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1,135 results on '"Brown, G. M"'

2. Connecting low- and high-mass star formation: the intermediate-mass protostar IRAS 05373+2349 VLA 2

Author

Brown, G. M., Johnston, K. G., Hoare, M. G., and Lumsden, S. L.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

Until recently, there have been few studies of the protostellar evolution of intermediate-mass (IM) stars, which may bridge the low- and high-mass regimes. This paper aims to investigate whether the properties of an IM protostar within the IRAS 05373+2349 embedded cluster are similar to that of low- and/or high-mass protostars. We carried out Very Large Array as well as Combined Array for Research in Millimeter Astronomy continuum and 12CO(J=1-0) observations, which uncover seven radio continuum sources (VLA 1-7). The spectral index of VLA 2, associated with the IM protostar is consistent with an ionised stellar wind or jet. The source VLA 3 is coincident with previously observed H2 emission line objects aligned in the north-south direction (P.A. -20 to -12 deg), which may be either an ionised jet emanating from VLA 2 or (shock-)ionised cavity walls in the large-scale outflow from VLA 2. The position angle between VLA 2 and 3 is slightly misaligned with the large-scale outflow we map at ~5-arcsec resolution in 12CO (P.A. ~30 deg), which in the case of a jet suggests precession. The emission from the mm core associated with VLA 2 is also detected; we estimate its mass to be 12-23 Msun, depending on the contribution from ionised gas. Furthermore, the large-scale outflow has properties intermediate between outflows from low- and high-mass young stars. Therefore, we conclude that the IM protostar within IRAS 05373+2349 is phenomenologically as well as quantitatively intermediate between the low- and high-mass domains., Comment: 11 pages, 7 figures and 4 tables. Accepted by MNRAS

Published
2016
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3. Genetic mapping on human chromosome 9 by analysis of meiotic recombination in single sperm using polymorphic microsatellite markers

Author

Brown, G. M.

Subjects
572.8
Abstract

Flow-stored single sperm were amplified by polymerase chain reaction (PCR) to compare the genetic recombination of 4 individuals using a series of polymorphic microsatellite markers across human chromosome 9q31-q34.3. Firstly, a method was developed to circumvent the problem of marker scarcity in certain areas of the genome. The method enriched a chromosome 9-specific plasmid library for [CA]n microsatellite sequences which could then be investigated for heterozygosity and use as genetic markers. 64% of [CA]n sequences identified after the enrichment procedure were found to contain a tract of at least 12 repeat units; the size at which such tandem repeats are thought to have the potential to be polymorphic. 3 clones were selected and characterised. One clone was found to have an estimated heterozygosity of 82% and was designated D9S749. Sperm typing was performed using a protocol involving whole genome amplification using[N]15-mers and single step multiplex of sets of markers on 2 normal donors for a series of markers spanning 9q31-q34.3. Linkage analysis was performed with CRIMAP, adapted for sperm typing, and the sperm typing program SPERM. The marker order found for 1 donor was cen-D9S109-D9S59-D9S170-D9S154-D9S315-ASS-D9S149-D9S67-ter. This data was in agreement with previously published data but the ordering of D9S170 centromeric to D9S154 had not been previously reported. The same order was found for the marker set of the second donor. Some heterogeneity was found in the % recombination between these 2 individuals with significant differences in recombination frequencies between some markers.

Published
1997

27. Third International Symposium for health professionals in rheumatology: Enschede 6–9 June 1990

Author

Lorig, K., Seydel, E., Taal, E., Rasker, H., Basler, H. D., Geidel, H., Leuschner, G., Verreusel, R. L. P., Lubberts E. W., Theunisse H. A. M., Falkenbach, A., Wigand, R., Kaltwasser, P., Clayson, M., Phillips, P., Graafsma, E. A. M., Riemsma, R., Brus, H., Rasker, J. J., Cziske, R., Jaeckel, W. H., Jacobi, E., Manshanden, M. A. C., Schenk, F. C., Dijkmans, B. A. C., Nordenskiöld, U., Harmer, R., Wright, V., Hill, J., Bird, H., Elst, Ph., Eshof, I. v. d., Fits, I. v. d., Laar, M. v. d., Willigen, J. v., Boomgaardt, I. K., Tulleken, J. E., de Vries, E. G. E., van Rijswijk, M. H., Lankveld, W. v., Daamen, K., Bosch, P. v. 't Pad, Richardson, M. U. S., Huiskes, C. J. A. E., Kraaimaat, F. W., Bijlsma, J. W. J., de Witte, L. P., Winants, B. A. C., Tilli, D. J. P., van der Linden, Sj., van der Horst, F. G., Groen, J. J., Sargautyté, R., Kočiùnas, R., Ammer, K., Karetta, M., Samuelsson, A., Bjelle, A., Sullivan, M., Pincus, T., Callahan, L. F., Persson, L. O., Berglund, K., Kuiper, C. H. Z., Poulsen, A., Oosterveld, F. G. J., Jacobs, J. W. G., Overmars, H. J. A., Uytterhoeven, R., Keulemans, M., Dequeker, J., Geusens, P., Struthers, T. J., Brown, J., Dapper, M. M. L., Phiferons, H., van der Velde, E. A., Janssen, M., Raspe, H. H., Mattussek, S., Deck, R., Malcus-Johnson, P., Sandqvist, G., van Veldhoven, G., Demeester, V., Bird, H. A., Maycock, J., Peeters, W., Welkenhuysen, M., Cartois, J., Wassenaar, W. H., Tulleken, J. E., Tromp, C. N., Löfkvist, U., Eberhardt, K., Kessler, S., Potthoff, P., Ekdahl, Ch., Brooks, R. H., Bakker, C. H., Rutten-van Mölken, M., van Doorslaer, E., Boykinov, I. N., Lolkema, W., van Leeuwen, M. A., Fordham, J. N., Stamp, J., Holwerda-Straver, I., Wexsahl, H., Torud, Y., Eggen, A. E., Kruse-Jensen, A., Munthe, E., Lubberts, E. W., Lacko, B. J. S., Theunisse, H. A. M., van Riel, P. L. C. M., Bos, A. M. E., Brattström, M., Thorsell, U., Widell, G., Claesson, K., Karlsson, L., Struthers, J., Doeglas, D., Suurmeijer, Th., Sanderman, R., Krol, B., Tuinstra, J., Suurmeyer, Th. P. B. M., Pelt, R. A. G. B., Goei The, H. S., Thomassen, J. M. C., Damhuis-Friedrich, E., Chikanza, I. C., Panayi, G. S., Forre, O., Fredriksen, B., Bakken, L., Guillemin, F., Larsson, B. M, Nived, K., Eberharsdt, K., Ahlund, O., Briancon, S., Baumann, M., Kroll, B., Douglas, D., Suurmeijer, T., Le Gallez, P., Siesling, M., Brown, G. M. M., Jessop, S., Ropers, G., Sangha, O., Kriegel, W., Konietzny, G., Suurmeijer, Th. P. B. M., Skarulis, R., Gaigaliene, B., Raistenskis, J., Ceremnych-Aleksejenko, E., Cobotas, M., Barlow, J. H., Macey, S. J., Struthers, G., Gorjaev, Y. A., Menshikova, L. V., Fahmy, Z., Braun, B., Lohmann, J., Members of European Research on Incapacitating Disease and Social Support, and Arthritis team

Published
1990
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28. Requirements analysis for a multi-spacecraft flight system

Author

Brown, G. M, O'Quinn, C. F, and Porter, B. S

Abstract

The StarLight mission scheduled to launch June 2006, will demonstrate the separated spacecraft technologies of formation flying, precision formation, estimation, and long baseline stellar interferometry.

Published
2002

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