SIMBAD references

2015AJ....149..183H - Astron. J., 149, 183 (2015/June-0)

Cepheid variables in the maser-host galaxy NGC 4258.


Abstract (from CDS):

We present results of a ground-based survey for Cepheid variables in NGC 4258. This galaxy plays a key role in the Extragalactic Distance Scale due to its very precise and accurate distance determination via very long baseline interferometry observations of water masers. We imaged two fields within this galaxy using the Gemini North telescope and the Gemini Multi-Object Spectrograph, obtaining 16 epochs of data in the Sloan Digital Sky Survey gri bands over 4 yr. We carried out point-spread function photometry and detected 94 Cepheids with periods between 7 and 127 days, as well as an additional 215 variables which may be Cepheids or Population II pulsators. We used the Cepheid sample to test the absolute calibration of theoretical gri Period-Luminosity relations and found good agreement with the maser distance to this galaxy. The expected data products from the Large Synoptic Survey Telescope should enable Cepheid searches out to at least 10 Mpc.

Abstract Copyright:

Journal keyword(s): distance scale - galaxies: individual: NGC 4258 - stars: variables: Cepheids

VizieR on-line data: <Available at CDS (J/AJ/149/183): table3.dat table6.dat table7.dat table8.dat>

Nomenclature: Fig. 6, Table 6: [HM2015] CNNN (Nos C001-C094). Fig. 6, Table 7: [HM2015] VNNN (Nos V001-V215).

Simbad objects: 176

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