The cool galactic R Coronae Borealis variable DY Persei

L. Začs; W. P. Chen; O. Alksnis; D. Kinoshita; F. A. Musaev; T. Brice; K. Sanchawala; H. T. Lee; C. W. Chen

doi:10.1051/0004-6361:200500118

The cool galactic R Coronae Borealis variable DY Persei

L. Začs, W. P. Chen, O. Alksnis, D. Kinoshita, F. A. Musaev, T. Brice, K. Sanchawala, H. T. Lee, C. W. Chen

Graduate Institute of Astronomy

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Results of first CCD photometry during the recent deep light decline, and high-resolution spectroscopy, are presented Dr DY Persei. The spectra show variable blueshifted features in the sodium D lines. The CI lines are strong whereas neutroncapture elements are not enhanced. The isotopic ¹³CN(2,0) lines relative to ¹²CN are of similar strength with those for the carbon star U Hya. All these confirm the RGB nature of DY Per and the existence of ejected clouds. At least two clouds are revealed at -197.3 and -143.0 km s^-1. A star was detected about 074 to the west and 2″.5 to the north from DY Per. This anonymous companion, with observed colour indices (B - V) = 0.68 and (V - R) ≃ 1.1, may be a foreground star.

Original language	English
Pages (from-to)	L13-L16
Journal	Astronomy and Astrophysics
Volume	438
Issue number	2
DOIs	https://doi.org/10.1051/0004-6361:200500118
State	Published - Aug 2005

Keywords

Stars: carbon
Stars: circumstellar matter
Stars: fundamental parameters
Stars: individual: DY Per
Stars: winds, outflows

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10.1051/0004-6361:200500118

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title = "The cool galactic R Coronae Borealis variable DY Persei",

abstract = "Results of first CCD photometry during the recent deep light decline, and high-resolution spectroscopy, are presented Dr DY Persei. The spectra show variable blueshifted features in the sodium D lines. The CI lines are strong whereas neutroncapture elements are not enhanced. The isotopic 13CN(2,0) lines relative to 12CN are of similar strength with those for the carbon star U Hya. All these confirm the RGB nature of DY Per and the existence of ejected clouds. At least two clouds are revealed at -197.3 and -143.0 km s-1. A star was detected about 074 to the west and 2″.5 to the north from DY Per. This anonymous companion, with observed colour indices (B - V) = 0.68 and (V - R) ≃ 1.1, may be a foreground star.",

keywords = "Stars: carbon, Stars: circumstellar matter, Stars: fundamental parameters, Stars: individual: DY Per, Stars: winds, outflows",

author = "L. Za{\v c}s and Chen, {W. P.} and O. Alksnis and D. Kinoshita and Musaev, {F. A.} and T. Brice and K. Sanchawala and Lee, {H. T.} and Chen, {C. W.}",

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T1 - The cool galactic R Coronae Borealis variable DY Persei

AU - Začs, L.

AU - Chen, W. P.

AU - Alksnis, O.

AU - Kinoshita, D.

AU - Musaev, F. A.

AU - Brice, T.

AU - Sanchawala, K.

AU - Lee, H. T.

AU - Chen, C. W.

PY - 2005/8

Y1 - 2005/8

N2 - Results of first CCD photometry during the recent deep light decline, and high-resolution spectroscopy, are presented Dr DY Persei. The spectra show variable blueshifted features in the sodium D lines. The CI lines are strong whereas neutroncapture elements are not enhanced. The isotopic 13CN(2,0) lines relative to 12CN are of similar strength with those for the carbon star U Hya. All these confirm the RGB nature of DY Per and the existence of ejected clouds. At least two clouds are revealed at -197.3 and -143.0 km s-1. A star was detected about 074 to the west and 2″.5 to the north from DY Per. This anonymous companion, with observed colour indices (B - V) = 0.68 and (V - R) ≃ 1.1, may be a foreground star.

AB - Results of first CCD photometry during the recent deep light decline, and high-resolution spectroscopy, are presented Dr DY Persei. The spectra show variable blueshifted features in the sodium D lines. The CI lines are strong whereas neutroncapture elements are not enhanced. The isotopic 13CN(2,0) lines relative to 12CN are of similar strength with those for the carbon star U Hya. All these confirm the RGB nature of DY Per and the existence of ejected clouds. At least two clouds are revealed at -197.3 and -143.0 km s-1. A star was detected about 074 to the west and 2″.5 to the north from DY Per. This anonymous companion, with observed colour indices (B - V) = 0.68 and (V - R) ≃ 1.1, may be a foreground star.

KW - Stars: carbon

KW - Stars: circumstellar matter

KW - Stars: fundamental parameters

KW - Stars: individual: DY Per

KW - Stars: winds, outflows

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U2 - 10.1051/0004-6361:200500118

DO - 10.1051/0004-6361:200500118

M3 - 期刊論文

AN - SCOPUS:23244431852

SN - 0004-6361

VL - 438

SP - L13-L16

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 2

ER -

The cool galactic R Coronae Borealis variable DY Persei

Abstract

Keywords

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