Correcting Astrophysical Noise in HARPS-N RV Measurements

Sara Gettel; Francesco Pepe; Andrew Collier Cameron; David Latham; Emilio Molinari; Stephane Udry; David Charbonneau; Mercedes Lopez-Morales; Christophe Lovis; G. Micela; David Philips; G. Piotto; D. Pollacco; Didier Queloz; K. Rice; Dimitar Sasselov; D. Segrasan; Alessandro Sozzetti; A. Szentgyorgyi; Michel Mayor; [No Value] Harps-N Collaborators

Correcting Astrophysical Noise in HARPS-N RV Measurements

Sara Gettel, Francesco Pepe, Andrew Collier Cameron, David Latham, Emilio Molinari, Stephane Udry, David Charbonneau, Mercedes Lopez-Morales, Christophe Lovis, G. Micela, David Philips, G. Piotto, D. Pollacco, Didier Queloz, K. Rice, Dimitar Sasselov, D. Segrasan, Alessandro Sozzetti, A. Szentgyorgyi, Michel Mayor[No Value] Harps-N Collaborators

School of Physics and Astronomy

Research output: Contribution to conference › Poster

Abstract

Radial velocity instrumental precision has improved to the degree that measurements are now limited in part by the noise intrinsic to the host star, or stellar 'jitter'. Several different phenomena contribute to the observed jitter, including pressure waves, granulation, magnetic features caused by stellar activity, and solar-like magnetic cycles. The amplitude of these effects ranges from 10 to 400 cm/s, depending on stellar type, and pose a significant limitation to detecting Earth analogues. We carry out a survey of bright, quiet stars with the new HARPS-N instrument, an ultra-stabilized R=115,000 cross-dispersed spectrograph located on the 3.6m Telescopio Nazionale Galileo on the island of La Palma. We look for correlations between these radial velocity measurements and known activity indicators, including line bisector measurements and the CaII index. We will correct for the presence of starspots by locating and removing quasi-periodic signals consistent with stellar rotation rate. We also investigate new correlations between radial velocity measurements and other observables, including variations in line depth ratios. By correcting for these combined effects, we can improve the radial velocity precision, enabling the detection of low-mass planets.

Original language	English
Publication status	Published - 1 Jul 2013
Event	Protostars and Planets VI - Heidelberg, Germany Duration: 15 Jul 2013 → 20 Jul 2013

Conference

Conference	Protostars and Planets VI
Country/Territory	Germany
City	Heidelberg
Period	15/07/13 → 20/07/13

Access to Document

http://adsabs.harvard.edu/abs/2013prpl.conf2K024G

Cite this

Gettel, S., Pepe, F., Collier Cameron, A., Latham, D., Molinari, E., Udry, S., Charbonneau, D., Lopez-Morales, M., Lovis, C., Micela, G., Philips, D., Piotto, G., Pollacco, D., Queloz, D., Rice, K., Sasselov, D., Segrasan, D., Sozzetti, A., Szentgyorgyi, A., ... Harps-N Collaborators, N. V. (2013). Correcting Astrophysical Noise in HARPS-N RV Measurements. Poster session presented at Protostars and Planets VI, Heidelberg, Germany. http://adsabs.harvard.edu/abs/2013prpl.conf2K024G

@conference{2a05501cbfad477d9699dc22a8816d93,

title = "Correcting Astrophysical Noise in HARPS-N RV Measurements",

abstract = "Radial velocity instrumental precision has improved to the degree that measurements are now limited in part by the noise intrinsic to the host star, or stellar 'jitter'. Several different phenomena contribute to the observed jitter, including pressure waves, granulation, magnetic features caused by stellar activity, and solar-like magnetic cycles. The amplitude of these effects ranges from 10 to 400 cm/s, depending on stellar type, and pose a significant limitation to detecting Earth analogues. We carry out a survey of bright, quiet stars with the new HARPS-N instrument, an ultra-stabilized R=115,000 cross-dispersed spectrograph located on the 3.6m Telescopio Nazionale Galileo on the island of La Palma. We look for correlations between these radial velocity measurements and known activity indicators, including line bisector measurements and the CaII index. We will correct for the presence of starspots by locating and removing quasi-periodic signals consistent with stellar rotation rate. We also investigate new correlations between radial velocity measurements and other observables, including variations in line depth ratios. By correcting for these combined effects, we can improve the radial velocity precision, enabling the detection of low-mass planets.",

author = "Sara Gettel and Francesco Pepe and {Collier Cameron}, Andrew and David Latham and Emilio Molinari and Stephane Udry and David Charbonneau and Mercedes Lopez-Morales and Christophe Lovis and G. Micela and David Philips and G. Piotto and D. Pollacco and Didier Queloz and K. Rice and Dimitar Sasselov and D. Segrasan and Alessandro Sozzetti and A. Szentgyorgyi and Michel Mayor and {Harps-N Collaborators}, {[No Value]}",

note = "Protostars and Planets VI, Heidelberg, July 15-20, 2013. Poster #2K024; Protostars and Planets VI ; Conference date: 15-07-2013 Through 20-07-2013",

year = "2013",

month = jul,

day = "1",

language = "English",

}

Gettel, S, Pepe, F, Collier Cameron, A, Latham, D, Molinari, E, Udry, S, Charbonneau, D, Lopez-Morales, M, Lovis, C, Micela, G, Philips, D, Piotto, G, Pollacco, D, Queloz, D, Rice, K, Sasselov, D, Segrasan, D, Sozzetti, A, Szentgyorgyi, A, Mayor, M & Harps-N Collaborators, NV 2013, 'Correcting Astrophysical Noise in HARPS-N RV Measurements', Protostars and Planets VI, Heidelberg, Germany, 15/07/13 - 20/07/13. <http://adsabs.harvard.edu/abs/2013prpl.conf2K024G>

TY - CONF

T1 - Correcting Astrophysical Noise in HARPS-N RV Measurements

AU - Gettel, Sara

AU - Pepe, Francesco

AU - Collier Cameron, Andrew

AU - Latham, David

AU - Molinari, Emilio

AU - Udry, Stephane

AU - Charbonneau, David

AU - Lopez-Morales, Mercedes

AU - Lovis, Christophe

AU - Micela, G.

AU - Philips, David

AU - Piotto, G.

AU - Pollacco, D.

AU - Queloz, Didier

AU - Rice, K.

AU - Sasselov, Dimitar

AU - Segrasan, D.

AU - Sozzetti, Alessandro

AU - Szentgyorgyi, A.

AU - Mayor, Michel

AU - Harps-N Collaborators, [No Value]

N1 - Protostars and Planets VI, Heidelberg, July 15-20, 2013. Poster #2K024

PY - 2013/7/1

Y1 - 2013/7/1

N2 - Radial velocity instrumental precision has improved to the degree that measurements are now limited in part by the noise intrinsic to the host star, or stellar 'jitter'. Several different phenomena contribute to the observed jitter, including pressure waves, granulation, magnetic features caused by stellar activity, and solar-like magnetic cycles. The amplitude of these effects ranges from 10 to 400 cm/s, depending on stellar type, and pose a significant limitation to detecting Earth analogues. We carry out a survey of bright, quiet stars with the new HARPS-N instrument, an ultra-stabilized R=115,000 cross-dispersed spectrograph located on the 3.6m Telescopio Nazionale Galileo on the island of La Palma. We look for correlations between these radial velocity measurements and known activity indicators, including line bisector measurements and the CaII index. We will correct for the presence of starspots by locating and removing quasi-periodic signals consistent with stellar rotation rate. We also investigate new correlations between radial velocity measurements and other observables, including variations in line depth ratios. By correcting for these combined effects, we can improve the radial velocity precision, enabling the detection of low-mass planets.

AB - Radial velocity instrumental precision has improved to the degree that measurements are now limited in part by the noise intrinsic to the host star, or stellar 'jitter'. Several different phenomena contribute to the observed jitter, including pressure waves, granulation, magnetic features caused by stellar activity, and solar-like magnetic cycles. The amplitude of these effects ranges from 10 to 400 cm/s, depending on stellar type, and pose a significant limitation to detecting Earth analogues. We carry out a survey of bright, quiet stars with the new HARPS-N instrument, an ultra-stabilized R=115,000 cross-dispersed spectrograph located on the 3.6m Telescopio Nazionale Galileo on the island of La Palma. We look for correlations between these radial velocity measurements and known activity indicators, including line bisector measurements and the CaII index. We will correct for the presence of starspots by locating and removing quasi-periodic signals consistent with stellar rotation rate. We also investigate new correlations between radial velocity measurements and other observables, including variations in line depth ratios. By correcting for these combined effects, we can improve the radial velocity precision, enabling the detection of low-mass planets.

M3 - Poster

T2 - Protostars and Planets VI

Y2 - 15 July 2013 through 20 July 2013

ER -

Correcting Astrophysical Noise in HARPS-N RV Measurements

Abstract

Conference

Access to Document

Fingerprint

Cite this