The discovery of Segue 2: a prototype of the population of satellites of satellites
dc.contributor.author | Belokurov, V. | en_US |
dc.contributor.author | Walker, M. G. | en_US |
dc.contributor.author | Evans, N. W. | en_US |
dc.contributor.author | Gilmore, G. | en_US |
dc.contributor.author | Irwin, M. J. | en_US |
dc.contributor.author | Mateo, Mario | en_US |
dc.contributor.author | Mayer, L. | en_US |
dc.contributor.author | Olszewski, Edward W. | en_US |
dc.contributor.author | Bechtold, J. | en_US |
dc.contributor.author | Pickering, T. | en_US |
dc.date.accessioned | 2010-06-01T19:24:44Z | |
dc.date.available | 2010-06-01T19:24:44Z | |
dc.date.issued | 2009-08-21 | en_US |
dc.identifier.citation | Belokurov, V.; Walker, M. G.; Evans, N. W.; Gilmore, G.; Irwin, M. J.; Mateo, M.; Mayer, L.; Olszewski, E.; Bechtold, J.; Pickering, T. (2009). "The discovery of Segue 2: a prototype of the population of satellites of satellites." Monthly Notices of the Royal Astronomical Society 397(4): 1748-1755. <http://hdl.handle.net/2027.42/72553> | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.issn | 1365-2966 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/72553 | |
dc.description.abstract | We announce the discovery of a new Milky Way satellite Segue 2 found in the data of the Sloan Extension for Galactic Understanding and Exploration (SEGUE). We followed this up with deeper imaging and spectroscopy on the Multiple Mirror Telescope (MMT). From this, we derive a luminosity of M v =−2.5 , a half-light radius of 34 pc and a systemic velocity of ∼−40 km s −1 . Our data also provide evidence for a stream around Segue 2 at a similar heliocentric velocity, and the SEGUE data show that it is also present in neighbouring fields. We resolve the velocity dispersion of Segue 2 as 3.4 km s −1 and the possible stream as ∼7 km s −1 . This object shows points of comparison with other recent discoveries, Segue 1, Boo II and Coma. We speculate that all four objects may be representatives of a population of satellites of satellites – survivors of accretion events that destroyed their larger but less dense parents. They are likely to have formed at redshifts z > 10 and are good candidates for fossils of the reionization epoch. | en_US |
dc.format.extent | 3095549 bytes | |
dc.format.extent | 3109 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | Blackwell Publishing Ltd | en_US |
dc.rights | Journal compilation © 2009 RAS | en_US |
dc.subject.other | Galaxies: Dwarf | en_US |
dc.subject.other | Galaxies: Individual: Segue 2 | en_US |
dc.subject.other | Local Group | en_US |
dc.title | The discovery of Segue 2: a prototype of the population of satellites of satellites | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Astronomy | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA | en_US |
dc.contributor.affiliationother | Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA | en_US |
dc.contributor.affiliationother | Institute for Theoretical Physics, University of ZÜrich, CH-8057 ZÜrich, Switzerland | en_US |
dc.contributor.affiliationother | Steward Observatory, University of Arizona, Tucson, AZ 85721, USA | en_US |
dc.contributor.affiliationother | MMT Observatory, University of Arizona, Tucson, AZ 85271, USA | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/72553/1/j.1365-2966.2009.15106.x.pdf | |
dc.identifier.doi | 10.1111/j.1365-2966.2009.15106.x | en_US |
dc.identifier.source | Monthly Notices of the Royal Astronomical Society | en_US |
dc.identifier.citedreference | Abazajian K. N. et al., 2009, ApSS, in press | en_US |
dc.identifier.citedreference | Barkana R., Loeb A., 1999, ApJ, 523, 54 | en_US |
dc.identifier.citedreference | Belokurov V. et al., 2006a, ApJ, 642, L137 | en_US |
dc.identifier.citedreference | Belokurov V. et al., 2006b, ApJ, 647, L111 | en_US |
dc.identifier.citedreference | Belokurov V. et al., 2007, ApJ, 654, 897 | en_US |
dc.identifier.citedreference | Clem J. L., Vanden Berg D. A., Stetson P. B., 2008, AJ, 135, 682 | en_US |
dc.identifier.citedreference | Diemand J., Kuhlen M., Madau P., 2007, ApJ, 667, 859 | en_US |
dc.identifier.citedreference | Diemand J., Kuhlen M., Madau P., Zemp M., Moore B., Potter D., Stadel J., 2008, Nat, 454, 735 | en_US |
dc.identifier.citedreference | Gilmore G., Wilkinson M. I., Wyse R. F. G., Kleyna J. T., Koch A., Evans N. W., Grebel E. K., 2007, ApJ, 663, 948 | en_US |
dc.identifier.citedreference | Gray D. F., 2005, The Observation and Analysis of Stellar Photospheres. Camb. Univ. Press, Cambridge | en_US |
dc.identifier.citedreference | Illingworth G., 1976, ApJ, 204, 73 | en_US |
dc.identifier.citedreference | Ivezić Z. et al., 2006, Mem. Soc. Astron. Ital., 77, 1057 | en_US |
dc.identifier.citedreference | Kleyna J. T., Wilkinson M. I., Evans N. W., Gilmore G., 2004, MNRAS, 354, L66 | en_US |
dc.identifier.citedreference | Koch A. et al., 2009, ApJ, 690, 453 | en_US |
dc.identifier.citedreference | Koposov S. et al., 2008, ApJ, 686, 279 | en_US |
dc.identifier.citedreference | McLeod B., Geary J., Ordway M., Amato S., Conroy M., Gauron T., 2006, in Beletic J. E., Beletic J. W., Amico P., eds, Scientific Detectors for Astronomy 2005. Springer, Dordrecht, p. 337 | en_US |
dc.identifier.citedreference | Majewski S. R., Ostheimer J. C., Rocha-Pinto H. J., Patterson R. J., Guhathakurta P., Reitzel D., 2004, ApJ, 615, 738 | en_US |
dc.identifier.citedreference | Martin N. F., de Jong J. T. A., Rix H.-W., 2008, ApJ, 684, 1075 | en_US |
dc.identifier.citedreference | Mateo M., Olszewski E. W., Walker M. G., 2008, ApJ, 675, 201 | en_US |
dc.identifier.citedreference | Mayer L., Kazantzidis S., Mastropietro C., Wadsley J., 2007, Nat, 445, 738 | en_US |
dc.identifier.citedreference | Navarro J. F., Frenk C. S., White S. D. M., 1997, ApJ, 490, 493 | en_US |
dc.identifier.citedreference | Niederste-Ostholt M., Belokurov V., Evans N. W., Gilmore G., Wyse R. F. G., Norris J. F., 2009, MNRAS, in press ( arXiv:0906.3669 ) | en_US |
dc.identifier.citedreference | Radovich M., Mellier Y., Bertin E., Missonnier G., Didelon P., Morin B., Dantel-Fort M., McCracken H., 2001, in Banday A. J., Zaroubi S., Bartelmann M., eds, Mining the Sky. Springer-Verlag, Berlin, p. 554 | en_US |
dc.identifier.citedreference | Schlegel D. J., Finkbeiner D. P., Davis M., 1998, ApJ, 500, 525 | en_US |
dc.identifier.citedreference | Simon J. D., Geha M., 2007, ApJ, 670, 313 | en_US |
dc.identifier.citedreference | Walker M. G., Mateo M., Olszewski E. W., Bernstein R., Sen B., Woodroofe M., 2007, ApJS, 171, 389 | en_US |
dc.identifier.citedreference | Walker M. G., Belokurov V., Evans N. W., Irwin M. J., Mateo M., Olszewski E. W., Gilmore G., 2009, ApJ, 694, L144 | en_US |
dc.identifier.citedreference | Walsh S. M., Jerjen H., Willman B., 2007, ApJ, 662, L83 | en_US |
dc.identifier.citedreference | Willman B. et al., 2005, AJ, 129, 2692 | en_US |
dc.identifier.citedreference | Yanny B., 2009, AJ, 137, 4377 | en_US |
dc.identifier.citedreference | Yanny B. et al., 2003, ApJ, 588, 824 | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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