Knowledge of the stellar content near the Sun is important for a broad range of topics ranging from the search for planets to the study of Milky Way (MW) structure. The most powerful method for identifying potentially nearby stars is proper motion (PM) surveys. All old optical surveys avoid, or a...
Kurtev, R.
,
Gromadzki, M.
,
Beamín, J.C.
,
Folkes, S.L.
,
Pena Ramirez, K.
,
Ivanov, V.D.
,
Borissova, J.
,
Villanueva, V.
,
Minniti, D.
,
Mendez, R.
,
Lucas, P.W.
,
Smith, L.C.
,
Pinfield, D.J.
,
Kuhn, M.A.
,
Jones, H.R.A.
,
Antonova, A.
,
Yip, A.K.P.
,
[VVV high proper motion stars – I. The catalogue of bright KS ≤ 13.5 stars]
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VVV high proper motion stars – I. The catalogue of bright KS ≤ 13.5 stars
Aims. The windows of low extinction in the Milky Way (MW) plane are rare but important because they enable us to place structural constraints on the opposite side of the Galaxy, which has hither to been done rarely. Methods. We use the near-infrared (near-IR) images of the VISTA Variables in the ...
Minniti, D.
,
Saito, R.K.
,
Gonzalez, O.A.
,
Alonso-García, J.
,
Rejkuba, M.
,
Barbá, R.
,
Irwin, M.
,
Kammers, R.
,
Lucas, P.W.
,
Majaess, D.
,
Valenti, E.
,
[A new near-IR window of low extinction in the Galactic plane]
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A new near-IR window of low extinction in the Galactic plane
Time-varying phenomena are one of the most substantial sources of astrophysical information, and their study has led to many fundamental discoveries in modern astronomy. We have developed an automated tool to search for and analyze variable sources in the near-infrared K s band using the data fro...
Medina, N.
,
Borissova, J.
,
Bayo, A.
,
Kurtev, R.
,
Navarro Molina, C.
,
Kuhn, M.
,
Kumar, N.
,
Lucas, P.W.
,
Catelan, M.
,
Minniti, D.
,
Smith, L.C.
,
[An Automated Tool to Detect Variable Sources in the Vista Variables in the Vía Láctea Survey: The VVV Variables (V4) Catalog of Tiles d001 and d002]
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An Automated Tool to Detect Variable Sources in the Vista Variables in the Vía Láctea Survey: The VVV Variables (V4) Catalog of Tiles d001 and d002
The 'VISTA Variables in the Vía Láctea eXtended (VVVX)' ESO Public Survey is a nearinfrared photometric sky survey that covers nearly 1700 deg2 towards the Galactic disc and bulge. It is well-suited to search for newopen clusters, hidden behind dust and gas. The pipeline processed and calibrated ...
Borissova, J.
,
Ivanov, V.D.
,
Lucas, P.W.
,
Kurtev, R.
,
Alonso-Garcia, J.
,
Ramírez Alegría, S.
,
Minniti, D.
,
Froebrich, D.
,
Hempel, M.
,
Medina, N.
,
Chené, A.-N.
,
Kuhn, M.A.
,
[New Galactic star clusters discovered in the disc area of the VVVX survey]
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New Galactic star clusters discovered in the disc area of the VVVX survey
Deep near-IR images from the VISTA Variables in the Via Lactea (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 degrees < l < 350 degrees, -...
Minniti, D.
,
Dékány, I.
,
Majaess, D.
,
Palma, T.
,
Pullen, J.
,
Rejkuba, M.
,
Alonso-García, J.
,
Catelan, M.
,
Contreras Ramos, R.
,
Gonzalez, O.A.
,
Hempel, M.
,
Irwin, M.l
,
Lucas, P.W.
,
Saito, R.K.
,
Tissera, P.
,
Valenti, E.
,
Zoccali, M.
,
[Characterization of the VVV Survey RR Lyrae Population across the Southern Galactic Plane]
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Characterization of the VVV Survey RR Lyrae Population across the Southern Galactic Plane
Context. The inner regions of the Galaxy are severely affected by extinction, which limits our capability to study the stellar populations present there. The Vista Variables in the Vía Láctea (VVV) ESO Public Survey has observed this zone at near-infrared wavelengths where reddening is highly dim...
Alonso-García, J.
,
Saito, R.K.
,
Hempel, M.
,
Minniti, D.
,
Pullen, J.
,
Catelan, M.
,
Ramos, R.C.
,
Cross, N.J.G.
,
Gonzalez, O.A.
,
Lucas, P.W.
,
Palma, T.
,
Valenti, E.
,
Zoccali, M.
,
[Milky Way demographics with the VVV survey: IV. PSF photometry from almost one billion stars in the Galactic bulge and adjacent southern disk]
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Milky Way demographics with the VVV survey: IV. PSF photometry from almost one billion stars in the Galactic bulge and adjacent southern disk
We report the discovery of an enigmatic large-amplitude (ΔKs >10.5 mag) transient event in near-IR data obtained by the VISTA Variables in the Via Lactea (VVV) ESO Public Survey. The object (designated VVV-WIT- 06) is located at R.A.=17:07:18.917, decl.=-39:06:26.45 (J2000), corresponding to Gala...
Minniti, D.
,
Saito, R.K.
,
Forster, F.
,
Pignata, G.
,
Ivanov, V.D.
,
Lucas, P.W.
,
Beamin, J.C.
,
Borissova, J.
,
Catelan, M.
,
Gonzalez, O.A.
,
Hempel, M.
,
Hsiao, E.
,
Kurtev, R.
,
Majaess, D.
,
Masetti, N.
,
Morrell, N.I.
,
Phillips, M.M.
,
Pullen, J.B.
,
Rejkuba, M.
,
Smith, L.
,
Surot, F.
,
Valenti, E.
,
Zoccali, M.
,
[The Emergence of the Infrared Transient VVV-WIT-06]
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The Emergence of the Infrared Transient VVV-WIT-06
We present the discovery of 816 high-amplitude infrared variable stars (ΔKs > 1 mag) in 119 deg2 of the Galactic mid-plane covered by the VISTA Variables in the Via Lactea (VVV) survey. Almost all are new discoveries and about 50 per cent are young stellar objects (YSOs). This provides further ev...
Contreras Peña, C.
,
Lucas, P.W.
,
Minniti, D.
,
Kurtev, R.
,
Stimson, W.
,
Navarro Molina, C.
,
Borissova, J.
,
Kumar, M.S.N.
,
Thompson, M.A.
,
Gledhill, T.
,
Terzi, R.
,
Froebrich, D.
,
Caratti o Garatti, A.
,
[A population of eruptive variable protostars in VVV]
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A population of eruptive variable protostars in VVV
In a companion work (Paper I), we detected a large population of highly variable Young Stellar Objects (YSOs) in the Vista Variables in the Via Lactea (VVV) survey, typically with class I or flat spectrum spectral energy distributions and diverse light-curve types. Here we present infrared spectr...
Contreras Peña, C.
,
Lucas, P.W.
,
Kurtev, R.
,
Minniti, D.
,
Caratti o Garatti, A.
,
Marocco, F.
,
Thompson, M.A.
,
Froebrich, D.
,
Kumar, M.
,
Stimson, W.
,
Navarro Molina, C.
,
Borissova, J.
,
Gledhill, T.
,
Terzi, R.
,
[Infrared spectroscopy of eruptive variable protostars from VVV]
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Infrared spectroscopy of eruptive variable protostars from VVV
Interstellar extinction toward the Galactic Center (GC) is large and significantly differential. Its reddening and dimming effects in red clump (RC) stars in the Galactic Bulge can be exploited to better constrain the extinction law toward the innermost Galaxy. By virtue of a deep and complete ca...
Alonso-García, J.
,
Minniti, D.
,
Catelan, M.
,
Contreras Ramos, R.
,
Gonzalez, O.A.
,
Hempel, M.
,
Lucas, P.W.
,
Saito, R.K.
,
Valenti, E.
,
Zoccali, M.
,
[Extinction ratios in the inner Galaxy as revealed by the VVV survey]
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Extinction ratios in the inner Galaxy as revealed by the VVV survey