Characterization of the VVV Survey RR Lyrae Population across the Southern Galactic Plane

Dante Minniti, Istvan Dékány, Daniel Majaess, Tali Palma, Joyce Pullen, Marina Rejkuba, Javier Alonso-García, Marcio Catelan, Rodrigo Contreras Ramos, Oscar A. Gonzalez, Maren Hempel, Mike Irwin, Philip W. Lucas, Roberto K. Saito, Patricia Tissera, Elena Valenti, Manuela Zoccali

Resultado de la investigación: Article

16 Citas (Scopus)

Resumen

Deep near-IR images from the VISTA Variables in the Vía Láctea (VVV) Survey were used to search for RR Lyrae stars in the Southern Galactic plane. A sizable sample of 404 RR Lyrae of type ab stars was identified across a thin slice of the fourth Galactic quadrant (295° < ℓ < 350°, -2.°24 < b < -1.°05). The sample's distance distribution exhibits a maximum density that occurs at the bulge tangent point, which implies that this primarily Oosterhoff type I population of RRab stars does not trace the bar delineated by their red clump counterparts. The bulge RR Lyrae population does not extend beyond ℓ ∼ 340°, and the sample's spatial distribution presents evidence of density enhancements and substructure that warrants further investigation. Indeed, the sample may be employed to evaluate Galactic evolution models, and is particularly lucrative since half of the discovered RR Lyrae are within reach of Gaia astrometric observations.

Idioma originalEnglish
Número de artículo179
PublicaciónAstronomical Journal
Volumen153
N.º4
DOI
EstadoPublished - 1 abr 2017

Huella dactilar

stars
spatial distribution
quadrants
galactic evolution
clumps
substructures
tangents
augmentation
distribution

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Minniti, D., Dékány, I., Majaess, D., Palma, T., Pullen, J., Rejkuba, M., ... Zoccali, M. (2017). Characterization of the VVV Survey RR Lyrae Population across the Southern Galactic Plane. Astronomical Journal, 153(4), [179]. https://doi.org/10.3847/1538-3881/aa5be4
Minniti, Dante ; Dékány, Istvan ; Majaess, Daniel ; Palma, Tali ; Pullen, Joyce ; Rejkuba, Marina ; Alonso-García, Javier ; Catelan, Marcio ; Contreras Ramos, Rodrigo ; Gonzalez, Oscar A. ; Hempel, Maren ; Irwin, Mike ; Lucas, Philip W. ; Saito, Roberto K. ; Tissera, Patricia ; Valenti, Elena ; Zoccali, Manuela. / Characterization of the VVV Survey RR Lyrae Population across the Southern Galactic Plane. En: Astronomical Journal. 2017 ; Vol. 153, N.º 4.
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title = "Characterization of the VVV Survey RR Lyrae Population across the Southern Galactic Plane",
abstract = "Deep near-IR images from the VISTA Variables in the V{\'i}a L{\'a}ctea (VVV) Survey were used to search for RR Lyrae stars in the Southern Galactic plane. A sizable sample of 404 RR Lyrae of type ab stars was identified across a thin slice of the fourth Galactic quadrant (295° < ℓ < 350°, -2.°24 < b < -1.°05). The sample's distance distribution exhibits a maximum density that occurs at the bulge tangent point, which implies that this primarily Oosterhoff type I population of RRab stars does not trace the bar delineated by their red clump counterparts. The bulge RR Lyrae population does not extend beyond ℓ ∼ 340°, and the sample's spatial distribution presents evidence of density enhancements and substructure that warrants further investigation. Indeed, the sample may be employed to evaluate Galactic evolution models, and is particularly lucrative since half of the discovered RR Lyrae are within reach of Gaia astrometric observations.",
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Minniti, D, Dékány, I, Majaess, D, Palma, T, Pullen, J, Rejkuba, M, Alonso-García, J, Catelan, M, Contreras Ramos, R, Gonzalez, OA, Hempel, M, Irwin, M, Lucas, PW, Saito, RK, Tissera, P, Valenti, E & Zoccali, M 2017, 'Characterization of the VVV Survey RR Lyrae Population across the Southern Galactic Plane', Astronomical Journal, vol. 153, n.º 4, 179. https://doi.org/10.3847/1538-3881/aa5be4

Characterization of the VVV Survey RR Lyrae Population across the Southern Galactic Plane. / Minniti, Dante; Dékány, Istvan; Majaess, Daniel; Palma, Tali; Pullen, Joyce; Rejkuba, Marina; Alonso-García, Javier; Catelan, Marcio; Contreras Ramos, Rodrigo; Gonzalez, Oscar A.; Hempel, Maren; Irwin, Mike; Lucas, Philip W.; Saito, Roberto K.; Tissera, Patricia; Valenti, Elena; Zoccali, Manuela.

En: Astronomical Journal, Vol. 153, N.º 4, 179, 01.04.2017.

Resultado de la investigación: Article

TY - JOUR

T1 - Characterization of the VVV Survey RR Lyrae Population across the Southern Galactic Plane

AU - Minniti, Dante

AU - Dékány, Istvan

AU - Majaess, Daniel

AU - Palma, Tali

AU - Pullen, Joyce

AU - Rejkuba, Marina

AU - Alonso-García, Javier

AU - Catelan, Marcio

AU - Contreras Ramos, Rodrigo

AU - Gonzalez, Oscar A.

AU - Hempel, Maren

AU - Irwin, Mike

AU - Lucas, Philip W.

AU - Saito, Roberto K.

AU - Tissera, Patricia

AU - Valenti, Elena

AU - Zoccali, Manuela

PY - 2017/4/1

Y1 - 2017/4/1

N2 - Deep near-IR images from the VISTA Variables in the Vía Láctea (VVV) Survey were used to search for RR Lyrae stars in the Southern Galactic plane. A sizable sample of 404 RR Lyrae of type ab stars was identified across a thin slice of the fourth Galactic quadrant (295° < ℓ < 350°, -2.°24 < b < -1.°05). The sample's distance distribution exhibits a maximum density that occurs at the bulge tangent point, which implies that this primarily Oosterhoff type I population of RRab stars does not trace the bar delineated by their red clump counterparts. The bulge RR Lyrae population does not extend beyond ℓ ∼ 340°, and the sample's spatial distribution presents evidence of density enhancements and substructure that warrants further investigation. Indeed, the sample may be employed to evaluate Galactic evolution models, and is particularly lucrative since half of the discovered RR Lyrae are within reach of Gaia astrometric observations.

AB - Deep near-IR images from the VISTA Variables in the Vía Láctea (VVV) Survey were used to search for RR Lyrae stars in the Southern Galactic plane. A sizable sample of 404 RR Lyrae of type ab stars was identified across a thin slice of the fourth Galactic quadrant (295° < ℓ < 350°, -2.°24 < b < -1.°05). The sample's distance distribution exhibits a maximum density that occurs at the bulge tangent point, which implies that this primarily Oosterhoff type I population of RRab stars does not trace the bar delineated by their red clump counterparts. The bulge RR Lyrae population does not extend beyond ℓ ∼ 340°, and the sample's spatial distribution presents evidence of density enhancements and substructure that warrants further investigation. Indeed, the sample may be employed to evaluate Galactic evolution models, and is particularly lucrative since half of the discovered RR Lyrae are within reach of Gaia astrometric observations.

KW - Galaxy: structure

KW - stars: variables: RR Lyrae

KW - surveys

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DO - 10.3847/1538-3881/aa5be4

M3 - Article

AN - SCOPUS:85017309546

VL - 153

JO - Astronomical Journal

JF - Astronomical Journal

SN - 0004-6256

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