Zobrazeno 1 - 10
of 5 024
pro vyhledávání: '"Geha AS"'
The fraction of dwarf galaxies hosting central, intermediate-mass black holes (IMBHs) at low redshifts is an important observational probe of black hole seeding at high redshift. Detections of nuclear accretion signatures in dwarf galaxies provides s
Externí odkaz:
http://arxiv.org/abs/2410.11177
Autor:
Cerny, W., Chiti, A., Geha, M., Mutlu-Pakdil, B., Drlica-Wagner, A., Tan, C. Y., Adamów, M., Pace, A. B., Simon, J. D., Sand, D. J., Ji, A. P., Li, T. S., Vivas, A. K., Bell, E. F., Carlin, J. L., Carballo-Bello, J. A., Chaturvedi, A., Choi, Y., Doliva-Dolinsky, A., Gnedin, O. Y., Limberg, G., Martínez-Vázquez, C. E., Mau, S., Medina, G. E., Navabi, M., Noël, N. E. D., Placco, V. M., Riley, A. H., Roederer, I. U., Stringfellow, G. S., Bom, C. R., Ferguson, P. S., James, D. J., Martínez-Delgado, D., Massana, P., Nidever, D. L., Sakowska, J. D., Santana-Silva, L., Sherman, N. F., Tollerud, E. J.
We present the discovery of Aquarius III, an ultra-faint Milky Way satellite galaxy identified in the second data release of the DECam Local Volume Exploration (DELVE) survey. Based on deeper follow-up imaging with DECam, we find that Aquarius III is
Externí odkaz:
http://arxiv.org/abs/2410.00981
Autor:
Kado-Fong, Erin, Geha, Marla, Mao, Yao-Yuan, Reyes, Mithi A. C. de los, Wechsler, Risa H., Weiner, Benjamin, Asali, Yasmeen, Kallivayalil, Nitya, Nadler, Ethan O., Tollerud, Erik J., Wang, Yunchong
The redshift-dependent relation between galaxy stellar mass and star formation rate (the Star-Forming Sequence, or SFS) is a key observational yardstick for galaxy assembly. We use the SAGAbg-A sample of background galaxies from the Satellites Around
Externí odkaz:
http://arxiv.org/abs/2409.12221
Autor:
Reyes, Mithi A. C. de los, Asali, Yasmeen, Wechsler, Risa, Geha, Marla, Mao, Yao-Yuan, Kado-Fong, Erin, Pucha, Ragadeepika, Grant, William, Gandhi, Pratik J., Manwadkar, Viraj, Engelhardt, Anna, Munshi, Ferah, Wang, Yunchong
The stellar masses of galaxies are measured using integrated light via several methods -- however, few of these methods were designed for low-mass ($M_{\star}\lesssim10^{8}\rm{M_{\odot}}$) "dwarf" galaxies, whose properties (e.g., stochastic star for
Externí odkaz:
http://arxiv.org/abs/2409.03959
Autor:
Tan, C. Y., Cerny, W., Drlica-Wagner, A., Pace, A. B., Geha, M., Ji, A. P., Li, T. S., Adamów, M., Anbajagane, D., Bom, C. R., Carballo-Bello, J. A., Carlin, J. L., Chang, C., Choi, Y., Collins, M. L. M., Doliva-Dolinsky, A., Ferguson, P. S., Gruendl, R. A., James, D. J., Limberg, G., Navabi, M., Martínez-Delgado, D., Martínez-Vázquez, C. E., Medina, G. E., Mutlu-Pakdil, B., Nidever, D. L., Noël, N. E. D., Riley, A. H., Sakowska, J. D., Sand, D. J., Sharp, J., Stringfellow, G. S., Tolley, C., Vivas, A. K.
We report the discovery and spectroscopic confirmation of an ultra-faint Milky Way (MW) satellite in the constellation of Leo. This system was discovered as a spatial overdensity of resolved stars observed with Dark Energy Camera (DECam) data from an
Externí odkaz:
http://arxiv.org/abs/2408.00865
Autor:
Savino, A., Gennaro, M., Dolphin, A. E., Weisz, D. R., Correnti, M., Anderson, J., Beaton, R., Boyer, M. L., Cohen, R. E., Cole, A. A., Durbin, M. J., Garling, C. T., Geha, M. C., Gilbert, K. M., Kalirai, J., Kallivayalil, N., McQuinn, K. B. W., Newman, M. J. B., Richstein, H., Skillman, E. D., Warfield, J. T., Williams, B. F.
We empirically assess estimates from v3.0 of the JWST NIRCam Exposure Time Calculator (ETC) using observations of resolved stars in Local Group targets taken as part of the Resolved Stellar Populations Early Release Science (ERS) Program. For bright
Externí odkaz:
http://arxiv.org/abs/2405.17547
Autor:
Wang, Yunchong, Nadler, Ethan O., Mao, Yao-Yuan, Wechsler, Risa H., Abel, Tom, Behroozi, Peter, Geha, Marla, Asali, Yasmeen, Reyes, Mithi A. C. de los, Kado-Fong, Erin, Kallivayalil, Nitya, Tollerud, Erik J., Weiner, Benjamin, Wu, John F.
Environment plays a critical role in shaping the assembly of low-mass galaxies. Here, we use the UniverseMachine (UM) galaxy-halo connection framework and the Data Release 3 of the Satellites Around Galactic Analogs (SAGA) Survey to place dwarf galax
Externí odkaz:
http://arxiv.org/abs/2404.14500
Autor:
Geha, Marla, Mao, Yao-Yuan, Wechsler, Risa H., Asali, Yasmeen, Kado-Fong, Erin, Kallivayalil, Nitya, Nadler, Ethan O., Tollerud, Erik J., Weiner, Benjamin, Reyes, Mithi A. C. de los, Wang, Yunchong, Wu, John F.
Publikováno v:
Astrophysical Journal 976 (2024) 118
We present the star-forming properties of 378 satellite galaxies around 101 Milky Way analogs in the Satellites Around Galactic Analogs (SAGA) Survey, focusing on the environmental processes that suppress or quench star formation. In the SAGA stellar
Externí odkaz:
http://arxiv.org/abs/2404.14499
Autor:
Mao, Yao-Yuan, Geha, Marla, Wechsler, Risa H., Asali, Yasmeen, Wang, Yunchong, Kado-Fong, Erin, Kallivayalil, Nitya, Nadler, Ethan O., Tollerud, Erik J., Weiner, Benjamin, Reyes, Mithi A. C. de los, Wu, John F.
Publikováno v:
Astrophysical Journal 976 (2024) 117
We present Data Release 3 (DR3) of the Satellites Around Galactic Analogs (SAGA) Survey, a spectroscopic survey characterizing satellite galaxies around Milky Way (MW)-mass galaxies. The SAGA Survey DR3 includes 378 satellites identified across 101 M
Externí odkaz:
http://arxiv.org/abs/2404.14498
Autor:
Ou, Xiaowei, Chiti, Anirudh, Shipp, Nora, Simon, Joshua D., Geha, Marla, Frebel, Anna, Mardini, Mohammad K., Erkal, Denis, Necib, Lina
The Hercules ultra-faint dwarf galaxy (UFD) has long been hypothesized to be tidally disrupting, yet no conclusive evidence has been found for tidal disruption owing partly to difficulties in identifying Hercules member stars. In this work, we presen
Externí odkaz:
http://arxiv.org/abs/2403.00921