Zobrazeno 1 - 10
of 256
pro vyhledávání: '"Fischer, J. L."'
We describe the SDSS-IV MaNGA PyMorph Photometric (MPP-VAC) and MaNGA Deep Learning Morphology (MDLM-VAC) Value Added Catalogs. The MPP-VAC provides photometric parameters from S\'ersic and S\'ersic+Exponential fits to the 2D surface brightness profi
Externí odkaz:
http://arxiv.org/abs/1811.02580
Autor:
Sánchez, H. Domínguez, Huertas-Company, M., Bernardi, M., Kaviraj, S., Fischer, J. L., Abbott, T. M. C., Abdalla, F. B., Annis, J., Avila, S., Brooks, D., Buckley-Geer, E., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Cunha, C. E., D'Andrea, C. B., da Costa, L. N., Davis, C., De Vicente, J., Doel, P., Evrard, A. E., Fosalba, P., Frieman, J., García-Bellido, J., Gaztanaga, E., Gerdes, D. W., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hartley, W. G., Hollowood, D. L., Honscheid, K., Hoyle, B., James, D. J., Kuehn, K., Kuropatkin, N., Lahav, O., Maia, M. A. G., March, M., Melchior, P., Menanteau, F., Miquel, R., Nord, B., Plazas, A. A., Sanchez, E., Scarpine, V., Schindler, R., Schubnell, M., Smith, M., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Walker, A. R., Zuntz, J.
Deep Learning (DL) algorithms for morphological classification of galaxies have proven very successful, mimicking (or even improving) visual classifications. However, these algorithms rely on large training samples of labelled galaxies (typically tho
Externí odkaz:
http://arxiv.org/abs/1807.00807
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
We present a morphological catalogue for $\sim$ 670,000 galaxies in the Sloan Digital Sky Survey in two flavours: T-Type, related to the Hubble sequence, and Galaxy Zoo 2 (GZ2 hereafter) classification scheme. By combining accurate existing visual cl
Externí odkaz:
http://arxiv.org/abs/1711.05744
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
A number of recent estimates of the total luminosities of galaxies in the SDSS are significantly larger than those reported by the SDSS pipeline. This is because of a combination of three effects: one is simply a matter of defining the scale out to w
Externí odkaz:
http://arxiv.org/abs/1702.08526
Autor:
Bernardi, M., Fischer, J. -L., Sheth, R. K., Meert, A., Huertas-Company, M., Shankar, F., Vikram, V.
The Sloan Digital Sky Survey pipeline photometry underestimates the brightnesses of the most luminous galaxies. This is mainly because (i) the SDSS overestimates the sky background and (ii) single or two-component Sersic-based models better fit the s
Externí odkaz:
http://arxiv.org/abs/1702.08527
Autor:
Bernardi, M., Meert, A., Sheth, R. K., Fischer, J. -L., Huertas-Company, M., Maraston, C., Shankar, F., Vikram, V.
We quantify the systematic effects on the stellar mass function which arise from assumptions about the stellar population, as well as how one fits the light profiles of the most luminous galaxies at z ~ 0.1. When comparing results from the literature
Externí odkaz:
http://arxiv.org/abs/1604.01036