Zobrazeno 1 - 10
of 41
pro vyhledávání: '"William A. Clarkson"'
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:
Yuankun Wang, Eric C. Bellm, Allison Crossland, William I. Clarkson, Alessandro Mazzi, Reed Riddle, Russ R. Laher, Ben Rusholme
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 1, p 91 (2024)
Transient low-mass X-ray binaries (LMXBs) are discovered largely by X-ray and gamma-ray all-sky monitors. The X-ray outburst is also accompanied by an optical brightening, which empirically can precede the detection of X-rays. Newly sensitive optical
Externí odkaz:
https://doaj.org/article/1166d33511ed4a9ba8d8c585131477e1
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:
Chin-Ping Hu, Kristen C Dage, William I Clarkson, McKinley Brumback, Philip A Charles, Daryl Haggard, Ryan C Hickox, Tatehiro Mihara, Arash Bahramian, Rawan Karam, Wasundara Athukoralalage, Diego Altamirano, Joey Neilsen, Jamie Kennea
SMC X-1 is a high-mass X-ray binary showing superorbital modulation with an unstable period. Previous monitoring shows three excursion events in 1996--1998, 2005--2007, and 2014--2016. The superorbital period drifts from >60 days to
7 pages, 3 f
7 pages, 3 f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42c5da1c62fa7e9b658b4b49ba990dee
Autor:
Melissa L Graham, Robert A Knop, Thomas D Kennedy, Peter E Nugent, Eric Bellm, Márcio Catelan, Avi Patel, Hayden Smotherman, Monika Soraisam, Steven Stetzler, Lauren N Aldoroty, Autumn Awbrey, Karina Baeza-Villagra, Pedro H Bernardinelli, Federica Bianco, Dillon Brout, Riley Clarke, William I Clarkson, Thomas Collett, James R A Davenport, Shenming Fu, John E Gizis, Ari Heinze, Lei Hu, Saurabh W Jha, Mario Jurić, J Bryce Kalmbach, Alex Kim, Chien-Hsiu Lee, Chris Lidman, Mark Magee, Clara E Martínez-Vázquez, Thomas Matheson, Gautham Narayan, Antonella Palmese, Christopher A Phillips, Markus Rabus, Armin Rest, Nicolás Rodríguez-Segovia, Rachel Street, A Katherina Vivas, Lifan Wang, Nicholas Wolf, Jiawen Yang
This paper presents a new optical imaging survey of four deep drilling fields (DDFs), two Galactic and two extragalactic, with the Dark Energy Camera (DECam) on the 4 meter Blanco telescope at the Cerro Tololo Inter-American Observatory (CTIO). Durin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77612b91d367aed9eef4c76aa0d6ac02
http://arxiv.org/abs/2211.09202
http://arxiv.org/abs/2211.09202
Autor:
Kristen C Dage, McKinley Brumback, Joey Neilsen, Chin-Ping Hu, Diego Altamirano, Arash Bahramian, Philip A Charles, William I Clarkson, Daryl Haggard, Ryan C Hickox, Jamie Kennea
SMC X-1 has exhibited three super-orbital period excursions since the onset of X-ray monitoring beginning with RXTE's launch in 1995. NICER has recently probed a fourth observed excursion beginning in 2021 with our program Monitoring Observations of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::731f73da45e9d4e12beade67ce59b50c
https://resolver.caltech.edu/CaltechAUTHORS:20220801-490192000
https://resolver.caltech.edu/CaltechAUTHORS:20220801-490192000
Autor:
Emilia Barbisan, Jeff Huang, Kristen C Dage, Daryl Haggard, Robin Arnason, Arash Bahramian, William I Clarkson, Arunav Kundu, Stephen E Zepf
Globular clusters (GCs) have been at the heart of many longstanding questions in many sub-fields of astronomy and, as such, systematic identification of GCs in external galaxies has immense impacts. In this study, we take advantage of M87's well-stud
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99848ce291977b0c92e0cb33a286617e
http://arxiv.org/abs/2205.09280
http://arxiv.org/abs/2205.09280
Autor:
William A Clarkson, Jacob L Barber, Bridget Armstrong, Yuan Wang, Fiona C McGillicuddy, Suzanne Saldanha, Oludamilola Akinmolayemi, Ian J Neeland, Anand Rohatgi, Mark A Sarzynski
Publikováno v:
Circulation. 145
Introduction: While high-density lipoprotein (HDL) cholesterol is a component of metabolic syndrome, an ASCVD risk factor, other markers of HDL metabolism better associate with ASCVD. However, it is unclear whether these markers better discriminate b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::83f8b97d0caa12e55fa8c349e65481c7
https://doi.org/10.1161/circ.145.suppl_1.p175
https://doi.org/10.1161/circ.145.suppl_1.p175
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