Peremennye Zvezdy

Article in PDF
"Peremennye Zvezdy",
Prilozhenie
,
vol. 8, N 5 (2008)

Four New SX Phoenicis Variable Stars

A. V. Khruslov
Russia, Tula

ISSN 2221–0474

Received:   9.02.2008;   accepted:   11.02.2008
(E-mail for contact: khruslov@bk.ru)


#NameOtherCoord (J2000)TypeMaxMinSystemPeriodEpoch (JD)typeSpCommentL.CurveFind.ChartData
1 TYC 2304 00992 101 22 59.81, +36 28 16.7SXPHE12.813.05R0.0896132451481.805max Comm. 11.PNGchart1.PNGNSVS 6443401
2 GSC 2301-0116801 31 49.24, +35 13 23.7SXPHE14.515.1R0.0689832451477.967max Comm. 22.PNGchart2.PNGNSVS 6450679 NSVS 6462670
3 GSC 2815-0079001 44 27.96, +37 58 53.7SXPHE12.913.5R0.106942451469.948max Comm. 33.PNGchart3.PNGNSVS 3844113 NSVS 6459386 NSVS 6472319
4 GSC 4537-0051106 15 20.90, +82 08 13.4SXPHE13.714.1R0.0774932451483.966max Comm. 44.PNGchart4.PNGNSVS 85082 NSVS 110704 NSVS 585617 NSVS 633402

Comments:


1. M-m = 0.35, B-V = -0.253 (Tycho2) is possibly erroneous, the star is too faint for this catalog. J-H = 0.136 (2MASS).

2. M-m = 0.3:, J-H = 0.168 (2MASS). The ROTSE data with photometric correction flags (usually rejected) were kept for the analysis.

3. M-m = 0.25, J-H = 0.065 (2MASS). The ROTSE data with photometric correction flags (usually rejected) were kept for the analysis.

4. M-m = 0.3, J-H = 0.120 (2MASS).

Remarks:
I present the discovery of 4 new High-Amplitude Delta Scuti stars (HADS). Their large distances from the galactic plane make it possible to consider them SX Phoenicis variables. My search for variables was carried out in the publicly available data of the Northern Sky Variability Survey (NSVS, Wozniak et al., 2004, also see http://skydot.lanl.gov/nsvs). These observations were analyzed using the period-search software developed by Dr. V.P. Goranskij for Windows environment. The coordinates are from the 2MASS catalog.

References:
Wozniak, P.R., Vestrand, W.T., Akerlof, C.W. et al., 2004, Astron. J., 127, 2436



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