Zobrazeno 1 - 10
of 609
pro vyhledávání: '"Mcconnachie, Alan"'
Autor:
Ferreira, Leonardo, Bickley, Robert W., Ellison, Sara L., Patton, David R., Byrne-Mamahit, Shoshannah, Wilkinson, Scott, Bottrell, Connor, Fabbro, Sébastien, Gwyn, Stephen D. J., McConnachie, Alan
Merging and interactions can radically transform galaxies. However, identifying these events based solely on structure is challenging as the status of observed mergers is not easily accessible. Fortunately, cosmological simulations are now able to pr
Externí odkaz:
http://arxiv.org/abs/2407.18396
Autor:
Deibert, Emily K., Langeveld, Adam B., Young, Mitchell E., Flagg, Laura, Turner, Jake D., Smith, Peter C. B., de Mooij, Ernst J. W., Jayawardhana, Ray, Chiboucas, Kristin, Gamen, Roberto, Hayes, Christian R., Heo, Jeong-Eun, Jeong, Miji, Kalari, Venu, Martioli, Eder, Placco, Vinicius M., Xu, Siyi, Diaz, Ruben, Gomez-Jimenez, Manuel, Quiroz, Carlos, Ruiz-Carmona, Roque, Simpson, Chris, McConnachie, Alan W., Pazder, John, Burley, Gregory, Ireland, Michael, Waller, Fletcher, Berg, Trystyn A. M., Robertson, J. Gordon, Jones, David O., Labrie, Kathleen, Ridgway, Susan, Thomas-Osip, Joanna
With high equilibrium temperatures and tidally locked rotation, ultra-hot Jupiters (UHJs) are unique laboratories within which to probe extreme atmospheric physics and chemistry. In this paper, we present high-resolution dayside spectroscopy of the U
Externí odkaz:
http://arxiv.org/abs/2407.11281
Autor:
Zhang, Ziwen, Kilbinger, Martin, Peters, Fabian Hervas, Li, Qinxun, Luo, Wentao, Baumont, Lucie, Cuillandre, Jean-Charles, Fabbro, Sebastien, Gwyn, Stephen, McConnachie, Alan, Wittje, Anna
Aims:Calibrating the point spread function (PSF) is a fundamental part of weak gravitational lensing analyses. Even with corrected galaxy images, imperfect calibrations can introduce biases. We propose an analytical framework for quantifying PSF-indu
Externí odkaz:
http://arxiv.org/abs/2405.03434
Autor:
Berg, Trystyn A. M., Hayes, Christian R., Cristiani, Stefano, McConnachie, Alan, Robertson, J. Gordon, Sestito, Federico, Simpson, Chris, Waller, Fletcher, Chin, Timothy, Densmore, Adam, Diaz, Ruben J., Edgar, Michael L., Lettura, Javier Fuentes, Gómez-Jiménez, Manuel, Kalari, Venu M., Lawrence, Jon, Margheim, Steven, Pazder, John, Ruiz-Carmona, Roque, Salinas, Ricardo, Silva, Karleyne M. G., Silversides, Katherine, Venn, Kim A.
The Gemini High-resolution Optical SpecTrograph (GHOST) is a new echelle spectrograph available on the Gemini-South telescope as of Semester 2024A. We present the first high resolution spectrum of the quasar J1449-1227 (redshift z_em=3.27) using data
Externí odkaz:
http://arxiv.org/abs/2404.10058
Autor:
Smith, Simon E. T., Cerny, William, Hayes, Christian R., Sestito, Federico, Jensen, Jaclyn, McConnachie, Alan W., Geha, Marla, Navarro, Julio, Li, Ting S., Cuillandre, Jean-Charles, Errani, Raphaël, Chambers, Ken, Gwyn, Stephen, Hammer, Francois, Hudson, Michael J., Magnier, Eugene, Martin, Nicolas
We present the discovery of Ursa Major III/UNIONS 1, the least luminous known satellite of the Milky Way, which is estimated to have an absolute V-band magnitude of $+2.2^{+0.4}_{-0.3}$ mag, equivalent to a total stellar mass of 16$^{+6}_{-5}$ M$_{\o
Externí odkaz:
http://arxiv.org/abs/2311.10147
Publikováno v:
ApJ 965 (2024) 20
The recently discovered stellar system Ursa Major III/UNIONS 1 (UMa3/U1) is the faintest known Milky Way satellite to date. With a stellar mass of $16^{+6}_{-5}\,\rm M_\odot$ and a half-light radius of $3\pm1$pc, it is either the darkest galaxy ever
Externí odkaz:
http://arxiv.org/abs/2311.10134
Autor:
Placco, Vinicius M., Almeida-Fernandes, Felipe, Holmbeck, Erika M., Roederer, Ian U., Mardini, Mohammad K., Hayes, Christian R., Venn, Kim, Chiboucas, Kristin, Deibert, Emily, Gamen, Roberto, Heo, Jeong-Eun, Jeong, Miji, Kalari, Venu, Martioli, Eder, Xu, Siyi, Diaz, Ruben, Gomez-Jimenez, Manuel, Henderson, David, Prado, Pablo, Quiroz, Carlos, Ruiz-Carmona, Roque, Simpson, Chris, Urrutia, Cristian, McConnachie, Alan W., Pazder, John, Burley, Gregory, Ireland, Michael, Waller, Fletcher, Berg, Trystyn A. M., Robertson, J. Gordon, Hartman, Zachary, Jones, David O., Labrie, Kathleen, Perez, Gabriel, Ridgway, Susan, Thomas-Osip, Joanna
We report on the chemo-dynamical analysis of SPLUS J142445.34-254247.1, an extremely metal-poor halo star enhanced in elements formed by the rapid neutron-capture process. This star was first selected as a metal-poor candidate from its narrow-band S-
Externí odkaz:
http://arxiv.org/abs/2310.17024
Autor:
Dovgal, Anya, Venn, Kim A., Sestito, Federico, Hayes, Christian R., McConnachie, Alan W., Navarro, Julio F., Placco, Vinicius M., Starkenburg, Else, Martin, Nicolas F., Pazder, John S., Chiboucas, Kristin, Deibert, Emily, Gamen, Roberto, Heo, Jeong-Eun, Kalari, Venu M., Martioli, Eder, Xu, Siyi, Diaz, Ruben, Gomez-Jiminez, Manuel, Henderson, David, Prado, Pablo, Quiroz, Carlos, Robertson, J. Gordon, Ruiz-Carmona, Roque, Simpson, Chris, Urrutia, Cristian, Waller, Fletcher, Berg, Trsytyn, Burley, Gregory, Hartman, Zachary, Ireland, Michael, Margheim, Steve, Perez, Gabriel, Thomas-Osip, Joanna
Publikováno v:
MNRAS 527 (2024) 7810-7824
Pristine_183.6849+04.8619 (P1836849) is an extremely metal-poor ([Fe/H]$=-3.3\pm0.1$) star on a prograde orbit confined to the Galactic disk. Such stars are rare and may have their origins in protogalactic fragments that formed the early Milky Way, i
Externí odkaz:
http://arxiv.org/abs/2310.03075
The Local Group (LG) of galaxies is dominated by the M31 and Milky Way (MW) pair, a configuration which suggests that the mass distribution in the LG and its surroundings should be highly anisotropic. We use the APOSTLE cosmological simulations to ex
Externí odkaz:
http://arxiv.org/abs/2310.02464
Autor:
Jensen, Jaclyn, Hayes, Christian R., Sestito, Federico, McConnachie, Alan W., Waller, Fletcher, Smith, Simon E. T., Navarro, Julio, Venn, Kim A.
Dwarf galaxies are valuable laboratories for dynamical studies related to dark matter and galaxy evolution, yet it is currently unknown just how physically extended their stellar components are. Satellites orbiting the Galaxy's potential may undergo
Externí odkaz:
http://arxiv.org/abs/2308.07394