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Gigoyan, K. S.; Abrahamyan, H. V.; Azzopardi, M.; Russeil, D.

doi:10.1023/a:1012867728071

Cited by 9 publications

(27 citation statements)

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“…The spectroscopic criteria to identify M-type stars later than M2 and all C-type stars have been described in earlier papers of this series [1][2][3] [20].…”

Section: New Stars Of Late Spectral Types From the Dfbsmentioning

confidence: 99%

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Late-type stars found in the DFBS

Gigoyan¹,

Sinamyan²,

Engels

et al. 2010

Astrophysics

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A list of comparatively faint late M and Carbon type stars detected on the Digitized First Byurakan Survey (DFBS) spectral plates in the zone with o o 49 45 + ≤ δ ≤ + covering 684 deg 2 is presented. Accurate DSS2 positions, USNO-B1.0 B and R magnitudes, 2MASS near-infrared J, H, and K S photometry, IRAS PSC/FSC fluxes (when available), approximate spectral types, and luminosity class estimates are given for 72 objects. Nine of them are newly confirmed carbon stars and 63 are M-type stars. For seven Mira variables with known pulsation periods we determined distances of 8 2 ÷ kpc using a period-luminosity relation. Distances of 115 17 ÷ pc for five M dwarfs, classified on the base of detected proper motions, were estimated using a color-luminosity relation. The object FBS 0845+466 is classified as a candidate carbon dwarf with distance 72 ≈ r pc.

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“…The spectroscopic criteria to identify M-type stars later than M2 and all C-type stars have been described in earlier papers of this series [1][2][3] [20].…”

Section: New Stars Of Late Spectral Types From the Dfbsmentioning

confidence: 99%

“…Table 1is available in electronic form at CDS, Strasbourg, France 2. The HQS plates are accessible online at http://www.hs.uni-hamburg.de/EN/For/Exg/Sur/hqs/online/index.html.…”

mentioning

confidence: 99%

Late-type stars found in the DFBS

Gigoyan¹,

Sinamyan²,

Engels

et al. 2010

Astrophysics

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“…In this paper we continue the investigation of the late -type stars provided by the First Byurakan Spectral Sky Survey (FBS) [1][2][3][4][5][6]. These are either of M-type (oxygen-rich) or C-type (carbon-rich) late-type stars.…”

Section: Introductionmentioning

confidence: 99%

“…degrees of the Northern Sky [7]. Information about FBS and the description of the spectroscopic criteria for selecting M-type and C-type stars on the survey plates have been given in a series of early papers [1][2][3][4][5][6]. In these works we also presented analysis devoted to the faint C and M-type stars and discussed the current status of investigations of such objects at high Galactic latitudes.…”

Section: Introductionmentioning

confidence: 99%

“…In our previous paper [9] concerning a sub-sample of FBS late-type stars (lists XI and XII [3,4], 142 object), we presented the infrared properties using USNO-A2.0 [10] database and the 2MASS 2nd Incremental Data Release which did not cover the whole sky at that time. The main result was that by only using photometric data we could found three families Original article submitted August 11, 2004 among the FBS red objects.…”

Section: Introductionmentioning

confidence: 99%

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Infrared Properties of Late - Type Stars Provided by the First Byurakan Spectral Sky Survey. The Nature of the Red Objects

Gigoyan

Mauron²,

Azzopardi³

et al. 2005

Astrophysics

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Using modern astronomical databases, particularly 2MASS All -Sky Data Release Point Source Catalog and USNO-B1.0 catalog, we investigate the properties of about 840 FBS red stars in order to clarifiy their nature. We use and analyse their JHK 2MASS photometry, together with the R-band magnitudes and the proper motions provided by USNO -B1.0. Approximately 70% of all objects appear to be Asymptotic Giant Branch stars, 18% are giants, and close to 12% are objects with detectable proper motions, allowing to consider them as dwarf M-type stars. When plotted in a J -K versus R -K colour-colour diagram, one finds that objects with proper motions are well separated into a narrow belt.

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