Measurement of the Surface Gravity of $η$ Boo
| dc.creator | van Belle, Gerard T. | |
| dc.creator | Ciardi, David R. | |
| dc.creator | Boden, Andrew F. | |
| dc.date | 2007-01-05 | |
| dc.date.accessioned | 2026-07-07T10:21:23Z | |
| dc.date.available | 2026-07-07T10:21:23Z | |
| dc.description | Direct angular size measurements of the G0IV subgiant $η$ Boo from the Palomar Testbed Interferometer are presented, with limb-darkened angular size of $θ_{LD}= 2.1894^{+0.0055}_{-0.0140} $ mas, which indicate a linear radius of $R=2.672 \pm 0.028 R_\odot$. A bolometric flux estimate of $F_{BOL} = 22.1 \pm 0.28\times 10^{-7}$ erg cm$^{-2}$s$^{-1}$ is computed, which indicates an effective temperature of $T_{EFF}=6100 \pm 28$ K and luminosity of $L = 8.89 \pm 0.16 L_\odot$ for this object. Similar data are established for a check star, HD 121860. The $η$ Boo results are compared to, and confirm, similar parameters established by the {\it MOST} asteroseismology satellite. In conjunction with the mass estimate from the {\it MOST} investigation, a surface gravity of $\log g=3.817 \pm 0.016$ [cm s$^{-2}$] is established for $η$ Boo. | |
| dc.description | To appear in March 1, 2007 ApJ v657 n1 | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0701120 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0701120 | |
| dc.identifier | Astrophys.J.657:1058-1063,2007 | |
| dc.identifier | doi:10.1086/510830 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/175156 | |
| dc.subject | Astrophysics | |
| dc.title | Measurement of the Surface Gravity of $η$ Boo | |
| dc.type | text |