2019A&A...627A..52K


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.07CEST00:27:22

2019A&A...627A..52K - Astronomy and Astrophysics, volume 627A, 52-52 (2019/7-1)

Magnetic activity of the young solar analog V1358 Orinis.

KRISKOVICS L., KOVARI Z., VIDA K., OLAH K., CARROLL T.A. and GRANZER T.

Abstract (from CDS):

Context. Young, fast-rotating single stars can show dramatically different magnetic signatures and levels of magnetic activity as compared with the Sun. While losing angular momentum due to magnetic breaking and mass loss through stellar winds, the stars gradually spin down resulting in decreasing levels of activity. Studying magnetic activity on such solar analogues plays a key role in understanding the evolution of solar-like stars and allows a glimpse into the past of the Sun as well. Aims. In order to widen our knowledge of the magnetic evolution of the Sun and solar-like stars, magnetic activity of the young solar analog V1358 Ori is investigated. Methods. Fourier analysis of long-term photometric data is used to derive rotational period and activity cycle length, while spectral synthesis is applied to high-resolution spectroscopic data in order to derive precise astrophysical parameters. Doppler imaging is performed to recover surface-temperature maps for two subsequent intervals. Cross-correlation of the consecutive Doppler maps is used to derive surface differential rotation. The rotational modulation of the chromospheric activity indicators is also investigated. Results. An activity cycle of ∼1600 days is detected for V1358 Ori. Doppler imaging revealed a surface-temperature distribution dominated by a large polar cap with a few weaker features around the equator. This spot configuration is similar to other maps of young solar analogs from the literature, and supports recent model predictions. We detected solar-like surface differential rotation with a surface shear parameter of α=0.016±0.010, which is in close agreement with our recently proposed empirical relation between rotation and differential rotation. The chromospheric activity indicators showed rotational modulation.

Abstract Copyright: © ESO 2019

Journal keyword(s): stars: activity - stars: imaging - starspots - stars: individual: V1358 Ori

Simbad objects: 12

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Number of rows : 12

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 HD 29615 PM* 04 38 43.9422102420 -27 02 01.805131424   9.08 8.47   7.79 G3V 49 0
2 V* AB Dor TT* 05 28 44.8916324761 -65 26 55.289846904 8.259 7.856 6.999 6.496 5.993 K0V 931 0
3 V* AH Lep BY* 05 34 09.1626094625 -15 17 03.184918816   9.08 8.363   7.649 G2V 37 0
4 NAME Columba Association As* 06 14.0 -40 03           ~ 205 0
5 V* V1358 Ori BY* 06 19 08.0574744469 -03 26 20.358775839   8.52 7.95     G0V 90 1
6 HD 44019 * 06 19 21.0630951961 -00 54 53.074590619   8.526 7.285     K1/2III 15 0
7 HD 44517 Pe* 06 22 02.4958121767 -05 27 17.018378880   8.55 8.06     F5V 26 0
8 HD 45215 PM* 06 26 09.5265175888 -03 30 56.595890669   7.46 6.43     K0III 8 0
9 V* LQ Hya BY* 09 32 25.5684079124 -11 11 04.687410738 9.316 8.761 7.891 7.288 6.815 K1Vp 401 0
10 V* V557 Car BY* 10 42 41.5159999215 -64 21 04.332236022   11.26 12.03     G2V 51 0
11 V* EK Dra BY* 14 39 00.2109485496 +64 17 29.977371998   8.243 7.604     G1.5V 377 0
12 V* V889 Her BY* 18 34 20.1030244573 +18 41 24.234582456   8.00 7.449   6.720 G2V 118 0

    Equat.    Gal    SGal    Ecl

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2020.08.07-00:27:22

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