Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Frandsen, Soeren"'
Autor:
Brewer, Lauren N., Sandquist, Eric L., Mathieu, Robert D., Milliman, Katelyn, Geller, Aaron M., Jeffries Jr., Mark W., Orosz, Jerome A., Brogaard, Karsten, Platais, Imants, Bruntt, Hans, Grundahl, Frank, Stello, Dennis, Frandsen, Soeren
As part of our study of the old (~2.5 Gyr) open cluster NGC 6819 in the Kepler field, we present photometric (Kepler and ground-based BVRcIc) and spectroscopic observations of the detached eclipsing binary WOCS 24009 (Auner 665; KIC 5023948) with a s
Externí odkaz:
http://arxiv.org/abs/1601.04069
The open clusters in the Kepler and CoRoT fields potentially provide tight constraints for tests of stellar models and observational methods because they allow a combination of complementary methods. We are in the process of identi- fying and measuri
Externí odkaz:
http://arxiv.org/abs/1409.2271
Autor:
Jeffries, Jr., Mark W., Sandquist, Eric L., Mathieu, Robert D., Geller, Aaron M., Orosz, Jerome A., Milliman, Katelyn E., Brewer, Lauren N., Platais, Imants, Brogaard, Karsten, Grundahl, Frank, Frandsen, Soeren, Dotter, Aaron, Stello, Dennis
We analyze extensive BVR_cI_c time-series photometry and radial-velocity measurements for WOCS 40007 (Auner 259; KIC 5113053), a double-lined detached eclipsing binary and a member of the open cluster NGC 6819. Utilizing photometric observations from
Externí odkaz:
http://arxiv.org/abs/1307.0442
Autor:
Sandquist, Eric L., Mathieu, Robert D., Brogaard, Karsten, Meibom, Soren, Geller, Aaron M., Orosz, Jerome A., Milliman, Katelyn E., Jeffries Jr, Mark W., Brewer, Lauren N., Platais, Imants, Grundahl, Frank, Bruntt, Hans, Frandsen, Soeren, Stello, Dennis
We present the discovery of the totally eclipsing long-period (P = 771.8 d) binary system WOCS 23009 in the old open cluster NGC 6819 that contains both an evolved star near central hydrogen exhaustion and a low-mass (0.45 Msun) star. This system was
Externí odkaz:
http://arxiv.org/abs/1211.2527
Autor:
Bedding, Timothy R., Mosser, Benoit, Huber, Daniel, Montalban, Josefina, Beck, Paul, Christensen-Dalsgaard, Joergen, Elsworth, Yvonne P., Garcia, Rafael A., Miglio, Andrea, Stello, Dennis, White, Timothy R., De Ridder, Joris, Hekker, Saskia, Aerts, Conny, Barban, Caroline, Belkacem, Kevin, Broomhall, Anne-Marie, Brown, Timothy M., Buzasi, Derek L., Carrier, Fabien, Chaplin, William J., Di Mauro, Maria Pia, Dupret, Marc-Antoine, Frandsen, Soeren, Gilliland, Ronald L., Goupil, Marie-Jo, Jenkins, Jon M., Kallinger, Thomas, Kawaler, Steven, Kjeldsen, Hans, Mathur, Savita, Noels, Arlette, Aguirre, Victor Silva, Ventura, Paolo
Red giants are evolved stars that have exhausted the supply of hydrogen in their cores and instead burn hydrogen in a surrounding shell. Once a red giant is sufficiently evolved, the helium in the core also undergoes fusion. Outstanding issues in our
Externí odkaz:
http://arxiv.org/abs/1103.5805
Autor:
Molenda-Zakowicz, Joanna, Bruntt, Hans, Sousa, Sergio, Frasca, Antonio, Biazzo, Katia, Huber, Daniel, Ireland, Mike, Bedding, Tim, Stello, Dennis, Uytterhoeven, Katrien, Dreizler, Stefan, De Cat, Peter, Briquet, Maryline, Catanzaro, Giovanni, Karoff, Chistoffer, Frandsen, Soeren, Spezzi, Loredana, Catala, Claude
We report on the ground-based follow-up program of spectroscopic and photometric observations of solar-like asteroseismic targets for the Kepler space mission. These stars constitute a large group of more than thousand objects which are the subject o
Externí odkaz:
http://arxiv.org/abs/1005.0986
Autor:
Hunter, Deborah J., Valenti, Stefano, Kotak, Rubina, Meikle, Peter, Taubenberger, Stefan, Pastorello, Andrea, Benetti, Stefano, Stanishev, Vallery, Smartt, Steven J., Trundle, Carrie, Arkharov, Arkady A., Bufano, Milena, Cappellaro, Enrico, Di Carlo, Elisa, Dolci, Mauro, Elias-Rosa, Nancy, Frandsen, Soeren, Fynbo, Johan U., Hopp, Ulrich, Larionov, Valeri M., Laursen, Peter, Mazzali, Paolo, Navasardyan, Hripsime, Ries, Christoph, Riffeser, Arno, Rizzi, Luca, Tsvetkov, Dmitrii Y., Turatto, Massimo, Wilke, Silona
We present photometric and spectroscopic observations at optical and near-infrared wavelengths of the nearby type Ic SN 2007gr. These represent the most extensive data-set to date of any supernova of this sub-type, with frequent coverage from shortly
Externí odkaz:
http://arxiv.org/abs/0909.3780
Autor:
Arentoft, Torben, Kjeldsen, Hans, Bedding, Timothy R., Bazot, Michael, Christensen-Dalsgaard, Joergen, Dall, Thomas H., Karoff, Christoffer, Carrier, Fabien, Eggenberger, Patrick, Sosnowska, Danuta, Wittenmyer, Robert A., Endl, Michael, Metcalfe, Travis S., Hekker, Saskia, Reffert, Sabine, Butler, R. Paul, Bruntt, Hans, Kiss, Laszlo L., O'Toole, Simon J., Kambe, Eiji, Ando, Hiroyasu, Izumiura, Hideyuki, Sato, Bun'ei, Hartmann, Michael, Hatzes, Artie, Bouchy, Francois, Mosser, Benoit, Appourchaux, Thierry, Barban, Caroline, Berthomieu, Gabrielle, Garcia, Rafael A., Michel, Eric, Provost, Janine, Turck-Chieze, Sylvaine, Martic, Milena, Lebrun, Jean-Claude, Schmitt, Jerome, Bertaux, Jean-Loup, Bonanno, Alfio, Benatti, Serena, Claudi, Riccardo U., Cosentino, Rosario, Leccia, Silvio, Frandsen, Soeren, Brogaard, Karsten, Glowienka, Lars, Grundahl, Frank, Stempels, Eric
We have carried out a multi-site campaign to measure oscillations in the F5 star Procyon A. We obtained high-precision velocity observations over more than three weeks with eleven telescopes, with almost continuous coverage for the central ten days.
Externí odkaz:
http://arxiv.org/abs/0807.3794
Autor:
Bedding, Timothy R., Kjeldsen, Hans, Arentoft, Torben, Bouchy, Francois, Brandbyge, Jacob, Brewer, Brendon J., Butler, R. Paul, Christensen-Dalsgaard, Joergen, Dall, Thomas, Frandsen, Soeren, Karoff, Christoffer, Kiss, Laszlo L., Monteiro, Mario J. P. F. G., Pijpers, Frank P., Teixeira, Teresa C., Tinney, C. G., Baldry, Ivan K., Carrier, Fabien, O'Toole, Simon J.
Publikováno v:
Astrophys.J.663:1315-1324,2007
We have observed oscillations in the nearby G2 subgiant star beta Hyi using high-precision velocity observations obtained over more than a week with the HARPS and UCLES spectrographs. The oscillation frequencies show a regular comb structure, as expe
Externí odkaz:
http://arxiv.org/abs/astro-ph/0703747
Publikováno v:
Astron.J. 109 (1995) 1313
We have observed evidence for $p$-mode oscillations in the G0 IV star etaBoo (V = 2.68). This represents the first clear evidence of solar-like oscillations in a star other than the Sun. We used a new technique which measures fluctuations in the temp
Externí odkaz:
http://arxiv.org/abs/astro-ph/9411016