Zobrazeno 1 - 10
of 401
pro vyhledávání: '"Kirby, Evan"'
Autor:
Simon, Joshua D., Li, Ting S., Ji, Alexander P., Pace, Andrew B., Hansen, Terese T., Cerny, William, Escala, Ivanna, Koposov, Sergey E., Drlica-Wagner, Alex, Mau, Sidney, Kirby, Evan N.
We present spectroscopy of the ultra-faint Milky Way satellites Eridanus III (Eri III) and DELVE 1. We identify eight member stars in each satellite and place non-constraining upper limits on their velocity and metallicity dispersions. The brightest
Externí odkaz:
http://arxiv.org/abs/2410.08276
Autor:
Nunez, Evan Haze, Steidel, Charles C., Kirby, Evan N., Rudie, Gwen C., Prusinski, Nikolaus Z., Chen, Yuguang, Zhuang, Zhuyun, Strom, Allison L., Erb, Dawn K., Pettini, Max, Welsh, Louise, Rupke, Dave S. N., Cooke, Ryan J.
We present the design and first results of the Inner Circumgalactic Medium (CGM) of QSO Line of Sight Emitting galaxies at $z\sim 2-3$, KBSS-InCLOSE. The survey will connect galaxy properties (e.g., stellar mass $M_*$, interstellar medium ISM metalli
Externí odkaz:
http://arxiv.org/abs/2408.14647
Autor:
Huber, Daniel, Slumstrup, Ditte, Hon, Marc, Li, Yaguang, Borsen-Koch, Victor Aguirre, Bedding, Timothy R., Joyce, Meridith, Ong, J. M. Joel, Serenelli, Aldo, Stello, Dennis, Berger, Travis, Grunblatt, Samuel K., Greklek-McKeon, Michael, Hirano, Teruyuki, Kirby, Evan N., Pinsonneault, Marc H., Puls, Arthur Alencastro, Zinn, Joel
Very metal-poor stars ([Fe/H]<-2) are important laboratories for testing stellar models and reconstructing the formation history of our galaxy. Asteroseismology is a powerful tool to probe stellar interiors and measure ages, but few asteroseismic det
Externí odkaz:
http://arxiv.org/abs/2407.17566
Autor:
Dobos, László, Szalay, Alexander S., Budavári, Tamás, Kirby, Evan N., Lupton, Robert H., Wyse, Rosemary F. G.
Massively multiplexed spectrographs will soon gather large statistical samples of stellar spectra. The accurate estimation of uncertainties on derived parameters, such as line-of-sight velocity $v_\mathrm{los}$, especially for spectra with low signal
Externí odkaz:
http://arxiv.org/abs/2407.14943
Autor:
Ogami, Itsuki, Komiyama, Yutaka, Chiba, Masashi, Tanaka, Mikito, Guhathakurta, Puragra, Kirby, Evan N., Wyse, Rosemary F. G., Filion, Carrie, Kirihara, Takanobu, Ishigaki, Miho N., Hayashi, Kohei
We report the detection of a dwarf satellite candidate (Triangulum IV: Tri IV) of the Triangulum galaxy (M33) using the deep imaging of Subaru/Hyper Suprime-Cam (HSC). From the apparent magnitude of the horizontal branch in Tri IV, the heliocentric d
Externí odkaz:
http://arxiv.org/abs/2407.07481
Autor:
Zhuang, Zhuyun, Kirby, Evan N., Steidel, Charles C., Reyes, Mithi A. C. de los, Prusinski, Nikolaus Z., Leethochawalit, N., Park, Minjung, Conroy, Charlie, Nuñez, Evan H.
Understanding the chemical enrichment of different elements is crucial to gaining a complete picture of galaxy chemical evolution. In this study, we present a new sample of 46 low-redshift, low-mass star-forming galaxies at $M_*\sim 10^{8-10}M_{\odot
Externí odkaz:
http://arxiv.org/abs/2407.04782
Autor:
Cullinane, L. R., Gilbert, Karoline M., Escala, Ivanna, Wojno, J. Leigh, Kirby, Evan N., Kvasova, Kateryna A., Tollerud, Erik, Collins, Michelle L. M., Rich, R. Michael
With a luminosity similar to that of Milky Way dwarf spheroidal (dSph) systems like Sextans, but a spatial extent similar to that of ultradiffuse galaxies (UDGs), Andromeda (And) XIX is an unusual satellite of M31. To investigate the origin of this g
Externí odkaz:
http://arxiv.org/abs/2407.04349
Autor:
Hirai, Yutaka, Kirby, Evan N., Chiba, Masashi, Hayashi, Kohei, Anguiano, Borja, Saitoh, Takayuki R., Ishigaki, Miho N., Beers, Timothy C.
The chemical abundances of Milky Way's satellites reflect their star formation histories (SFHs), yet, due to the difficulty of determining the ages of old stars, the SFHs of most satellites are poorly measured. Ongoing and upcoming surveys will obtai
Externí odkaz:
http://arxiv.org/abs/2405.05330
The discovery of a star formed out of pair-instability supernova ejecta would have massive implications for the Population III star initial mass function and the existence of stars over 100 Msun, but none have yet been found. Recently, the star LAMOS
Externí odkaz:
http://arxiv.org/abs/2404.17078
Andromeda XVIII is an isolated dwarf galaxy 579 kpc away from the nearest large galaxy, M31. It is a candidate "backsplash galaxy" that might have been affected by a close passage to M31. We present new Keck/DEIMOS spectroscopy of Andromeda XVIII to
Externí odkaz:
http://arxiv.org/abs/2404.11804