Zobrazeno 1 - 10
of 823
pro vyhledávání: '"Sheth, R."'
We study systematics associated with estimating simple stellar population (SSP) parameters -- age, metallicity [M/H], $\alpha$-enhancement [$\alpha$/Fe] and IMF shape -- and associated $M_*/L$ gradients, of elliptical slow rotators (E-SRs), fast rota
Externí odkaz:
http://arxiv.org/abs/2211.05800
Autor:
Bernardi, M., Sheth, R. K., Sanchez, H. Dominguez, Margalef-Bentabol, B., Bizyaev, D., Lane, R. R.
Gradients in the stellar populations (SP) of galaxies -- e.g., in age, metallicity, stellar Initial Mass Function (IMF) -- can result in gradients in the stellar mass to light ratio, $M_*/L$. Such gradients imply that the distribution of the stellar
Externí odkaz:
http://arxiv.org/abs/2201.07810
Autor:
Parimbelli, G., Anselmi, S., Viel, M., Carbone, C., Villaescusa-Navarro, F., Corasaniti, P. S., Rasera, Y., Sheth, R., Starkman, G. D., Zehavi, I.
Publikováno v:
JCAP01(2021)009
The linear point (LP), defined as the mid-point between the dip and the peak of the two-point clustering correlation function (TPCF), has been shown to be an excellent standard ruler for cosmology. In fact, it is nearly redshift-independent, being we
Externí odkaz:
http://arxiv.org/abs/2007.10345
This is the third paper of a series where we study the stellar population gradients (SP; ages, metallicities, $\alpha$-element abundance ratios and stellar initial mass functions) of early type galaxies (ETGs) at $z\le 0.08$ from the MaNGA-DR15 surve
Externí odkaz:
http://arxiv.org/abs/2005.07693
Early-type galaxies -- slow and fast rotating ellipticals (E-SRs and E-FRs) and S0s/lenticulars -- define a Fundamental Plane (FP) in the space of half-light radius $R_e$, enclosed surface brightness $I_e$ and velocity dispersion $\sigma_e$. Since $I
Externí odkaz:
http://arxiv.org/abs/2004.07847
Autor:
Pandey, S., Baxter, E. J., Xu, Z., Orlowski-Scherer, J., Zhu, N., Lidz, A., Aguirre, J., DeRose, J., Devlin, M., Hill, J. C., Jain, B., Sheth, R. K., Avila, S., Bertin, E., Brooks, D., Buckley-Geer, E., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Castander, F. J., Cawthon, R., da Costa, L. N., De Vicente, J., Desai, S., Diehl, H. T., Dietrich, J. P., Doel, P., Evrard, A. E., Flaugher, B., Fosalba, P., Frieman, J., García-Bellido, J., Gerdes, D. W., Giannantonio, T., Gruendl, R. A., Gschwend, J., Hartley, W. G., Hollowood, D. L., James, D. J., Krause, E., Kuehn, K., Kuropatkin, N., Maia, M. A. G., Marshall, J. L., Melchior, P., Menanteau, F., Miquel, R., Plazas, A. A., Roodman, A., Sanchez, E., Serrano, S., Sevilla-Noarbe, I., Smith, M., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Wechsler, R. H.
Publikováno v:
Phys. Rev. D 100, 063519 (2019)
An understanding of astrophysical feedback is important for constraining models of galaxy formation and for extracting cosmological information from current and future weak lensing surveys. The thermal Sunyaev-Zel'dovich effect, quantified via the Co
Externí odkaz:
http://arxiv.org/abs/1904.13347
We estimate ages, metallicities, $\alpha$-element abundance ratios and stellar initial mass functions of elliptical (E) and S0 galaxies from the MaNGA-DR15 survey. We stack spectra and use a variety of single stellar population synthesis models to in
Externí odkaz:
http://arxiv.org/abs/1904.11992
We present estimates of stellar population (SP) gradients from stacked spectra of slow (SR) and fast (FR) rotator elliptical galaxies from the MaNGA-DR15 survey. We find that: 1) FRs are $\sim 5$ Gyrs younger, more metal rich, less $\alpha$-enhanced
Externí odkaz:
http://arxiv.org/abs/1904.11996
Autor:
Bernardi, M., Sheth, R. K., Dominguez-Sanchez, H., Fischer, J. -L., Chae, K. -H., Huertas-Company, M., Shankar, F.
Within a galaxy the stellar mass-to-light ratio $\Upsilon_*$ is not constant. Spatially resolved kinematics of nearby early-type galaxies suggest that allowing for a variable initial mass function (IMF) returns significantly larger $\Upsilon_*$ gradi
Externí odkaz:
http://arxiv.org/abs/1712.05414
Autor:
Bernardi, M., Sheth, R. K., Fischer, J. -L., Meert, A., Chae, K. -H., Dominguez-Sanchez, H., Huertas-Company, M., Shankar, F., Vikram, V.
Spatially resolved kinematics of nearby galaxies has shown that the ratio of dynamical- to stellar population-based estimates of the mass of a galaxy ($M_*^{\rm JAM}/M_*$) correlates with $\sigma_e$, if $M_*$ is estimated using the same IMF for all g
Externí odkaz:
http://arxiv.org/abs/1710.07296