We present the first detections by the NASA K2 mission of oscillations in solar-type stars, using short-cadence data collected during K2 Campaign 1 (C1). We understand the asteroseismic detection thresholds for C1-like levels of photometric performance, and we can detect oscillations in subgiants having dominant oscillation frequencies around 1000 μHz. Changes to the operation of the fine-guidance sensors are expected to give significant improvements in the high-frequency performance from C3 onwards. A reduction in the excess high-frequency noise by a factor of 2.5 in amplitude would bring main-sequence stars with dominant oscillation frequencies as high as ≃2500 μHz into play as potential asteroseismic targets for K2.
Asteroseismology of Solar-Type Stars with K2: Detection of oscillations in C1 Data / Chaplin W.J.; Lund M.N.; Handberg R.; Basu S.; Buchhave L.A.; Campante T.L.; Davies G.R.; Huber D.; Latham D.W.; Latham C.A.; Serenelli A.; Antia H.M.; Appourchaux T.; Ball W.H.; Benomar O.; Casagrande L.; Christensen-Dalsgaard J.; Coelho H.R.; Creevey O.L.; Elsworth Y.; Garcia R.A.; Gaulme P.; Hekker S.; Kallinger T.; Karoff C.; Kawaler S.D.; Kjeldsen H.; Lundkvist M.S.; Marcadon F.; Mathur S.; Miglio A.; Mosser B.; Regulo C.; Roxburgh I.W.; Aguirre V.S.; Stello D.; Verma K.; White T.R.; Bedding T.R.; Barclay T.; Buzasi D.L.; Dehuevels S.; Gizon L.; Houdek G.; Howell S.B.; Salabert D.; Soderblom D.R.. - In: PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC. - ISSN 0004-6280. - ELETTRONICO. - 127:956(2015), pp. 1038-1044. [10.1086/683103]
Asteroseismology of Solar-Type Stars with K2: Detection of oscillations in C1 Data
Miglio A.;
2015
Abstract
We present the first detections by the NASA K2 mission of oscillations in solar-type stars, using short-cadence data collected during K2 Campaign 1 (C1). We understand the asteroseismic detection thresholds for C1-like levels of photometric performance, and we can detect oscillations in subgiants having dominant oscillation frequencies around 1000 μHz. Changes to the operation of the fine-guidance sensors are expected to give significant improvements in the high-frequency performance from C3 onwards. A reduction in the excess high-frequency noise by a factor of 2.5 in amplitude would bring main-sequence stars with dominant oscillation frequencies as high as ≃2500 μHz into play as potential asteroseismic targets for K2.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
