Zobrazeno 1 - 10
of 57
pro vyhledávání: '"H. C. Harris"'
Autor:
V. Malanushenko, H. C. Harris, Mark SubbaRao, Geza Gyuk, Scott F. Anderson, Jeffrey A. Munn, E. Malanushenko, Kaike Pan, Evalyn Gates, Dmitry Bizyaev, Gillian R. Knapp, J. Liebert, Donald P. Schneider, Patrick B. Hall, J. A. Smith
Publikováno v:
The Astrophysical Journal. 679:697-703
We identify seven new ultracool white dwarfs discovered in the Sloan Digital Sky Survey (SDSS). The SDSS photometry, spectra, and proper motions are presented, and additional BVRI data are given for these and other previously discovered ultracool whi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::788b43e08d89544ffd1131bc95c7e81a
https://doi.org/10.1086/587160
https://doi.org/10.1086/587160
Autor:
D. Q. Lamb, Scot Kleinman, James Liebert, J. Brinkmann, H. C. Harris, Atsuko Nitta, Jurek Krzesinski, Gary D. Schmidt
Publikováno v:
Astronomy & Astrophysics. 417:1093-1099
We report on observations of 15 spectroscopically-identified DO stars from the Sloan Digital Sky Survey (SDSS) database, 13 of which are new discoveries. There are four PG 1159 type stars, two DO stars showing ultra-high excitation ion features (C$_{
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f01b67b19e792020b95b4c613e8ca7cf
https://doi.org/10.1051/0004-6361:20035709
https://doi.org/10.1051/0004-6361:20035709
Autor:
B. Yanny, A. Uomoto, Josh Frieman, D. Q. Lamb, Robert B. Hindsley, A. J. Connolly, Z. Ivezic, D. E. vanden Berk, John E. Anderson, David J. Schlegel, Bruce Margon, Aniruddha R. Thakar, J. Liebert, Donald P. Schneider, Scott F. Anderson, D. G. York, Heidi Jo Newberg, Steve Kent, J. Brinkmann, Brad M. S. Hansen, James E. Gunn, Gregory S. Hennessy, H. C. Harris, Jeffrey A. Munn, J. R. Pier, Xiaohui Fan, Robert C. Nichol, Robert H. Lupton, J. A. Smith, István Csabai, Don Winget, S. Smee, Scott Burles, Michael A. Strauss, Bing Chen, Gillian R. Knapp
Publikováno v:
The Astrophysical Journal. 549:L109-L113
Early data taken during commissioning of the SDSS have resulted in the discovery of a very cool white dwarf. It appears to have stronger collision induced absorption from molecular hydrogen than any other known white dwarf, suggesting it has a cooler
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::824ee02c84b10790627b752a8ec09ed2
https://doi.org/10.1086/319146
https://doi.org/10.1086/319146
Publikováno v:
Experimental Agriculture. 36:223-242
The effect of tillage and crop rotations can only be seen over many crop years. Crop yield and soil results are evaluated from two long-term trials, established in 1978–79 and 1985–86 to investigate various forms of tillage and the timing of such
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df11d5566b7a48f9989c6ade57f76afd
https://doi.org/10.1017/s0014479700002052
https://doi.org/10.1017/s0014479700002052
Autor:
Siegfried Röser, V. S. Kislyuk, N. Zacharias, Ch. de Vegt, B. Bucciarelli, R. W. Argyle, H. C. Harris
Publikováno v:
Highlights of Astronomy. 10:687-691
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8dc880f5aaee45c2e1f50083f5090254
https://doi.org/10.1017/s1539299600012594
https://doi.org/10.1017/s1539299600012594
Autor:
Paul D. Shankland, R. T. Zavala, H. C. Harris, D. J. Hutter, J. A. Benson, Kenneth J. Johnston
Publikováno v:
SPIE Proceedings.
We report progress on the United States Naval Observatory, Navy Prototype Optical Interferometer, Astrometric Catalog (UNAC). This catalog uses observations from eight astrometric observation runs (Jan. 2005 - Nov. 2009) at the Navy Prototype Optical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d63b6ea83ac906224112f7e4db1f6b8
https://doi.org/10.1117/12.858244
https://doi.org/10.1117/12.858244
Autor:
Stefan Dreizler, S. D. Hügelmeyer, H. C. Harris, Atsuko Nitta, Jurek Krzesinski, James Liebert, S. J. Kleinman
Aims. We present a hot white dwarf (WD) luminosity function (LF) using data taken from the Sloan Digital Sky Survey (SDSS) Data Release 4. We present and discuss a combined LF, along with separate DA and non-DA as LFs. We explore the completeness of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a36d823dbe89c82d001543b1df2ba5b
http://resolver.sub.uni-goettingen.de/purl?gs-1/9734
http://resolver.sub.uni-goettingen.de/purl?gs-1/9734
We present a model atmosphere analysis of optical VRI and infrared JHK photometric data of about two dozen ZZ Ceti stars. We first show from a theoretical point of view that the resulting energy distributions are not particularly sensitive to surface
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e0ef0dc609cbc5414a9a0d951db02a22
Autor:
A. Nitta, James Liebert, H. C. Harris, Stefan Dreizler, Jurek Krzesinski, S. D. Hügelmeyer, S. J. Kleinman
A large collection of white dwarf (WD) spectra from Sloan Digital Sky Survey (SDSS) data release 4 (DR4) WD catalog data allowed us to obtain a luminosity function (LF) for the hottest WDs. The LF was calculated basing on spectra of the WDs from a sp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::778200ab2038fdd9b235122ccfffe4a6
http://resolver.sub.uni-goettingen.de/purl?gs-1/5876
http://resolver.sub.uni-goettingen.de/purl?gs-1/5876
Autor:
H. C. Harris, C. L. Clark, Nancy A. Silbermann, A. LaCluyze, L. A. Snyder, Karen Kinemuchi, Horace A. Smith
We present a CCD survey of variable stars in the Draco dwarf spheroidal galaxy. This survey, which has the largest areal coverage since the original variable star survey by Baade & Swope, includes photometry for 270 RR Lyrae stars, 9 anomalous Cephei
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::203d27a95859957ecfbae1d00abf9df4
http://arxiv.org/abs/0808.2542
http://arxiv.org/abs/0808.2542