Photospheric and chromospheric activity on the young solar-type star HD 171488 (V889 Herculis)

@article{Frasca2010PhotosphericAC,
  title={Photospheric and chromospheric activity on the young solar-type star HD 171488 (V889 Herculis)},
  author={A. Frasca and K. Biazzo and Zs. Kőv{\'a}ri and Ettore Marilli and Osservatorio Astrofisico di Catania and Inaf - Arcetri and Konkoly Observatory and Ege University and Tubitak National Observatory},
  journal={Astronomy and Astrophysics},
  year={2010},
  volume={518}
}
Aims. We present the results of contemporaneous spectroscopic and photometric monitoring of the young solar-type star HD 171488 (Prot � 1.337 days) aimed at studying surface inhomogeneities at both photospheric and chromospheric levels. Methods. Echelle FOCES spectra (R � 40000) and Johnson BV photometry have been performed in August 2006, with a good coverage of rotational phases. Spectral type, rotational velocity, metalicity, and gravity were determined with a code developed by us (Rotfit… 

Figures and Tables from this paper

Stellar Chromospheric Variability
Cool stars with convective envelopes of spectral types F and later tend to exhibit magnetic activity throughout their atmospheres. The presence of strong and variable magnetic fields is evidenced by
Magnetic activity and differential rotation in the very young star KIC 8429280
Aims. We present a spectroscopic and photometric analysis of the rapid rotator KIC 8429280, discovered by ourselves as a very young star and observed by the NASA Kepler mission, designed to determine
From CoRoT 102899501 to the Sun A time evolution model of chromospheric activity on the main sequence
Aims. The present study reports measurements of the rotation period of a young solar analogue, estimates of its surface coverage by photospheric starspots and of its chromospheric activity level, and
CHROMOSPHERIC ACTIVITY AND ROTATIONAL MODULATION ON THE YOUNG, SINGLE K2 DWARF LQ Hya
High-resolution echelle spectra of LQ Hya, obtained during several observing runs from 2006 to 2012, have been analyzed to study its chromospheric activity. Using the spectral subtraction technique,
Star-spot distributions and chromospheric activity on the RS CVn type eclipsing binary SV Cam
Using a time series of high-resolution spectra and high-quality multicolour photometry, we reconstruct surface maps of the primary component of the RS CVn type rapidly rotating eclipsing binary, SV
Magnetic activity and differential rotation in the young Sun-like stars KIC 7985370 and KIC 7765135
Aims. We present a detailed study of the two Sun-like stars KIC 7985370 and KIC 7765135, to determine their activity level, spot distribution, and differential rotation. Both stars were previously
Chromospheric activity on late-type star LQ Hya
We present new high-resolution echelle spectra of LQ Hya to study its chromospheric activity. We analyzed our spectroscopic observations including several optical indicators of chromospheric activity
High-Dispersion Spectroscopy of the Superflare Star KIC 6934317
We conducted the high-resolution spectroscopic observation with Subaru/HDS for a G-type star (KIC6934317). We selected this star from the data of the Kepler spacecraft. This star produces a lot of
Long-term spot monitoring of the young solar analogue V889 Herculis
Context. Starspots are important manifestations of stellar magnetic activity. By studying their behaviour in young solar analogues, we can unravel the properties of their magnetic cycles. This gives
A spectroscopic survey of the youngest field stars in the solar neighbourhood
Aims. We present the first results of an ambitious ground-based observation programme conducted on 1–4 m class telescopes. Our sample consists of 1097 active and presumably young stars, all of them
...
1
2
3
...

References

SHOWING 1-10 OF 58 REFERENCES
The young active star SAO 51891 (V383 Lacertae)
Aims. The aim of this work is to investigate the surface inhomogeneities of a young, late-type star, SAO 51891, at different atmospheric levels, from the photosphere to the upper chromosphere,
Magnetic activity on V889 Herculis - Combining photometry and spectroscopy
Aims. In this paper we analyse photometric and spectroscopic observations of the young active dwarf V889 Her. We present new surface temperature maps, and compare them to earlier published Doppler
Surface differential rotation and photospheric magnetic field of the young solar-type star HD 171488 (V889 Her)
[Abstract]: We present spectropolarimetric observations of the young, single early G-dwarf HD 171488. These observations were obtained over a five-night period in 2004 September at the 3.9-m
The CaII infrared triplet as a stellar activity diagnostic - II. Test and calibration with high resolution observations
Aims. We report on our analysis of the high resolution spectra (R ≈ 86 000) of a sample of 42 late-type active stars (with measured logRspanning from ≈− 3t o≈−5) acquired with the Italian 3.6 m
Doppler imaging of stellar surface structure. XXI. The rapidly-rotating solar-type star HD 171488 = V889 Hercules
We present the first Doppler image of the single G0-dwarf HD 171488. As a 30-Myr young field star with a lithium abundance of  ≈ 140-times that of the Sun and a rotation 20 times faster, it is hardly
Newly discovered active binaries in the RasTyc sample of stellar X-ray sources. I. Orbital and physi
We present the first results from follow-up optical observations, both photometric and spectroscopic, of stellar X-ray sources, selected from theRasTyc sample, resulting from the cross-correlation of
Photospheric and Chromospheric Active Regions in Four Young Solar-Type Stars*
We present a photometric and spectroscopic study of four G-K dwarfs, namely HD 166, Eri, ?1 Ori, and ?1 Cet. In three cases, we find a clear spatial association between photospheric and chromospheric
High levels of surface differential rotation on the young G0 dwarf HD 171488
We present high-resolution images of the young, rapidly rotating G0 dwarf HD 171488, using both Stokes I and Stokes V data. The observations were secured with the MuSiCoS spectropolarimeter at
Fast-rotating nearby solar-type stars - I. Spectral classification, v sin i, Li abundances and X-ray luminosities
We present the results of high-resolution spectroscopic and high-precision photometric observations on a sample of 129 late-F and G-type nearby stars selected on the basis of their large rotational
On the relative residual intensities of the calcium H and K lines
We have observed the solar Caii H and K lines to obtain well-calibrated ratios of their core residual intensities. From three independent calibrations, one using a standard lamp, we conclude that the
...
1
2
3
4
5
...