Zobrazeno 1 - 10
of 3 417
pro vyhledávání: '"Freeman, K"'
Autor:
Hartke, J., Arnaboldi, M., Gerhard, O., Ennis, A. I., Pulsoni, C., Coccato, L., Cortesi, A., Freeman, K. C., Kuijken, K., Merrifield, M., Napolitano, N.
Planetary nebulae (PNe) are excellent tracers of the metal-poor haloes of nearby early-type galaxies. They are commonly used to trace spatial distribution and kinematics of the halo and intracluster light at distances of up to 100 Mpcs. The results o
Externí odkaz:
http://arxiv.org/abs/2312.02587
Recent observations of high-redshift galactic disks ($z\approx 1-3$) show a strong negative trend in the dark matter fraction $f_{DM}$ with increasing baryonic surface density. For this to be true, the inner baryons must dominate over dark matter in
Externí odkaz:
http://arxiv.org/abs/2303.05574
Autor:
Hartke, J., Arnaboldi, M., Gerhard, O., Coccato, L., Merrifield, M., Kuijken, K., Pulsoni, C., Agnello, A., Bhattacharya, S., Spiniello, C., Cortesi, A., Freeman, K. C., Napolitano, N. R., Romanowsky, A. J.
Publikováno v:
A&A 663, A12 (2022)
M105 is an early-type galaxy in the nearby Leo I group, the closest galaxy group to contain all galaxy types and therefore an excellent environment to explore the low-mass end of intra-group light (IGL) assembly. We present a new extended kinematic s
Externí odkaz:
http://arxiv.org/abs/2201.08710
Autor:
Tepper-Garcia, T., Bland-Hawthorn, J., Vasiliev, E., Athanassoula, E., Gerhard, O., Quillen, A., McMillan, P., Freeman, K., Lewis, G. F., Teyssier, R., Sharma, S., Hayden, M. R., Buder, S.
We present an N-body model for the barred Milky Way (MW) galaxy that reproduces many of its properties, including the overall mass distribution, the disc kinematics, and the properties of the central bar. Our high-resolution (N ~ 10^8 particles) simu
Externí odkaz:
http://arxiv.org/abs/2111.05466
Publikováno v:
A&A 653, A143 (2021)
We use the data-driven method, The Cannon, to bring 21,000 stars from the ARGOS bulge survey, including 10,000 red clump stars, onto the parameter and abundance scales of the cross-Galactic survey, APOGEE, obtaining rms precisions of 0.10 dex, 0.07 d
Externí odkaz:
http://arxiv.org/abs/2106.14298
Autor:
Munari, U., Traven, G., Masetti, N., Valisa, P., Righetti, G. -L., Hambsch, F. -J., Frigo, A., Cotar, K., De Silva, G. M., Freeman, K. C., Lewis, G. F., Martell, S. L., Sharma, S., Simpson, J. D., Ting, Y. -S., Wittenmyer, R. A., Zucker, D. B.
We have identified a first group of 33 new candidates for symbiotic stars (SySt) of the accreting-only variety among the 600,255 stars so far observed by the GALAH high-resolution spectroscopic survey of the Southern Hemisphere, more than doubling th
Externí odkaz:
http://arxiv.org/abs/2104.02686
The GALAH survey: effective temperature calibration from the InfraRed Flux Method in the Gaia system
Autor:
Casagrande, L., Lin, J., Rains, A. D., Liu, F., Buder, S., Horner, J., Asplund, M., Lewis, G. F., Martell, S. L., Nordlander, T., Stello, D., Ting, Y. -S., Wittenmyer, R. A., Bland-Hawthorn, J., Casey, A. R., De Silva, G. M., D'Orazi, V., Freeman, K. C., Hayden, M. R., Kos, J., Lind, K., Schlesinger, K. J., Sharma, S., Simpson, J. D., Zucker, D. B., Zwitter, T.
In order to accurately determine stellar properties, knowledge of the effective temperature of stars is vital. We implement Gaia and 2MASS photometry in the InfraRed Flux Method and apply it to over 360,000 stars across different evolutionary stages
Externí odkaz:
http://arxiv.org/abs/2011.02517
Autor:
Aniyan, S., Ponomareva, A. A., Freeman, K. C., Arnaboldi, M., Gerhard, O. E., Coccato, L., Kuijken, K., Merrifield, M.
The mass-to-light ratio (M/L) is a key parameter in decomposing galactic rotation curves into contributions from the baryonic components and the dark halo of a galaxy. One direct observational method to determine the disc M/L is by calculating the su
Externí odkaz:
http://arxiv.org/abs/2010.03991
Autor:
Freeman, K., Dias Pereira, L., Bullor, L., Perego, V.M.E., Escudero, D., Voss, F., Pessoa, T.
This report identifies ways to develop human capital by training agricultural professionals to lead the next generation of technology- and innovation-driven agribusinesses. It suggests providing more incentives to young and skilled entrepreneurs and
Autor:
Hartke, J., Arnaboldi, M., Gerhard, O., Coccato, L., Pulsoni, C., Freeman, K. C., Merrifield, M., Cortesi, A., Kuijken, K.
Publikováno v:
A&A 642, A46 (2020)
M105 (NGC 3379) is an early-type galaxy in the Leo I group. This group is the nearest group that contains all main galaxy types and can thus be used as a benchmark to study the properties of the intra-group light (IGL) in low-mass groups. We use PNe
Externí odkaz:
http://arxiv.org/abs/2008.01696