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\input ibvs2.sty

\begin{document}
\IBVShead{5003}{12 December 2000}

\IBVStitle{On the Variability of F1--F9 Luminosity Class III--V Stars}

\IBVSauth{Adelman, S.J.; Coursey, B.C.; Harris, E.A.}

\IBVSinsto{Department of Physics, The Citadel, 171 Moultrie Street,
Charleston, SC 29409, USA\\ \indent email: adelmans@citadel.edu, courseyb@citadel.edu, harrise@citadel.edu}

\IBVStyp{ F }
\IBVSkey{photometry}
\IBVSabs{Hipparcos Satellite photometry of F1-F9 luminosity class III-V stars}
\IBVSabs{indicates that most are not particularly variable. A few}
\IBVSabs{stars for which further study is desirable are identified.}

\begintext

This paper considers Hipparcos photometry (ESA 1997) of luminosity class III--V 
F1--F9 stars from the Bright Star Catalogue, 5th edition (Hoffleit \& Warren 
1991) and the Supplement, 4th edition (Hoffleit et al.\ 1983). These stars 
include $\alpha^{2}$ CVn stars, $\delta$ Sct pulsators, eclipsing binaries, 
irregular variables, microvariables, RS CVn stars, SX Phe stars, periodic 
variables of unspecified types, unresolved variables, and constant stars. 
Table 1 lists the mean amplitudes, which indicate the mean variability, 
of spectral types with at least 3 class members. We omit stars with spurious 
variability due to duplicity. The Hipparcos photometry does not confirm the 
reported variability of some stars which might indicate a change in their 
stellar behavior or reflect the quality of the previous photometry. 

Table 2 (available electronically from the IBVS site as 5003-t2.tex and
5003-t2.txt) contains the individual star information including those
of stars not used in compiling the means. For each star it lists the HR
number (if any), names (Bayer, Flamsteed, and/or variable star
designation), the $V$ magnitude from the Bright Star Catalog or its
Supplement, the spectral type, the Hipparcos number, the standard error
(mag), the amplitude (mag), and comments (type of variable and the
NSV number if there was not space in the Names column). The F stars
are not particularly variable with their means being similar to those
of B6--B9 III stars (Adelman, Gentry, \& Sudiana 2000), A0--A2 III--V
stars (Adelman, Flores, \& Patel 2000), A3--A7 III and A3--F0 IV stars
(Adelman 2000a), G0--G9 stars (Adelman, Davis \& Lee 2000), and K0--K4
III stars (Adelman 2000b). The luminosity III star variability is
consistent with the trends seen in the F supergiants (Adelman, Cay,
Cay, \& Kocer 2000).

\IBVSedata{5003-t2.txt}

\IBVSetable{5003-t2.tex}


Table 3 lists stars with amplitudes of 0.04--0.08 mag. Some are
well-known variables while others are in need of additional
observations. As a 0\fmm07 amplitude found for Procyon is
questionable, this star was omitted. Those with amplitudes greater than
0\fmm08 are usually well-known variables: the irregular variable
V1401 Aql (F1III, 0.21); the $\delta$~Sct stars $\gamma^{2}$~Cae
(F1III, 0.09), $\delta$~Sct (F2IIIp, 0.17), 1 V474 Mon (F2IV, 0.31),
and 44 IM Tau (F2IV--V, 0.10); the Algol systems MX Hya (F2IV, 0.49), R
CMa (F1V, 0.40), and V1143 Cyg (F6Va, 0.11); the W UMa stars
$\varepsilon$~CrA (F2V, 0.26), CN Hyi (F6V, 0.26), and 44 Boo (F9--G1Vn,
0.15); the SX Phe star AI Vel (F2V, 0.57); the $\beta$ Lyr type stars
$\kappa^{1}$~BG~Ind (F3V,0.21) and V2388 Oph (F5Vn, 0.30); and the
$\alpha^{2}$ CVn star DW Eri (F4IIIpSr, 0.09). HD 134646 (F4III, 0.09)
and HD 81734 (F7V, 0.17) are unresolved variables while $\iota$~TrA
(F4IV, 0.09) and HR 6844 (F2V, 0.11) are periodic variables.

{\it Acknowledgements.}
SJA wishes to thank the Citadel Development Foundation for their support. 
Cadets Coursey and Harris are US Navy ROTC scholarship recipients.

\newpage

\begin{center}
{\normalsize Table 1: The mean amplitudes of various types of F1 through F9 stars}
\vskip 2mm
\begin{tabular}{lccl@{}}
\hline
Spectral & \lower6pt\hbox{Number} & Mean ampl. & \lower6pt\hbox{Comment} \\[-3pt]
class & & (mag) \\
\hline
F1III & 16 & 0.041${}\pm{}$0.049 & 0.023${}\pm{}$0.008 without 3 stars\\
F2III & 26 & 0.030${}\pm{}$0.031 & 0.021${}\pm{}$0.005 without 4 stars\\ 
F3III & 13 & 0.022${}\pm{}$0.006 & \\
F4III & 15 & 0.039${}\pm{}$0.024 & 0.028${}\pm{}$0.008 without 3 stars\\
F5III & 23 & 0.024${}\pm{}$0.014 & 0.021${}\pm{}$0.008 without V784 Cas\\
F6III & 11 & 0.025${}\pm{}$0.007 &\\
F7III & 3 & 0.040${}\pm{}$0.017 & HR 8269's amplitude 0.06\\
F8III & 4 & 0.022${}\pm{}$0.005 & \\
F1III--IV & 10 & 0.024${}\pm{}$0.014 & 0.020${}\pm{}$0.007 without BZ Gru\\
F2III--IV & 9 & 0.027${}\pm{}$0.013 &\\
F3III--IV & 9 & 0.027${}\pm{}$0.017 & 0.021${}\pm{}$0.006 without AL CVn\\
F5III--IV & 3 & 0.020${}\pm{}$0.000 &\\
F6III--IV & 4 & 0.025${}\pm{}$0.010 & \\
F7III--IV & 3 & 0.023${}\pm{}$0.006 & \\
F1IV & 17 & 0.028${}\pm{}$0.011 & \\
F2IV & 20 & 0.055${}\pm{}$0.110 & 0.023${}\pm{}$0.013 without 1 Mon \& MX Hya\\
F3IV & 20 & 0.024${}\pm{}$0.008 & \\
F4IV & 15 & 0.029${}\pm{}$0.022 & 0.022${}\pm{}$0.07 without $\iota$~Leo \& $\iota$~TrA\\ 
F5IV & 31 & 0.025${}\pm{}$0.008 & \\
F6IV & 20 & 0.022${}\pm{}$0.005 & \\
F7IV & 12 & 0.026${}\pm{}$0.009 & \\
F8IV & 8 & 0.025${}\pm{}$0.005 & \\
F9IV & 3 & 0.020${}\pm{}$0.000 &\\
F2IV--V & 7 & 0.044${}\pm{}$0.025 & 0.035${}\pm{}$0.005 without IM Tau\\
F3IV--V & 9 & 0.029${}\pm{}$0.008 & \\ 
F4IV--V & 5 & 0.026${}\pm{}$0.005 & \\
F5IV--V & 9 & 0.028${}\pm{}$0.018 & \\
F6IV--V & 8 & 0.022${}\pm{}$0.007 & \\
F7IV--V & 5 & 0.026${}\pm{}$0.005 & \\
F8IV--V & 3 & 0.023${}\pm{}$0.006 & \\
F1V & 21 & 0.043${}\pm{}$0.082 & 0.026${}\pm{}$0.010 without R CMa\\ 
F2V & 54 & 0.042${}\pm{}$0.081 & 0.026${}\pm{}$0.010 without AI Vel, HR 6844, \& $\varepsilon$~CrA\\
F2.5V & 4 & 0.025${}\pm{}$0.010 & \\ 
F3V & 39 & 0.030${}\pm{}$0.031 & 0.024${}\pm{}$0.006 without HR 3936 \& BG Ind\\
F4V & 40 & 0.023${}\pm{}$0.006 & \\
F5V & 85 & 0.026${}\pm{}$0.031 & 0.022${}\pm{}$0.007 without AR Dor \& V2388 Oph\\
F5--6V & 3 & 0.023${}\pm{}$0.006 & \\
F6V & 80 & 0.021${}\pm{}$0.029 & 0.007${}\pm{}$0.031 without CN Hyi \& V1143 Cyg\\
F6--7V & 4 & 0.028${}\pm{}$0.005 &\\
F7V & 80 & 0.027${}\pm{}$0.018 & 0.025${}\pm{}$0.008 without HD 81734\\
F8V & 75 & 0.026${}\pm{}$0.008 &\\
F9V & 31 & 0.025${}\pm{}$0.013 &\\
\hline
\end{tabular}
\end{center}

\newpage

\begin{center}
{\normalsize Table 3: F stars with amplitudes of 0.04--0.08 magnitudes}
\vskip2mm
\begin{tabular}{lrlrccl}
\hline
\lower6pt\hbox{Name} & HD & Spectral & HIP & SE & Amp. & \lower6pt\hbox{Comments} \\[-3pt]
& number & type & number & (mag) & (mag) & \\
\hline
CG Gru & 214441 & F1III & 111833 & 0.0017 & 0.06 & DSCT\\
BB Phe & 2724 & F2III & 2388 & 0.0015 & 0.05 & DSCT\\
$\rho$~Phe& 4919 & F2III & 3949 & 0.0024 & 0.07 & DSCT\\
LT Vul & 177392 & F2III & 93603 & 0.0010 & 0.04 & DSCT\\
$\gamma$~Dor&27290 & F4III & 19893 & 0.0020 & 0.07 & EW\\
HR 3325 & 71433 & F4III & 41452 & 0.0010 & 0.04 & \\
V947 Cen & 113537 & F4III & 63849 & 0.0028 & 0.04 & P\\
HR 5817 & 139478 & F4IIIp & 76384 & 0.0016 & 0.04 & \\
V784 Cas & 13122 & F5III & 10141 & 0.0041 & 0.08 & DSCT \\
 & 33924 & F5III & 24658 & 0.0012 & 0.04 & \\
HR 8269 & 205877 & F7III & 106978 & 0.0009 & 0.06 & U\\
BZ Gru & 208435 & F1III--IV & 108347 & 0.0018 & 0.06 & DSCT\\
11~$\beta$~Cas& 432 & F2III--IV & 746 & 0.0017 & 0.04 & DSCT\\
54 Hya & 129926 & F2III--IV & 72197 & 0.0013 & 0.05 & U\\
4 AL CVn & 107904 & F3III--IV & 60467 & 0.0017 & 0.07 & DSCT\\
HR 6890 & 169268 & F6III--IV & 90174 & 0.0010 & 0.04 & \\
NSV 488 & 8391 & F0/2IV & 6418 & 0.0013 & 0.05 & U\\
HR 4803 & 109799 & F1IV & 61621 & 0.0021 & 0.04 & U\\
DK Vir & 115308 & F1IV & 64769 & 0.0015 & 0.04 & DSCT\\
HR 5079 & 117281 & F1IV & 65698 & 0.0014 & 0.04 & \\
 & 159340 & F0/2IV & 86119 & 0.0012 & 0.04 & \\
 & 189307 & F2IV & 98577 & 0.0013 & 0.04 & \\
QQ Tel & 185139 & F2IV & 96721 & 0.0035 & 0.07 & DSCT\\
 & 87638 & F3IV & 49434 & 0.0010 & 0.04 & \\
 & 207826 & F3IV & 107710 & 0.0045 & 0.04 & \\
78~$\iota$~Leo&99028& F4IV & 55642 & 0.0007 & 0.07 & SV\\
 & 85821 & F5IV & 48483 & 0.0011 & 0.04 & \\
HR 5537 & 131040 & F5IV & 72508 & 0.0052 & 0.04 & MV\\
HR 6375 & 155078 & F5IV & 83962 & 0.0005 & 0.04 & \\
HR 8363 & 208177 & F5IV & 108144 & 0.0064 & 0.04 & \\
HR 2072 & 39937 & F7IV & 27737 & 0.0014 & 0.05 & \\
ZZ Boo & 121648 & F2IV/V+F2Iv/V & 68064 & 0.0011 & 0.04 & EA/DM\\
 & 140130 & F2IV/V & 77067 & 0.0016 & 0.04 & \\
HR 8945 & 221740 & F2IV--V & 116399 & 0.0009 & 0.04 & \\
 & 135208 & F3IV/V & 74593 & 0.0010 & 0.04 & \\
HR 5766 & 138498 & F3IV--V & 76407 & 0.0007 & 0.04 & \\
26 Cet & 6288 & F1V & 4979 & 0.0022 & 0.04 & MV\\
HR 6849 & 168092 & F1V & 89401 & 0.0014 & 0.04 & \\
39 Peg & 213617 & F1V & 111278 & 0.0018 & 0.05 & U\\
HR 1470 & 29364 & F2V: & 21619 & 0.0016 & 0.04 & NSV 1676\\
HR 2384 & 46273 & F2V & 30953 & 0.0009 & 0.04 & U\\
HR 4686 & 107192 & F2V & 59767 & 0.0017 & 0.05 & P\\
KQ Lup & 137785 & F2V & 75818 & 0.0020 & 0.05 & E\\
V949 Sco & 158741 & F2V & 85839 & 0.0022 & 0.04 & DSCT\\
\hline
\end{tabular}
\end{center}

\newpage

\begin{center}
{\normalsize Table 3 (cont.)}
\vskip2mm
\begin{tabular}{lrlrccl}
\hline
\lower6pt\hbox{Name} & HD & Spectral & HIP & SE & Amp. & \lower6pt\hbox{Comments} \\[-3pt]
& number & type & number & (mag) & (mag) & \\
\hline
HR 6786 & 166114 & F2V & 89099 & 0.0011 & 0.04 & U\\
NZ Peg & 206043 & F2V & 106897 & 0.0018 & 0.06 & DSCT\\
HR 9106 & 225233 & F2V & 357 & 0.0010 & 0.04 & \\
HR 3874 & 84447 & F2--3V & 47762 & 0.0012 & 0.04 & \\
HR 3936 & 86358 & F3V & 48895 & 0.0022 & 0.07 & I\\
HR 8507 & 211575 & F3V & 110091 & 0.0014 & 0.04 & \\
HR 673 & 14221 & F4V & 10830 & 0.0013 & 0.04 & \\
AR Dor & 34349 & F5V & 24221 & 0.0010 & 0.08 & E:\\
 & 172416 & F5V & 91732 & 0.0021 & 0.04 & U\\
 & 184151 & F5V & 96081 & 0.0007 & 0.04 & \\
NSV 1614 & 28406 & F6V & 20948 & 0.0016 & 0.04 & \\
 & 152923AB& F6V & 83174 & 0.0012 & 0.05 & \\
 & 102357 & F7V & 57488 & 0.0019 & 0.05 & MV\\
HR 4533 & 102634 & F7V & 57629 & 0.0013 & 0.05 & U\\
HR 5779 & 138763 & F7V & 76233 & 0.0020 & 0.04 & U\\
$\rho$~Tel& 177171 & F7V & 93815 & 0.0014 & 0.04 & U\\
HR 8843 & 219482 & F7V & 114948 & 0.0010 & 0.04 & MV\\
HR 1179 & 23856 & F8V & 17689 & 0.0008 & 0.04 & \\ 
111 V1119 Tau & 35296 & F8V & 25278 & 0.0014 & 0.04 & P\\
 & 63008 & F8V & 37718 & 0.0011 & 0.04 & \\
17 Vir & 107705 & F8V & 60353 & 0.0186 & 0.04 & \\
 & 116156 & F8V & 65159 & 0.0009 & 0.04 & \\
HR 5148 & 119124 & F7--9V & 66704 & 0.0012 & 0.04 & U\\
 & 128563 & F8V & 71510 & 0.0018 & 0.04 & \\
HR 5583 & 132375 & F8V & 73309 & 0.0013 & 0.04 & \\
 & 157466 & F8V & 85007 & 0.0007 & 0.04 & \\
 & 108147 & F9V & 60644 & 0.0010 & 0.04 & \\
 & 112196 & F9V & 63008 & 0.0022 & 0.04 & U\\
V819 Her & 157482 & F9Vn: & 84949 & 0.0009 & 0.08 & EA\\
DL Eri & 24832 & F1V & 18455 & 0.0021 & 0.04 & DSCT\\
\hline
\end{tabular}
\end{center}

\references

Adelman, S. J., 2000a, {\it IBVS}, No.\ 4969

Adelman, S. J., 2000b, {\it IBVS}, No.\ 4958

Adelman, S. J., Cay, I. H., Cay, M. T., Kocer, D., 2000, {\it IBVS}, No.\ 4947

Adelman, S. J., Davis, J. M., Lee, A. S., 2000, {\it IBVS}, No.\ 4993

Adelman, S. J., Flores, R. S. C., Jr., Patel, V., 2000, {\it IBVS}, No.\ 4984

Adelman, S. J., Gentry, M. L., Sudiana, I. M., 2000, {\it IBVS}, No.\ 4968

ESA, 1997, {\it The Hipparcos and Tycho Catalogs}, SP-1200

Hoffleit, D., Warren, W. H., Jr., 1991, {\it The Bright Star Catalogue}, 5th 
Rev.\ Ed., ADC Selected Astronomical Catalogs, Vol.\ 1, NASA Goddard Space 
Flight Center

Hoffleit, D., Saladyga, P., Wlasuk, P., 1983, {\it A Supplement to the Bright 
Star Catalogue}, Yale University Observatory, New Haven, CT

\end{document}

