2014A&A...565L...7A


Query : 2014A&A...565L...7A

2014A&A...565L...7A - Astronomy and Astrophysics, volume 565, L7-7 (2014/5-1)

Recent outburst of the young star V1180 Cassiopeiae.

ANTONIUCCI S., ARKHAROV A.A., DI PAOLA A., GIANNINI T., HARUTYUNYAN A., KOPATSKAYA E.N., LARIONOV V.M., LI CAUSI G., LORENZETTI D., MOROZOVA D., NISINI B. and VITALI F.

Abstract (from CDS):

We report on the ongoing outburst of the young variable V1180 Cas, which is known to display characteristics in common with EXor eruptive variables. We present results that support the scenario of an accretion-driven nature of the brightness variations of the object and provide the first evidence of jet structures around the source. We monitored the recent flux variations of the target in the RC, J, H, and K bands. New optical and near-IR spectra taken during the current high state of V1180 Cas are presented, in conjunction with H2 narrow-band imaging of the source. Observed near-IR colour variations are analogous to those observed in EXors and consistent with excess emission originating from an accretion event. The spectra show numerous emission lines, which indicates accretion, ejection of matter, and an active disc. Using optical and near-IR emission features we derive a mass accretion rate of ∼3x10–8M/yr, which is an order of magnitude lower than previous estimates. In addition, a mass loss rate of ∼4x10–9 and ∼ 4x10–10M/yr are estimated from atomic forbidden lines and H2, respectively. Our H2 imaging reveals two bright knots of emission around the source and the nearby optically invisible star V1180 Cas B, clearly indicative of mass-loss phenomena. Higher resolution observations of the detected jet will help to clarify whether V1180 Cas is the driving source and to determine the relation between the observed knots.

Abstract Copyright:

Journal keyword(s): stars: individual: V1180 Cassiopeiae - stars: pre-main sequence - stars: jets - accretion, accretion disks - stars: variables: general

VizieR on-line data: <Available at CDS (J/A+A/565/L7): list.dat sp/*>

CDS comments: Paragraph 3.3 Knots N and S and MHO 2964 not in SIMBAD.

Simbad objects: 4

goto Full paper

goto View the references in ADS

Number of rows : 4
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 LDN 1340 DNe 02 30 40 +72 57.3           ~ 34 0
2 [KOS94] HA 11 Em* 02 33 01.2 +72 43 29           K7-M0 5 0
3 V* V1180 Cas Or* 02 33 01.5361317744 +72 43 26.807653884 22.476 21.433 19.280 18.029 16.878 K7 21 0
4 2MASS J02330247+7243315 Y*O 02 33 02.473 +72 43 31.56           ~ 5 0

To bookmark this query, right click on this link: simbad:objects in 2014A&A...565L...7A and select 'bookmark this link' or equivalent in the popup menu