Detailansicht für Treffer 13 öffnen
    Molecular Gas Dominated 50 kpc Ram Pressure Stripped Tail of the Coma Galaxy D100
    Jáchym, Pavel ; Sun, Ming ; et al.
    In: ISSN: 0004-637X, 2017
    academicJournal
    Wie komme ich dran?
  14. Detailansicht für Treffer 14 öffnen
    Molecular Gas Dominated 50 kpc Ram Pressure Stripped Tail of the Coma Galaxy D100
    Jáchym, Pavel ; Sun, Ming ; et al.
    In: ISSN: 0004-637X, 2017
    academicJournal
    Wie komme ich dran?
  15. Detailansicht für Treffer 15 öffnen
    The Milky Way's circular-velocity curve between 4 and 14 kpc from apogee data
    Bovy, Jo ; Allende Prieto, Carlos ; et al.
    In: ISSN: 0004-637X, 2012
    academicJournal
    Wie komme ich dran?
  16. Detailansicht für Treffer 16 öffnen
    The Milky Way's circular-velocity curve between 4 and 14 kpc from apogee data
    Bovy, Jo ; Allende Prieto, Carlos ; et al.
    In: ISSN: 0004-637X, 2012
    academicJournal
    Wie komme ich dran?
  17. Detailansicht für Treffer 17 öffnen
    The Milky Way's circular-velocity curve between 4 and 14 kpc from apogee data
    Bovy C.A. Prieto T.C. Beers D. Bizyaev L.N. Da Costa K. Cunha G.L. Ebelke D.J. Eisenstein P.M. Frinchaboy A.E.G. Perez L. Girardi F.R. Hearty D.W. Hogg J. Holtzman M.A.G. Maia S.R. Majewski E. Malanushenko V. Malanushenko S. Meszaros D.L. Nidever R.W. O'C, J. ; Univers, Transport, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213) (UTINAM) ; et al.
    In: ISSN: 0004-637X, 2012
    academicJournal
    Wie komme ich dran?
  18. Detailansicht für Treffer 18 öffnen
    Multiphase Gas Interactions on Subarcsec Scales in the Shocked Intergalactic Medium of Stephan's Quintet with JWST and ALMA
    Appleton, P. N. ; Guillard, P. ; et al.
    In: ISSN: 0004-637X, 2023
    Online academicJournal
    Zugriff:
    Volltext
    Wie komme ich dran?
  19. Detailansicht für Treffer 19 öffnen
    Multiphase Gas Interactions on Subarcsec Scales in the Shocked Intergalactic Medium of Stephan's Quintet with JWST and ALMA
    Appleton, P. N. ; Guillard, P. ; et al.
    In: ISSN: 0004-637X, 2023
    Online academicJournal
    Zugriff:
    Volltext
    Wie komme ich dran?
  20. Detailansicht für Treffer 20 öffnen
    Detection of Multiple Phase Space Overdensities of GSE Stars by Orbit Integration
    Wu, Wenbo ; Zhao, Gang ; et al.
    In: ISSN: 0004-637X, 2023
    Online academicJournal
    Zugriff:
    Volltext
    Wie komme ich dran?

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