Zobrazeno 1 - 10
of 374
pro vyhledávání: '"KOPOSOV, SERGEY E."'
Autor:
Byström, Amanda, Koposov, Sergey E., Lilleengen, Sophia, Li, Ting S., Bell, Eric, Silva, Leandro Beraldo e, Carrillo, Andreia, Chandra, Vedant, Gnedin, Oleg Y., Han, Jiwon Jesse, Medina, Gustavo E., Najita, Joan, Riley, Alexander H., Thomas, Guillaume, Valluri, Monica, Aguilar, Jessica N., Ahlen, Steven, Prieto, Carlos Allende, Brooks, David, Claybaugh, Todd, Cole, Shaun, Dawson, Kyle, de la Macorra, Axel, Font-Ribera, Andreu, Forero-Romero, Jaime E., Gaztañaga, Enrique, Gontcho, Satya Gontcho A, Kremin, Anthony, Lambert, Andrew, Landriau, Martin, Guillou, Laurent Le, Levi, Michael E., Meisner, Aaron, Miquel, Ramon, Moustakas, John, Prada, Francisco, Pérez-Ràfols, Ignasi, Rossi, Graziano, Sanchez, Eusebio, Schlegel, David, Schubnell, Michael, Sprayberry, David, Tarlé, Gregory, Weaver, Benjamin A., Zou, Hu
The Large Magellanic Cloud (LMC) is a Milky Way (MW) satellite that is massive enough to gravitationally attract the MW disc and inner halo, causing significant motion of the inner MW with respect to the outer halo. In this work, we probe this intera
Externí odkaz:
http://arxiv.org/abs/2410.09149
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:
Zhou, Rongpu, Guy, Julien, Koposov, Sergey E., Schlafly, Edward F., Schlegel, David, Aguilar, Jessica, Ahlen, Steven, Bailey, Stephen, Bianchi, David, Brooks, David, Chaussidon, Edmond, Claybaugh, Todd, Dawson, Kyle, de la Macorra, Axel, Dey, Biprateep, Eisenstein, Daniel J., Ferraro, Simone, Font-Ribera, Andreu, Forero-Romero, Jaime E., Gaztañaga, Enrique, Gontcho, Satya Gontcho A, Gutierrez, Gaston, Honscheid, Klaus, Juneau, Stephanie, Kehoe, Robert, Kirkby, David, Kisner, Theodore, Kremin, Anthony, Lambert, Andrew, Landriau, Martin, Guillou, Laurent Le, Levi, Michael E., Li, Ting S., Manera, Marc, Martini, Paul, Meisner, Aaron, Miquel, Ramon, Moustakas, John, Myers, Adam D., Newman, Jeffrey A., Niz, Gustavo, Palanque-Delabrouille, Nathalie, Percival, Will J., Poppett, Claire, Prada, Francisco, Raichoor, Anand, Ross, Ashley J., Rossi, Graziano, Sanchez, Eusebio, Saydjari, Andrew K., Schubnell, Michael, Sprayberry, David, Tarl, Gregory, Weaver, Benjamin A., Zarrouk, Pauline, Zou, Hu
We present new Galactic reddening maps of the high Galactic latitude sky using DESI imaging and spectroscopy. We directly measure the reddening of 2.6 million stars by comparing the observed stellar colors in $g-r$ and $r-z$ from DESI imaging with th
Externí odkaz:
http://arxiv.org/abs/2409.05140
Autor:
Valluri, Monica, Fagrelius, Parker, Koposov, Sergey. E., Li, Ting S., Gnedin, Oleg Y., Bell, Eric F., Carlberg, Raymond G., Cooper, Andrew P., Aguilar, Jessia N., Prieto, Carlos Allende, Belokurov, Vasily, Silva, Leandro Beraldo e, Brooks, David, Byström, Amanda, Claybaugh, Todd, Dawson, Kyle, Dey, Arjun, Doel, Peter, Forero-Romero, Jaime E., Gaztañaga, Enrique, Gontcho, Satya Gontcho A, Honscheid, Klaus, Kisner, T ., Kremin, Anthony, Lambert, A., Landriau, Martin, Guillou, L. Le, Levi, Michael E., de la Macorra, Axel, Manera, Mark, Martini, Paul, Medina, Gustavo E., Meisner, Aaron, Miquel, Ramon, Moustakas, John, Myer, Adam D., Najita, Joan, Poppett, Claire, Prada, Francisco, Rezaie, Mehdi, Rossi, Graziano, Riley, Alex H., Sanchez, Eusebio, Schlegel, David, Schubnell, Michael, Sprayberry, David, Tarlé, Gregory, Thomas, Guillaume, Weaver, Benjamin A., Wechsler, Risa H., Zhou, Rongpu, Zou, Hu
We present ~ 126 new spectroscopically identified members of the GD-1 tidal stream obtained with the 5000-fiber Dark Energy Spectroscopic Instrument (DESI). We confirm the existence of a ``cocoon'' which is broad (FWHM~2.932deg~460pc) and kinematical
Externí odkaz:
http://arxiv.org/abs/2407.06336
Autor:
Koposov, Sergey E., Allende-Prieto, C., Cooper, A. P., Li, T. S., Silva, L. Beraldo e, Kim, B., Carrillo, A., Dey, A., Manser, C. J., Nikakhtar, F., Riley, A. H., Rockosi, C., Valluri, M., Aguilar, J., Ahlen, S., Bailey, S., Blum, R., Brooks, D., Claybaugh, T., Cole, S., de la Macorra, A., Dey, B., Forero-Romero, J. E., Gaztañaga, E., Guy, J., Kremin, A., Guillou, L. Le, Levi, Michael E., Manera, M., Meisner, A., Miquel, R., Moustakas, J., Nie, J., Palanque-Delabrouille, N., Percival, W. J., Rezaie, M., Rossi, G., Sanchez, E., Schlafly, E. F., Schubnell, M., Tarlé, G., Weaver, B. A., Zhou, Z.
We present the stellar value-added catalogue based on the Dark Energy Spectroscopic Instrument (DESI) Early Data Release. The catalogue contains radial velocity and stellar parameter measurements for $\simeq$ 400,000 unique stars observed during comm
Externí odkaz:
http://arxiv.org/abs/2407.06280
Improved constraints on Galactic Centre ejection of hypervelocity stars based on novel search method
Autor:
Verberne, Sill, Rossi, Elena Maria, Koposov, Sergey E., Marchetti, Tommaso, Kuijken, Konrad, Penoyre, Zephyr, Evans, Fraser A., Souropanis, Dimitris, Tohill, Clár-Bríd
Hypervelocity stars (HVSs) are stars which have been ejected from the Galactic Centre (GC) at velocities of up to a few thousand km/s. They are tracers of the Galactic potential and can be used to infer properties of the GC, such as the initial-mass
Externí odkaz:
http://arxiv.org/abs/2406.14134
Autor:
Kizhuprakkat, Namitha, Cooper, Andrew P., Riley, Alexander H., Koposov, Sergey E., Aguilar, Jessica Nicole, Ahlen, Steven, Prieto, Carlos Allende, Brooks, David, Claybaugh, Todd, Dawson, Kyle, de la Macorra, Axel, Doel, Peter, Forero-Romero, Jaime E., Frenk, Carlos, Gaztañaga, Enrique, Gnedin, Oleg Y., Grand, Robert J. J., Gontcho, Satya Gontcho A, Honscheid, Klaus, Kehoe, Robert, Landriau, Martin, Manera, Marc, Meisner, Aaron, Miquel, Ramon, Nie, Jundan, Prada, Francisco, Rezaie, Mehdi, Rossi, Graziano, Sanchez, Eusebio, Schubnell, Michael, Seo, Hee-Jong, Tarlé, Gregory, Valluri, Monica, Zhou, Zhimin
The Dark Energy Spectroscopic Instrument Milky Way Survey (DESI MWS) will explore the assembly history of the Milky Way by characterising remnants of ancient dwarf galaxy accretion events and improving constraints on the distribution of dark matter i
Externí odkaz:
http://arxiv.org/abs/2406.08921
Publikováno v:
A&A 690, A166 (2024)
We use Legacy Survey photometric data to probe the stellar halo in multiple directions of the sky using a probabilistic methodology to identify Blue Horizontal Branch (BHB) stars. The measured average radial density profile follows a double power law
Externí odkaz:
http://arxiv.org/abs/2404.09825
Autor:
Hilmi, Tariq, Erkal, Denis, Koposov, Sergey E., Li, Ting S., Lilleengen, Sophia, Ji, Alexander P., Lewis, Geraint F., Shipp, Nora, Pace, Andrew B., Zucker, Daniel B., Limberg, Guilherme, Usman, Sam A.
In the cold dark matter paradigm, our Galaxy is predicted to contain >10000 dark matter subhaloes in the $10^5-10^8M_\odot$ range which should be completely devoid of stars. Stellar streams are sensitive to the presence of these subhaloes, which can
Externí odkaz:
http://arxiv.org/abs/2404.02953
Autor:
Manser, Christopher J., Izquierdo, Paula, Gänsicke, Boris T., Swan, Andrew, Koester, Detlev, Robert, Akshay, Xu, Siyi, Inight, Keith, Amroota, Ben, Fusillo, N. P. Gentile, Koposov, Sergey E., Kim, Bokyoung, Dey, Arjun, Prieto, Carlos Allende, Aguilar, J., Ahlen, S., Blum, R., Brooks, D., Claybaugh, T., Cooper, A. P., Dawson, K., de la Macorra, A., Doel, P., Forero-Romero, J. E., Gaztañaga, E., Gontcho, S. Gontcho A, Honscheid, K., Kisner, T., Kremin, A., Lambert, A., Landriau, M., Guillou, L. Le, Levi, Michael E., Li, T. S., Meisner, A., Miquel, R., Moustakas, J., Nie, J., Palanque-Delabrouille, N., Percival, W. J., Poppett, C., Prada, F., Rezaie, M., Rossi, G., Sanchez, E., Schlafly, E. F., Schlegel, D., Schubnell, M., Seo, H., Silber, J., Tarlé, G., Weaver, B. A., Zhou, Z., Zou, H.
The Early Data Release (EDR) of the Dark Energy Spectroscopic Instrument (DESI) comprises spectroscopy obtained from 2020 December 14 to 2021 June 10. White dwarfs were targeted by DESI both as calibration sources and as science targets and were sele
Externí odkaz:
http://arxiv.org/abs/2402.18641