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Your search keyword '"Ford, H. A."' showing total 9 results
Start Over Author "Ford, H. A." Journal monthly notices of the royal astronomical society
9 results on '"Ford, H. A."'

1. CLASH: accurate photometric redshifts with 14 HST bands in massive galaxy cluster cores

Author

Molino, A., primary, Benítez, N., additional, Ascaso, B., additional, Coe, D., additional, Postman, M., additional, Jouvel, S., additional, Host, O., additional, Lahav, O., additional, Seitz, S., additional, Medezinski, E., additional, Rosati, P., additional, Schoenell, W., additional, Koekemoer, A., additional, Jimenez-Teja, Y., additional, Broadhurst, T., additional, Melchior, P., additional, Balestra, I., additional, Bartelmann, M., additional, Bouwens, R., additional, Bradley, L., additional, Czakon, N., additional, Donahue, M., additional, Ford, H., additional, Graur, O., additional, Graves, G., additional, Grillo, C., additional, Infante, L., additional, Jha, S. W., additional, Kelson, D., additional, Lazkoz, R., additional, Lemze, D., additional, Maoz, D., additional, Mercurio, A., additional, Meneghetti, M., additional, Merten, J., additional, Moustakas, L., additional, Nonino, M., additional, Orgaz, S., additional, Riess, A., additional, Rodney, S., additional, Sayers, J., additional, Umetsu, K., additional, Zheng, W., additional, and Zitrin, A., additional

Published
2017
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3. CLASH: z ∼ 6 young galaxy candidate quintuply lensed by the frontier field cluster RXC J2248.7−4431

Author

Monna, A., primary, Seitz, S., additional, Greisel, N., additional, Eichner, T., additional, Drory, N., additional, Postman, M., additional, Zitrin, A., additional, Coe, D., additional, Halkola, A., additional, Suyu, S. H., additional, Grillo, C., additional, Rosati, P., additional, Lemze, D., additional, Balestra, I., additional, Snigula, J., additional, Bradley, L., additional, Umetsu, K., additional, Koekemoer, A., additional, Kuchner, U., additional, Moustakas, L., additional, Bartelmann, M., additional, Benítez, N., additional, Bouwens, R., additional, Broadhurst, T., additional, Donahue, M., additional, Ford, H., additional, Host, O., additional, Infante, L., additional, Jimenez-Teja, Y., additional, Jouvel, S., additional, Kelson, D., additional, Lahav, O., additional, Medezinski, E., additional, Melchior, P., additional, Meneghetti, M., additional, Merten, J., additional, Molino, A., additional, Moustakas, J., additional, Nonino, M., additional, and Zheng, W., additional

Published
2013
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6. The initial mass function and star formation law in the outer disc of NGC 2915.

Author

Bruzzese, S. M., Meurer, G. R., Lagos, C. D. P., Elson, E. C., Werk, J. K., Blakeslee, John P., and Ford, H.

Subjects
STELLAR initial mass function, STELLAR evolution, DISKS (Astrophysics), ASTRONOMICAL photometry
Abstract

Using Hubble Space Telescope (HST) Advanced Camera for Surveys/Wide Field Camera data we present the photometry and spatial distribution of resolved stellar populations in the outskirts of NGC 2915, a blue compact dwarf with an extended H I disc. These observations reveal an elliptical distribution of red giant branch stars, and a clumpy distribution of main-sequence stars that correlate with the H I gas distribution. We constrain the upper-end initial mass function (IMF) and determine the star formation law (SFL) in this field, using the observed main-sequence stars and an assumed constant star formation rate. Previously published Hα observations of the field, which show one faint H II region, are used to provide further constraints on the IMF. We find that the main-sequence luminosity function analysis alone results in a best-fitting IMF with a power-law slope α = -2.85 and upper-mass limit Mu=60M⊙However, if we assume that all Hα emission is confined to H II regions then the upper-mass limit is restricted to Mu≲20M⊙. For the luminosity function fit to be correct, we have to discount the Hα observations implying significant diffuse ionized gas or escaping ionizing photons. Combining the HST photometry with H I imaging, we find the SFL has a power-law index N = 1.53 ± 0.21. Applying these results to the entire outer H I disc indicates that it contributes 11-28 per cent of the total recent star formation in NGC 2915, depending on whether the IMF is constant within the disc or varies from the centre to the outer region. [ABSTRACT FROM AUTHOR]

Published
2015
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7. Supermassive black hole mass measurements for NGC 1300 and 2748 based on Hubble Space Telescope emission-line gas kinematics

Author

Atkinson, J. W., primary, Collett, J. L., additional, Marconi, A., additional, Axon, D. J., additional, Alonso-Herrero, A., additional, Batcheldor, D., additional, Binney, J. J., additional, Capetti, A., additional, Carollo, C. M., additional, Dressel, L., additional, Ford, H., additional, Gerssen, J., additional, Hughes, M. A., additional, Macchetto, D., additional, Maciejewski, W., additional, Merrifield, M. R., additional, Scarlata, C., additional, Sparks, W., additional, Stiavelli, M., additional, Tsvetanov, Z., additional, and van Der Marel, R. P., additional

Published
2005
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9. Supermassive black hole mass measurements for NGC 1300 and 2748 based onHubble Space Telescopeemission-line gas kinematics.

Author

Atkinson, J. W., Collett, J. L., Marconi, A., Axon, D. J., Alonso-Herrero, A., Batcheldor, D., Binney, J. J., Capetti, A., Carollo, C. M., Dressel, L., Ford, H., Gerssen, J., Hughes, M. A., Macchetto, D., Maciejewski, W., Merrifield, M. R., Scarlata, C., Sparks, W., Stiavelli, M., and Tsvetanov, Z.

Subjects
SPIRAL galaxies, ASTRONOMICAL spectroscopy, GALAXY spectra, SUPERMASSIVE black holes, SPECTROGRAPHS
Abstract

We present Space Telescope Imaging Spectrograph emission-line spectra of the central regions of the spiral galaxies NGC 1300 and 2748. From the derived kinematics of the nuclear gas we have found evidence for central supermassive black holes in both galaxies. The estimated masses of the black holes in NGC 1300 and 2748 areand, respectively (both at the 95 per cent confidence level). These two black hole mass estimates contribute to the poorly sampled low-mass end of the nuclear black hole mass spectrum. [ABSTRACT FROM AUTHOR]

Published
2005
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