Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Jasonjot S. Kalirai"'
Autor:
Marla Geha, S. R. Majewski, Evan N. Kirby, Karoline M. Gilbert, Jasonjot S. Kalirai, Puragra Guhathakurta, Richard J. Patterson, J. C. Ostheimer, Rachael L. Beaton, J. Wolf
Publikováno v:
EAS Publications Series. 48:329-335
We present the first systematic comparison of the detailed properties, including internal kinematics, chemical abundances, sizes, and dark matter masses, of Milky Way and M 31 dSphs as a part of the SPLASH Survey (Spectroscopic and Photometric Landsc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f8422b45594c41a2bf26c736b8b03580
https://doi.org/10.1051/eas/1148075
https://doi.org/10.1051/eas/1148075
Autor:
J. Xavier Prochaska, Kyle F. Kaplan, Andrew Fittingoff, Jay Strader, Puragra Guhathakurta, Jasonjot S. Kalirai
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 399:728-736
We have performed a wide-area ultraviolet (UV) imaging survey using the GALaxy Evolution eXplorer (GALEX) to search for bright, point-like UV sources behind M31's extended halo. Our survey consisted of 46 pointings covering an effective area of ~50 d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::159b86a89e60da2a8e9883a1bd60dca4
https://doi.org/10.1111/j.1365-2966.2009.15370.x
https://doi.org/10.1111/j.1365-2966.2009.15370.x
Autor:
Alvio Renzini, Ed Smith, Masashi Chiba, Henry C. Ferguson, David B. Reitzel, Mikito Tanaka, Thomas M. Brown, Jasonjot S. Kalirai, Yutaka Komiyama, Rachael L. Beaton, Allen V. Sweigart, Steven R. Majewski, Karoline M. Gilbert, R. Michael Rich, Andreas Koch, Masanori Iye, Puragra Guhathakurta
Publikováno v:
The Astrophysical Journal. 685:L121-L124
Using the HST ACS, we have obtained deep optical images reaching well below the oldest main sequence turnoff in fields on the southeast minor-axis of the Andromeda Galaxy, 35 kpc from the nucleus. These data probe the star formation history in the ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6c9d606e39c7e30cd71f06e9509202e
https://doi.org/10.1086/592686
https://doi.org/10.1086/592686
Autor:
Jarrod R. Hurley, Gregory G. Fahlman, Ivan R. King, Jasonjot S. Kalirai, Jay Anderson, R. Michael Rich, Harvey B. Richer, Brad M. S. Hansen, Peter B. Stetson
Publikováno v:
The Astronomical Journal. 135:2114-2128
We describe here the reduction methods that we developed to study the faintest red dwarfs and white dwarfs in an outer field of NGC6397, which was observed by \hst for 126 orbits in 2005. The particular challenge of this data set is that the faintest
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ca44575a2485640a1d3b251804c5c93
https://doi.org/10.1088/0004-6256/135/6/2114
https://doi.org/10.1088/0004-6256/135/6/2114
Autor:
Karoline M. Gilbert, Alvio Renzini, Thomas M. Brown, R. Michael Rich, Ed Smith, Marla Geha, Henry C. Ferguson, Puragra Guhathakurta, Allen V. Sweigart, David Reitzel, Jasonjot S. Kalirai
Publikováno v:
The Astrophysical Journal. 658:L95-L98
Using the HST ACS, we have obtained deep optical images of a southeast minor-axis field in the Andromeda Galaxy, 21 kpc from the nucleus. In both star counts and metallicity, this field represents a transition zone between the metal-rich, highly-dist
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7af1914a9109da5a37e90dd429f82827
https://doi.org/10.1086/515395
https://doi.org/10.1086/515395
Autor:
C. Luine, James C. Ostheimer, David B. Reitzel, Richard J. Patterson, Steven R. Majewski, Puragra Guhathakurta, A. Javier Cenarro, Jasonjot S. Kalirai, Michael C. Cooper, Karoline M. Gilbert, R. Michael Rich
Publikováno v:
The Astrophysical Journal. 652:1188-1212
We present a method for isolating a clean sample of red giant stars in the outerregions of the Andromeda spiral galaxy (M31) from an ongoing spectroscopic survey using the DEIMOS instrument on the Keck 10-m telescope. The survey aims to study the kin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c5cabc83603a815bfa0d8dd8e5b4a18
https://doi.org/10.1086/508643
https://doi.org/10.1086/508643
Autor:
John B. Anderson, Brad M. S. Hansen, Jasonjot S. Kalirai, R. Michael Rich, James Brewer, David Reitzel, Ivan R. King, Michael M. Shara, Peter B. Stetson, Jarrod R. Hurley, S. Davis, Harvey B. Richer, Gregory G. Fahlman
Publikováno v:
Science. 313:936-940
NGC 6397 is the second closest globular star cluster to the Sun. Using 5 days of time on the Hubble Space Telescope, we have constructed the deepest ever color-magnitude diagram for this cluster. We see a clear truncation in each of its two major ste
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a25383d71d33d6ea6fc25b26ec76eb8
https://doi.org/10.1126/science.1130691
https://doi.org/10.1126/science.1130691
Publikováno v:
The Astrophysical Journal. 618:L129-L132
Spectra have been obtained of 21 white dwarfs (WDs) in the direction of the young, rich open star cluster NGC 2099. This represents an appreciable fraction (>30%) of the cluster's total WD population. The mean derived mass of the sample is 0.8 Msun -
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eefb00e7dcd83e0e7bc835ce34c89682
https://doi.org/10.1086/427551
https://doi.org/10.1086/427551
Autor:
James Brewer, Rodrigo A. Ibata, Jasonjot S. Kalirai, Peter B. Stetson, Brad K. Gibson, Brad M. S. Hansen, Harvey B. Richer, Michael M. Shara, S. Davis, Greg Fahlman, R. M. Rich
Publikováno v:
The Astronomical Journal. 127:2771-2792
We present new results from a photometric study of the main-sequence stars in M4 (NGC 6121=C1620-264), the closest globular cluster to the Sun. Multifield, multiepoch observations at approximately 1, 2, and 6 core radii were obtained with WFPC2 on th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dfb7bb14c6c90233d86668d790184c3a
https://doi.org/10.1086/383543
https://doi.org/10.1086/383543
Autor:
James Brewer, G. G. Fahlman, Peter B. Stetson, Harvey B. Richer, R. Michael Rich, Robert D. Ferdman, Jason F. Rowe, Rodrigo A. Ibata, Brad K. Gibson, Brad M. S. Hansen, Jaymie M. Matthews, Jasonjot S. Kalirai, Mark E. Huber, Michael M. Shara
Publikováno v:
The Astronomical Journal. 127:380-393
Time-series data taken with the Hubble Space Telescope of a field six core radii (~5') from the center of the globular cluster Messier 4, and covering a period of about 10 weeks in early 2001, have been analyzed in search of variable objects. Various
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bccc7e9e3c724701a31916c45c709b10
https://doi.org/10.1086/380219
https://doi.org/10.1086/380219