HARPS timeseries data for HD41248 Virtual Observatory Resource

Authors
  1. Jenkins J.S.
  2. Tuomi M.
  3. Published by
    CDS
Abstract

Gaining a better understanding of the effects of stellar-induced radial velocity noise is critical for the future of exoplanet studies since the discovery of the lowest-mass planets using this method will require us to go below the intrinsic stellar noise limit. An interesting test case in this respect is that of the southern solar analog HD 41248. The radial velocity time series of this star has been proposed to contain either a pair of signals with periods of around 18 and 25 days, which could be due to a pair of resonant super-Earths, or a single and varying 25 day signal that could arise due to a complex interplay between differential rotation and modulated activity. In this work, we build up more evidence for the former scenario, showing that the signals are still clearly significant, even after more than 10 yr of observations, and they likely do not change in period, amplitude, or phase as a function of time, the hallmarks of static Doppler signals. We show that over the last two observing seasons, this star was more intrinsically active and the noise reddened, highlighting why better noise models are needed to find the lowest amplitude signals, in particular, models that consider noise correlations. This analysis shows that there is still sufficient evidence for the existence of two super-Earths on the edge of, or locked into, a 7:5 mean motion resonance orbiting HD 41248.

Keywords
  1. g-stars
  2. radial-velocity
Bibliographic source Bibcode
2014ApJ...794..110J
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/794/110
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/794/110
Document Object Identifer DOI
doi:10.26093/cds/vizier.17940110

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/794/110
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/794/110
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/794/110
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).

History

2017-05-16T15:42:20Z
Resource record created
2017-05-16T15:42:20Z
Created
2017-07-03T13:50:21Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr