The DOI matches its Crossref record; 39 of the 39 references it cites were found in a registry or an index.
Hubble Space Telescope Fine Guidance Sensor Parallaxes of Galactic Cepheid Variable Stars: Period-Luminosity Relations
Open accessAbstract
We present new absolute trigonometric parallaxes and relative proper motions for nine Galactic Cepheid variable stars: ℓ Car, ζ Gem, β Dor, W Sgr, X Sgr, Y Sgr, FF Aql, T Vul, and RT Aur. We obtain these results with astrometric data from Fine Guidance Sensor 1r, a white-light interferometer on the Hubble Space Telescope . We find absolute parallaxes in milliarcseconds: ℓ Car, 2.01 ± 0.20 mas; ζ Gem, 2.78 ± 0.18 mas; β Dor, 3.14 ± 0.16 mas; W Sgr, 2.28 ± 0.20 mas; X Sgr, 3.00 ± 0.18 mas; Y Sgr, 2.13 ± 0.29 mas; FF Aql, 2.81 ± 0.18 mas; T Vul, 1.90 ± 0.23 mas; and RT Aur, 2.40 ± 0.19 mas; average σ π /π = 8%. Two stars (FF Aql and W Sgr) required the inclusion of binary astrometric perturbations, providing Cepheid mass estimates. With these parallaxes we compute absolute magnitudes in V , I , K , and Wesenheit W VI bandpasses, corrected for interstellar extinction and Lutz-Kelker-Hanson bias. Adding our previous absolute magnitude determination for δ Cep, we construct period-luminosity relations (PLRs) for 10 Galactic Cepheids. We compare our new PLRs with those adopted by several recent investigations, including the Freedman and Sandage H 0 projects. Adopting our PLR would tend to increase the Sandage H 0 value, but leave the Freedman H 0 unchanged. Comparing our Galactic Cepheid PLR with those derived from LMC Cepheids, we find the slopes for K and W VI to be identical in the two galaxies within their respective errors. Our data lead to a W VI distance modulus for the LMC m - M = 18.50 ± 0.03, uncorrected for any metallicity effects. Applying recently derived metallicity corrections yields a corrected LMC distance modulus of ( m - M ) 0 = 18.40 ± 0.05. Comparing our PLR to solar-metallicity Cepheids in NGC 4258 results in a distance modulus 29.28 ± 0.08 that agrees with one derived from maser studies.
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Cites
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Self-citationGaia Data Release 2: Catalogue validation
Arenou, F., Luri, X., Babusiaux, C., Fabricius, C., Helmi, A., Muraveva, T., Robin, A. C., Spoto, F., Vallenari, A., Antoja, T., et al. (2018) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201833234 · Cited by 601
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Metadata
- Authors
- Benedict, G. F., McArthur, B. E., Feast, M. W., Barnes, T. G., Harrison, T. E., Patterson, R. J., Menzies, J. W., Bean, J. L., & Freedman, W. L.
- Venue
- The Astronomical Journal
- Publisher
- American Astronomical Society
- Published
- 2007-03-15
- Volume
- 133
- Issue
- 4
- Pages
- 1810-1827
- ISSN
- 0004-6256 (ISSN-L)
- 1538-3881
- OpenAlex
- W1994328808
- Cited by
- 364
- References
- 39
- FWCI
- 14.49
- Type
- journal article
- Language
- en
- Open access
- bronze
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