ATTENZIONE!!! IL SISTEMA E' UTILIZZABILE ESCLUSIVAMENTE IN MODALITA' "CONSULTAZIONE". CAUSA PROBLEMI TECNICI, SI PREGA DI NON EFFETTUARE L'AUTENTICAZIONE, FINO A NUOVA COMUNICAZIONE. GRAZIE
 

Photometric study of HD 15555 in the beta Pictoris Association

Journal
Date Issued
2015
Author(s)
•
Millward, Mervyn
•
Bradstreet, David H.
DOI
Abstract
We are carrying out a series of photometric monitoring to measure the rotation periods of members in the young β Pictoris Association, as part of the RACE-OC project (Rotation and ACtivity Evolution in Open Clusters). In this paper, we present the results for HD 155555C which is believed to be physically associated to the spectroscopic binary V824 Ara (HD 155555) and thus constituting a triple system. We collected B, V, and R-band photometric data timeseries and discovered from periodogram analysis the rotation period P = 4.43 d. Combined with stellar radius and projected rotational velocity, we find this star almost equator-on with an inclination i ≃ 90 ° . The rotational properties of HD 155555C fit well into the period distribution of other β Pic members, giving further support to the suggested membership to the association and to its physical association to V824 Ara. A comparison with pre-main-sequence isochrones from various models allows us to estimate an age of 20 ± 15 Myr for this triple system
Volume
37
Start page
105
Uri
Url
Issn Identifier
1384-1076
Ads BibCode
2015NewA...37..105M
Rights
open.access
File(s)
Loading...
Thumbnail Image
Name

NewAstr 37 105 2015.pdf

Description
[administrators only]
Size

722.26 KB

Format

Adobe PDF

Checksum (MD5)

92f3098471a48acd606ece14846e55cb

Loading...
Thumbnail Image
Name

1502.02395.pdf

Description
postprint
Size

673.61 KB

Format

Adobe PDF

Checksum (MD5)

2a63837d7abce89195d697bdf0df9c9d