Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Andreas J. Koch-Hansen"'
Autor:
Evan Butler, Andrea Kunder, Zdenek Prudil, Kevin R. Covey, Macy Ball, Carlos Campos, Kaylen Gollnick, Julio Olivares Carvajal, Joanne Hughes, Kathryn Devine, Christian I. Johnson, A. Katherina Vivas, R. Michael Rich, Meridith Joyce, Iulia T. Simion, Tommaso Marchetti, Andreas J. Koch-Hansen, William I. Clarkson, Rebekah Kuss
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 1, p L33 (2024)
Patchick 99 is a candidate globular cluster located in the direction of the Galactic bulge, with a proper motion almost identical to the field and extreme field star contamination. A recent analysis suggests it is a low-luminosity globular cluster wi
Externí odkaz:
https://doaj.org/article/79909a585b8244678aad812edb9bd4b0
Autor:
Andrea Kunder, Zdenek Prudil, Kevin R. Covey, Joanne Hughes, Meridith Joyce, Iulia T. Simion, Rebekah Kuss, Carlos Campos, Christian I. Johnson, Catherine A. Pilachowski, Kristen A. Larson, Andreas J. Koch-Hansen, Tommaso Marchetti, Michael R. Rich, Evan Butler, William I. Clarkson, Michael Rivet, Kathryn Devine, A. Katherina Vivas, Gabriel I. Perren, Mario Soto, Erika Silva
Publikováno v:
The Astronomical Journal, Vol 167, Iss 1, p 21 (2023)
The Milky Way Bulge extra-tidal star survey is a spectroscopic survey with the goal of identifying stripped globular cluster stars from inner Galaxy clusters. In this way, an indication of the fraction of metal-poor bulge stars that originated from g
Externí odkaz:
https://doaj.org/article/bd7576781348448f979e8e46a6dac052
Publikováno v:
The Astronomical Journal, Vol 167, Iss 1, p 3 (2023)
Wide binaries, with separations between the two stars from a few au to more than several thousand au, are valuable objects for various research topics in Galactic astronomy. As the number of newly reported wide binaries continues to increase, studyin
Externí odkaz:
https://doaj.org/article/928d58701e0b49ccb0be15ec9c88aa5d
Autor:
Justin A. Kader, Catherine A. Pilachowski, Christian I. Johnson, R. Michael Rich, Michael D. Young, Iulia T. Simion, William I. Clarkson, Scott Michael, Andrea Kunder, Anna Katherina Vivas, Andreas J. Koch-Hansen, Tommaso Marchetti
Publikováno v:
The Astrophysical Journal, Vol 950, Iss 2, p 126 (2023)
We present wide-field, high resolution maps of the color excess for 14 globular clusters toward the Southern Galactic bulge. The maps were derived using Gaia EDR3 astrometry and stellar photometry from the Blanco DECam Bulge Survey, which is a deep,
Externí odkaz:
https://doaj.org/article/0ce71fe3216b464295b70f15dc46212a
Autor:
Tommaso Marchetti, Christian I. Johnson, Meridith Joyce, R.Michael Rich, Iulia T. Simion, Michael D. Young, William Clarkson, Catherine A. Pilachowski, Scott Michael, Andrea Kunder, Andreas J. Koch-Hansen
The Blanco DECam Bulge Survey (BDBS) has imaged more than 200 square degrees of the southern Galactic bulge, providing photometry in the ugrizy filters for $\sim 250$ million unique stars. The presence of a strong foreground disk population, along wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f94019f50283b193e7f741a47df0b1e8
http://arxiv.org/abs/2206.12817
http://arxiv.org/abs/2206.12817
Autor:
Christian I Johnson, R Michael Rich, Iulia T Simion, Michael D Young, William I Clarkson, Catherine A Pilachowski, Scott Michael, Tommaso Marchetti, Mario Soto, Andrea Kunder, Andreas J Koch-Hansen, A Katherina Vivas, Meridith Joyce, Juntai Shen, Alexis Osmond
We present photometric metallicity measurements for a sample of 2.6 million bulge red clump stars extracted from the Blanco DECam Bulge Survey (BDBS). Similar to previous studies, we find that the bulge exhibits a strong vertical metallicity gradient
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce9017f00de360fc85909dbb4b538903
Globular clusters (GCs) play an important role in the formation and evolution of the Milky Way. New candidates are continuously found, particularly in the high-extinction low-latitude regions of the bulge, although their existence and properties have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7569e090a424c66c50b520142316ece3
Autor:
Justin A. Kader, Catherine A. Pilachowski, Christian I. Johnson, R. Michael Rich, Michael D. Young, Iulia T. Simion, William I. Clarkson, Scott Michael, Andrea Kunder, Anna Katherina Vivas, Andreas J. Koch-Hansen, Tommaso Marchetti
Publikováno v:
The Astrophysical Journal. 940:76
We present photometric evidence for multiple stellar populations (MPs) in 14 globular clusters (GCs) toward the southern Galactic bulge. The photometric data come as part of the Blanco DECam Bulge Survey, which is a deep, wide-field near-UV-near-IR (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3a3b5e136b4d5e0614fece8ba8271d8
https://doi.org/10.3847/1538-4357/ac94c5
https://doi.org/10.3847/1538-4357/ac94c5
Autor:
Linda Lombardo, Piercarlo Bonifacio, Patrick François, Camilla J. Hansen, Elisabetta Caffau, Michael Hanke, Ása Skúladóttir, Almudena Arcones, Marius Eichler, Moritz Reichert, Athanasios Psaltis, Andreas J. Koch Hansen, Luca Sbordone
Publikováno v:
Astronomy & Astrophysics. 665:A10
Aims. The Chemical Evolution of R-process Elements in Stars (CERES) project aims to provide a homogeneous analysis of a sample of metal-poor stars ([Fe/H] < –1.5). We present the stellar parameters and the chemical abundances of elements up to Zr f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d86f31b1451b9c5792758682b3c269f
https://doi.org/10.1051/0004-6361/202243932
https://doi.org/10.1051/0004-6361/202243932
Autor:
Andreas J. Koch-Hansen, Riley E. Crabb, Brianna M. Huhmann, Victor P. Debattista, Andrea Kunder
Publikováno v:
The Astronomical Journal. 162:86
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d71aa05a88be4d592d59fd34169f5077
https://doi.org/10.3847/1538-3881/ac0888
https://doi.org/10.3847/1538-3881/ac0888