Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Annalisa Calamida"'
Autor:
Tim Axelrod, Abhijit Saha, Thomas Matheson, Edward W. Olszewski, Ralph C. Bohlin, Annalisa Calamida, Jenna Claver, Susana Deustua, Jay B. Holberg, Ivan Hubeny, John W. Mackenty, Konstantin Malanchev, Gautham Narayan, Sean Points, Armin Rest, Elena Sabbi, Christopher W. Stubbs
Publikováno v:
The Astrophysical Journal, Vol 951, Iss 1, p 78 (2023)
Hot DA white dwarfs (DAWDs) have fully radiative pure hydrogen atmospheres that are the least complicated to model. Pulsationally stable, they are fully characterized by their effective temperature T _eff and surface gravity $\mathrm{log}\,g$ , which
Externí odkaz:
https://doaj.org/article/b6eb1350c6b34f49ba29ec75e9eed043
Autor:
Christian I. Johnson, Annalisa Calamida, Justin A. Kader, Ivan Ferraro, Catherine A. Pilachowski, Giuseppe Bono, Alessandra Mastrobuono-Battisti, Armin Rest, Alfredo Zenteno, Alice Zocchi
Publikováno v:
The Astronomical Journal, Vol 166, Iss 1, p 3 (2023)
Wide-field and deep DECam multiband photometry, combined with HST data for the core of the Galactic globular cluster NGC 2808, allowed us to study the distribution of various stellar subpopulations and stars in different evolutionary phases out to th
Externí odkaz:
https://doaj.org/article/00ed64ce05804d5ebc7b74c7b56a236c
Autor:
Rosalia O’Brien, Timothy Carleton, Rogier A. Windhorst, Rolf A. Jansen, Delondrae Carter, Scott Tompkins, Sarah Caddy, Seth H. Cohen, Haley Abate, Richard G. Arendt, Jessica Berkheimer, Annalisa Calamida, Stefano Casertano, Simon P. Driver, Connor Gelb, Zak Goisman, Norman Grogin, Daniel Henningsen, Isabela Huckabee, Scott J. Kenyon, Anton M. Koekemoer, Darby Kramer, John Mackenty, Aaron Robotham, Steven Sherman
Publikováno v:
The Astronomical Journal, Vol 165, Iss 6, p 237 (2023)
The diffuse, unresolved sky provides most of the photons that the Hubble Space Telescope (HST) receives, yet remains poorly understood. The HST Archival Legacy program SKYSURF aims to measure the 0.2–1.6 μ m sky surface brightness (sky-SB) from ov
Externí odkaz:
https://doaj.org/article/1db13dca705548aeb07dd49168af4b56
Autor:
Peter McGill, Jay Anderson, Stefano Casertano, Kailash C Sahu, Pierre Bergeron, Simon Blouin, Patrick Dufour, Leigh C Smith, N Wyn Evans, Vasily Belokurov, Richard L Smart, Andrea Bellini, Annalisa Calamida, Martin Dominik, Noé Kains, Jonas Klüter, Martin Bo Nielsen, Joachim Wambsganss
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 520:259-280
In November 2019, the nearby single, isolated DQ-type white dwarf LAWD 37 (WD 1142-645) aligned closely with a distant background source and caused an astrometric microlensing event. Leveraging astrometry from \Gaia{} and followup data from the \text
Autor:
Annalisa Calamida, Varun Bajaj, Jennifer Mack, Mariarosa Marinelli, Jennifer Medina, Aidan Pidgeon, Vera Kozhurina-Platais, Clare Shanahan, Debopam Som
We present a new photometric calibration of the WFC3-UVIS and WFC3-IR detectors based on observations collected from 2009 to 2020 for four white dwarfs, namely GRW+70~5824, GD~153, GD~71, G191B2B, and a G-type star, P330E. These calibrations include
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::463ce8076b9d5ef2dd5a3e2e5af67a6d
http://arxiv.org/abs/2205.13014
http://arxiv.org/abs/2205.13014
Autor:
Annalisa Calamida, Thomas Matheson, Edward W. Olszewski, Abhijit Saha, Tim Axelrod, Clare Shanahan, Jay Holberg, Sean Points, Gautham Narayan, Konstantin Malanchev, Ryan Ridden-Harper, Nicola Gentile-Fusillo, Roberto Raddi, Ralph Bohlin, Armin Rest, Ivan Hubeny, Susana Deustua, John Mackenty, Elena Sabbi, Christopher W. Stubbs
We verified for photometric stability a set of DA white dwarfs with Hubble Space Telescope magnitudes from the near-ultraviolet to the near-infrared and ground-based spectroscopy by using time-spaced observations from the Las Cumbres Observatory netw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff9bb4c0240bfa8118fe5f00ac2f5f3b
Predicted Trends in Milky Way Bulge Proper Motion Rotation Curves: future Prospects for HST and LSST
Autor:
Will Clarkson, Steven Gough-Kelly, Oscar A. Gonzalez, Victor P. Debattista, Annalisa Calamida, M. Gennaro, Stuart Robert Anderson, Kailash C. Sahu
We use an $N$-body+smoothed particle hydrodynamics simulation of an isolated barred galaxy to study the age dependence of bulge longitudinal proper motion ($��_l$) rotation curves. We show that close to the minor axis ($|l| \sim 0^\circ$) the rel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cc7b66417373bd111c80dbbce9b8db8a
http://arxiv.org/abs/2112.09185
http://arxiv.org/abs/2112.09185
Autor:
Marcella Marconi, A. R. Walker, E. Balbinot, Peter B. Stetson, S. Cassisi, Matteo Monelli, L. Cicuendez, Annalisa Calamida, C. E. Martínez-Vázquez, Stefania Salvadori, Giuseppina Battaglia, Massimo Dall'Ora, S. Taibi, Carme Gallart, Daniela Carollo, P. Martín-Ravelo, Edouard J. Bernard, Giuseppe Bono, A. K. Vivas, Alfredo Zenteno, Giuliana Fiorentino
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 508(1), 1064-1083. Oxford University Press
We present a detailed study of the variable star population of Eridanus II (Eri II), an ultra-faint dwarf galaxy that lies close to the Milky Way virial radius. We analyze multi-epoch $g,r,i$ ground-based data from Goodman and the Dark Energy Camera,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9c8faed73dcd43c9bbee1af04d333f2
Autor:
T. O. Husser, Stefan Dreizler, Jarle Brinchmann, Annalisa Calamida, M. Latour, Sebastian Kamann
Publikováno v:
Astronomy and Astrophysics, 653, 1-8
$\omega$ Cen is a rare example of a globular cluster where the iron abundance of the stars spans more than one order of magnitude. Many spectroscopic investigations of its red-giant- and sub-giant- branches have revealed multiple peaks in the iron ab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64812df3bbd327153107258c06f839fc
https://doi.org/10.1051/0004-6361/202141791
https://doi.org/10.1051/0004-6361/202141791
Autor:
Santi Cassisi, M. Monelli, Sijing Shen, Antonela Monachesi, Annalisa Calamida, Julio F. Navarro, Stefania Salvadori, Varun Bajaj, Giuseppina Battaglia, Michele Cignoni, T. Ruiz-Lara, C. E. Martínez-Vázquez, Monica Tosi, Lucio Mayer, C. Gallart, F. Surot, J. P. Anderson, J. R. Bermejo-Climent, Edouard J. Bernard, G. S. Strinfellow
Publikováno v:
The Astrophysical Journal, 909(2):192. IOP PUBLISHING LTD
Università di Pisa-IRIS
The Astrophysical Journal
Università di Pisa-IRIS
The Astrophysical Journal
Eridanus II (EriII) is an ultra-faint dwarf (UFD) galaxy (M_V=-7.1) located at a distance close to the Milky Way virial radius. Early shallow color-magnitude diagrams (CMD) indicated that it possibly hosted an intermediate-age or even young stellar p