A photometric survey of stars with circumstellar material

A. Lecavelier Des Etangs; C. Nitschelm; E. H. Olsen; A. Vidal-Madjar; R. Ferlet

doi:10.1051/0004-6361:20042401

A photometric survey of stars with circumstellar material

A. Lecavelier Des Etangs, C. Nitschelm, E. H. Olsen, A. Vidal-Madjar, R. Ferlet

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

Abstract

We present the result of a follow-up Strömgren photometric survey of sixteen southern bright stars with circumstellar material, in order to detect possible weak photometric variations. We found new variations of the β Pictoris brightness from 1999 to 2002 with a weak long-term variation of ∼-0.8 × 10^-3 mag per year, over about 3 years. These variations look similar to those seen from 1975 to 1981 and from 1995 to 1998 (Nitschelm et al. 2000, A&AS, 145, 275). They can be due to differential occultation by dust inhomogeneities transiting the star through the years. We detected new periodic variations for HD 256 (HR 10) with periods ranging from 0.35 day to 6.69 days during several months. These variations may also be interpreted in terms of variable obscuration due to structures in the circumstellar disk suspected to be surrounding this star.

Original language	English
Pages (from-to)	571-574
Number of pages	4
Journal	Astronomy and Astrophysics
Volume	439
Issue number	2
DOIs	https://doi.org/10.1051/0004-6361:20042401
Publication status	Published - 1 Aug 2005
Externally published	Yes

Keywords

Circumstellar matter
Planetary systems
Stars: individual: β Pic, HR 10, HD 38392, V1026 Sco

Access to Document

10.1051/0004-6361:20042401

Cite this

@article{35fedd8da2d34953bd788e93e28ea06f,

title = "A photometric survey of stars with circumstellar material",

abstract = "We present the result of a follow-up Str{\"o}mgren photometric survey of sixteen southern bright stars with circumstellar material, in order to detect possible weak photometric variations. We found new variations of the β Pictoris brightness from 1999 to 2002 with a weak long-term variation of ∼-0.8 × 10-3 mag per year, over about 3 years. These variations look similar to those seen from 1975 to 1981 and from 1995 to 1998 (Nitschelm et al. 2000, A\&AS, 145, 275). They can be due to differential occultation by dust inhomogeneities transiting the star through the years. We detected new periodic variations for HD 256 (HR 10) with periods ranging from 0.35 day to 6.69 days during several months. These variations may also be interpreted in terms of variable obscuration due to structures in the circumstellar disk suspected to be surrounding this star.",

keywords = "Circumstellar matter, Planetary systems, Stars: individual: β Pic, HR 10, HD 38392, V1026 Sco",

author = "\{Lecavelier Des Etangs\}, A. and C. Nitschelm and Olsen, \{E. H.\} and A. Vidal-Madjar and R. Ferlet",

year = "2005",

month = aug,

day = "1",

doi = "10.1051/0004-6361:20042401",

language = "English",

volume = "439",

pages = "571--574",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

number = "2",

}

TY - JOUR

T1 - A photometric survey of stars with circumstellar material

AU - Lecavelier Des Etangs, A.

AU - Nitschelm, C.

AU - Olsen, E. H.

AU - Vidal-Madjar, A.

AU - Ferlet, R.

PY - 2005/8/1

Y1 - 2005/8/1

N2 - We present the result of a follow-up Strömgren photometric survey of sixteen southern bright stars with circumstellar material, in order to detect possible weak photometric variations. We found new variations of the β Pictoris brightness from 1999 to 2002 with a weak long-term variation of ∼-0.8 × 10-3 mag per year, over about 3 years. These variations look similar to those seen from 1975 to 1981 and from 1995 to 1998 (Nitschelm et al. 2000, A&AS, 145, 275). They can be due to differential occultation by dust inhomogeneities transiting the star through the years. We detected new periodic variations for HD 256 (HR 10) with periods ranging from 0.35 day to 6.69 days during several months. These variations may also be interpreted in terms of variable obscuration due to structures in the circumstellar disk suspected to be surrounding this star.

AB - We present the result of a follow-up Strömgren photometric survey of sixteen southern bright stars with circumstellar material, in order to detect possible weak photometric variations. We found new variations of the β Pictoris brightness from 1999 to 2002 with a weak long-term variation of ∼-0.8 × 10-3 mag per year, over about 3 years. These variations look similar to those seen from 1975 to 1981 and from 1995 to 1998 (Nitschelm et al. 2000, A&AS, 145, 275). They can be due to differential occultation by dust inhomogeneities transiting the star through the years. We detected new periodic variations for HD 256 (HR 10) with periods ranging from 0.35 day to 6.69 days during several months. These variations may also be interpreted in terms of variable obscuration due to structures in the circumstellar disk suspected to be surrounding this star.

KW - Circumstellar matter

KW - Planetary systems

KW - Stars: individual: β Pic, HR 10, HD 38392, V1026 Sco

U2 - 10.1051/0004-6361:20042401

DO - 10.1051/0004-6361:20042401

M3 - Article

AN - SCOPUS:23944495861

SN - 0004-6361

VL - 439

SP - 571

EP - 574

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 2

ER -

A photometric survey of stars with circumstellar material

Abstract

Keywords

Access to Document

Fingerprint

Cite this