A multi-site campaign to measure solar-like oscillations in Procyon. II. mode frequencies

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Fältnamn	Indikatorer	Metadata
000		04589naa a2200913 4500
001		oai:DiVA.org:uu-147437
003		SwePub
008		110225s2010 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-1474372 URI
024	7	a https://doi.org/10.1088/0004-637X/713/2/9352 DOI
040		a (SwePub)uu
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Bedding, Timothy R.4 aut
245	1 0	a A multi-site campaign to measure solar-like oscillations in Procyon. II. mode frequencies
264	1	c 2010
338		a print2 rdacarrier
520		a We have analyzed data from a multi-site campaign to observe oscillations in the F5 star Procyon. The data consist of high-precision velocities that we obtained over more than three weeks with 11 telescopes. A new method for adjusting the data weights allows us to suppress the sidelobes in the power spectrum. Stacking the power spectrum in a so-called echelle diagram reveals two clear ridges, which we identify with even and odd values of the angular degree (l = 0 and 2, and l = 1 and 3, respectively). We interpret a strong, narrow peak at 446 mu Hz that lies close to the l = 1 ridge as a mode with mixed character. We show that the frequencies of the ridge centroids and their separations are useful diagnostics for asteroseismology. In particular, variations in the large separation appear to indicate a glitch in the sound-speed profile at an acoustic depth of similar to 1000 s. We list frequencies for 55 modes extracted from the data spanning 20 radial orders, a range comparable to the best solar data, which will provide valuable constraints for theoretical models. A preliminary comparison with published models shows that the offset between observed and calculated frequencies for the radial modes is very different for Procyon than for the Sun and other cool stars. We find the mean lifetime of the modes in Procyon to be 1.29(-0.49)(+0.55) days, which is significantly shorter than the 2-4 days seen in the Sun.
650	7	a NATURVETENSKAPx Fysik0 (SwePub)1032 hsv//swe
650	7	a NATURAL SCIENCESx Physical Sciences0 (SwePub)1032 hsv//eng
653		a stars: individual (Procyon A)
653		a stars: oscillations
653		a Physics
653		a Fysik
700	1	a Kjeldsen, Hans4 aut
700	1	a Campante, Tiago L.4 aut
700	1	a Appourchaux, Thierry4 aut
700	1	a Bonanno, Alfio4 aut
700	1	a Chaplin, William J.4 aut
700	1	a Garcia, Rafael A.4 aut
700	1	a Martic, Milena4 aut
700	1	a Mosser, Benoit4 aut
700	1	a Butler, R. Paul4 aut
700	1	a Bruntt, Hans4 aut
700	1	a Kiss, Laszlo L.4 aut
700	1	a O'Toole, Simon J.4 aut
700	1	a Kambe, Eiji4 aut
700	1	a Ando, Hiroyasu4 aut
700	1	a Izumiura, Hideyuki4 aut
700	1	a Sato, Bun'ei4 aut
700	1	a Hartmann, Michael4 aut
700	1	a Hatzes, Artie4 aut
700	1	a Barban, Caroline4 aut
700	1	a Berthomieu, Gabrielle4 aut
700	1	a Michel, Eric4 aut
700	1	a Provost, Janine4 aut
700	1	a Turck-Chieze, Sylvaine4 aut
700	1	a Lebrun, Jean-Claude4 aut
700	1	a Schmitt, Jerome4 aut
700	1	a Bertaux, Jean-Loup4 aut
700	1	a Benatti, Serena4 aut
700	1	a Claudi, Riccardo U.4 aut
700	1	a Cosentino, Rosario4 aut
700	1	a Leccia, Silvio4 aut
700	1	a Frandsen, Soren4 aut
700	1	a Brogaard, Karsten4 aut
700	1	a Glowienka, Lars4 aut
700	1	a Grundahl, Frank4 aut
700	1	a Stempels, Ericu Uppsala universitet,Observationell astrofysik4 aut0 (Swepub:uu)ericstem
700	1	a Arentoft, Torben4 aut
700	1	a Bazot, Michael4 aut
700	1	a Christensen-Dalsgaard, Jorgen4 aut
700	1	a Dall, Thomas H.4 aut
700	1	a Karoff, Christoffer4 aut
700	1	a Lundgreen-Nielsen, Jens4 aut
700	1	a Carrier, Fabien4 aut
700	1	a Eggenberger, Patrick4 aut
700	1	a Sosnowska, Danuta4 aut
700	1	a Wittenmyer, Robert A.4 aut
700	1	a Endl, Michael4 aut
700	1	a Metcalfe, Travis S.4 aut
700	1	a Hekker, Saskia4 aut
700	1	a Reffert, Sabine4 aut
710	2	a Uppsala universitetb Observationell astrofysik4 org
773	0	t Astrophysical Journalg 713:2, s. 935-949q 713:2<935-949x 0004-637Xx 1538-4357
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-147437
856	4 8	u https://doi.org/10.1088/0004-637X/713/2/935

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Av författaren/redakt...: Bedding, Timothy ...; Kjeldsen, Hans; Campante, Tiago ...; Appourchaux, Thi ...; Bonanno, Alfio; Chaplin, William ...; visa fler...; Garcia, Rafael A ...; Martic, Milena; Mosser, Benoit; Butler, R. Paul; Bruntt, Hans; Kiss, Laszlo L.; O'Toole, Simon J ...; Kambe, Eiji; Ando, Hiroyasu; Izumiura, Hideyu ...; Sato, Bun'ei; Hartmann, Michae ...; Hatzes, Artie; Barban, Caroline; Berthomieu, Gabr ...; Michel, Eric; Provost, Janine; Turck-Chieze, Sy ...; Lebrun, Jean-Cla ...; Schmitt, Jerome; Bertaux, Jean-Lo ...; Benatti, Serena; Claudi, Riccardo ...; Cosentino, Rosar ...; Leccia, Silvio; Frandsen, Soren; Brogaard, Karste ...; Glowienka, Lars; Grundahl, Frank; Stempels, Eric; Arentoft, Torben; Bazot, Michael; Christensen-Dals ...; Dall, Thomas H.; Karoff, Christof ...; Lundgreen-Nielse ...; Carrier, Fabien; Eggenberger, Pat ...; Sosnowska, Danut ...; Wittenmyer, Robe ...; Endl, Michael; Metcalfe, Travis ...; Hekker, Saskia; Reffert, Sabine; visa färre...

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