Article (Scientific journals)
Evolution of the disk of π Aqr: From near-disappearance to a strong maximum
Nazé, Yaël; Rauw, Grégor; Guarro Fló, J. et al.
2019In New Astronomy, 73, p. 101279(11
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Abstract :
[en] Some Be stars display important variability of the strength of the emission lines formed in their disk. This is notably the case of pi Aqr. We present here the recent evolution of the Be disk in this system thanks to spectra collected by amateur spectroscopists since the end of 2013. A large transition occurred: the emission linked to the Be disk nearly disappeared in January 2014, but the disk has recovered, with a line strength now reaching levels only seen during the active phase of 1950--1990. In parallel to this change in strength occurs a change of disk structure, notably involving the disappearance of the strong asymmetry responsible for the V/R modulation.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Nazé, Yaël  ;  Université de Liège - ULiège > Groupe d'astrophysique des hautes énergies (GAPHE)
Rauw, Grégor  ;  Université de Liège - ULiège > Groupe d'astrophysique des hautes énergies (GAPHE)
Guarro Fló, J.;  Balmes 2, 08784 Piera (Barcelona), Spain
De Bruin, A.;  Gooiergracht 91, 1250–1252, Laren, Netherlands
Garde, O.;  Observatoire de la Tourbière, Chabons, 38690, France
Thizy, O.;  Observatoire de la Belle Étoile, Revel, 38420, France
Houpert, F.;  Verny Observatory, Verny, 57420, France
Pollmann, E.;  Emil-Nolde-Strasse 12, Leverkusen, 51375, Germany
Sawicki, C. J.;  PO box 141, Alpine, Texas, 79831, United States
Leonardi, M.;  Cotoletta Observatory, Via Matteotti 81, Gorgonzola (MI), 20064, Italy
Moll, M.;  Kapellenkamp 21, Lübeck, 23569, Germany
Quandt, C. T.;  Uhlandstrasse 11d, Stockelsdorf, 23617, Germany
Berardi, P.;  Bellavista Observatory, Via Carlo De Paulis, 15 - 67100, L'Aquila, Italy
Lester, T.;  1178 Mill Ridge Road, Arnprior, ON K7S3G8, Canada
Fosanelli, P.;  39 Rue des Songes, Staffelfelden, 68850, France
Favaro, A.;  19 Bd Carnot, Dijon, 21000, France
Terry, J.-N.;  Observatoire du Pilat, Tarentaise, 42660, France
Graham, K.;  23746 Schoolhouse Road, Manhattan, IL, United States
Mauclaire, B.;  Observatoire du Val de l'Arc, Trets, 13530, France
Bohlsen, T.;  Mirranook Observatory, Armidale NSW, Australia
Pujol, M.;  Rue des Pins, Beauzelle, 31700, France
Bertrand, E.;  105 Bd de la Côte de Beauté, Vaux Sur Mer, 17640, France
Bryssinck, E.;  Eyckensbeekstraat 2, Kruibeke, 9150, Belgium
Desnoux, V.;  13 Rue Saint Charles, Paris, 75015, France
Lailly, P.;  Observatoire Canigou, Pau, 64000, France
Montier, J.;  Centre d'Astronomie de La Couyère, La Couyère, 35320, France
Mannucci, M.;  Osservatorio Astronomico Margherita Hack, Lasra a Signa (FI), Italy
Montigiani, N.;  Osservatorio Astronomico Margherita Hack, Lasra a Signa (FI), Italy
Stiewing, A.;  16210 N Desert Holly Dr, Sun City, AZ 85351, United States
Daglen, J.;  33 Joy Rd, PO Box 196, Mayhill, NM 88339, United States
Kreider, C.;  17 Rue Schelbaum, 68360, Soultz, France
Lemoult, T.;  Chelles Observatory, 23 Avenue Henin, 77500, Chelles, France
Rodda, T.;  1 Rivermede, Ponteland, Newcastle upon TyneNE20 9XA, United Kingdom
More authors (23 more) Less
Language :
English
Title :
Evolution of the disk of π Aqr: From near-disappearance to a strong maximum
Publication date :
November 2019
Journal title :
New Astronomy
ISSN :
1384-1076
eISSN :
1384-1092
Publisher :
Elsevier B.V.
Volume :
73
Pages :
101279(11p)
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 16 October 2019

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