Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Iulia T Simion"'
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
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
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:
Michael D. Young, Christian Johnson, Catherine A. Pilachowski, Chul Chung, Scott Michael, Will Clarkson, Andrea Kunder, R. Michael Rich, Iulia T. Simion, A. Katherina Vivas, Dongwook Lim, A. J. Koch-Hansen
Red clump (RC) stars are one of the best stellar tracers of the structure of the Milky Way (MW) bulge. Here we report a new view of the double RC through luminosity and color distributions of RC stars in nine bulge fields ($l$ = 0.0$^{\circ}$, $\pm$4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7188f9221daa15e27a4cb95977ec76ca
http://arxiv.org/abs/2101.06269
http://arxiv.org/abs/2101.06269
Autor:
Iulia T. Simion, Melissa Ness, Sergey E. Koposov, Jonathan Bland-Hawthorn, Geraint F. Lewis, Kenneth C. Freeman, Juntai Shen
Publikováno v:
Simion, I T, Shen, J, Koposov, S E, Ness, M, Freeman, K, Bland-Hawthorn, J & Lewis, G F 2021, ' Mapping the tilt of the Milky Way bulge velocity ellipsoids with ARGOS and Gaia DR2 ', Monthly Notices of the Royal Astronomical Society, vol. 502, no. 2, pp. 1740-1752 . https://doi.org/10.1093/mnras/stab073
Until the recent advent of $Gaia$ Data Release 2 (DR2) and deep multi-object spectroscopy, it has been difficult to obtain 6-D phase space information for large numbers of stars beyond 4 kpc, in particular towards the Galactic centre, where dust and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::938114edd2b9eb5fd1c2b2f8b2885cf9
http://arxiv.org/abs/2011.13905
http://arxiv.org/abs/2011.13905
Autor:
M. Soto, Christian Johnson, Andreas Koch, R. Michael Rich, Iulia T. Simion, A. Katherina Vivas, Will Clarkson, Annie C. Robin, Michael D. Young, Michelle L. M. Collins, Rodrigo A. Ibata, Nicolas F. Martin, Roberto De Propris, Željko Ivezić, Scott Michael, Catherine A. Pilachowski, Nadège Lagarde, Juntai Shen, A. Kunder, Ortwin Gerhard, Tommaso Marchetti
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 499 (2), pp.2340-2356. ⟨10.1093/mnras/staa2426⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 499 (2), pp.2340-2356. ⟨10.1093/mnras/staa2426⟩
The Blanco Dark Energy Camera (DECam) Bulge survey is a Vera Rubin Observatory (LSST) pathfinder imaging survey, spanning $\sim 200$ sq. deg. of the Southern Galactic bulge, $-2^\circ
Comment: 19 pages, 13 figures; MNRAS in press; revision corre
Comment: 19 pages, 13 figures; MNRAS in press; revision corre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e7f3c3b5c091491bc5fb8b4e99ff81a
https://surrey.eprints-hosting.org/858493/
https://surrey.eprints-hosting.org/858493/
Autor:
Andrea Kunder, A. K. Vivas, Catherine A. Pilachowski, Will Clarkson, Scott Michael, Christian Johnson, Andreas Koch, Iulia T. Simion, Michael D. Young, R. M. Rich
The Blanco DECam Bulge Survey (BDBS) imaged more than 200 square degrees of the Southern Galactic bulge using the ugrizY filters of the Dark Energy Camera, and produced point spread function photometry of approximately 250 million unique sources. In
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14554d765d467369be30f2e476e49bc2