2011ApJ...733L...8K

Query : 2011ApJ...733L...8K

2011ApJ...733L...8K - Astrophys. J., 733, L8 (2011/May-3)

A peculiar young eruptive star in the dark cloud Lynds 1340.

KUN M., SZEGEDI-ELEK E., MOOR A., ABRAHAM P., ACOSTA-PULIDO J.A., APAI D., KELEMEN J., PAL A., RACZ M., REGALY Zs., SZAKATS R., SZALAI N. and SZING A.

Abstract (from CDS):

We conducted a long-term optical photometric and spectroscopic monitoring of the strongly variable, accreting young sun-like star [KOS94] HA11, associated with the dark cloud Lynds 1340 that exhibited large amplitude (5-6 mag in the ICband) brightness variations on 2-3 years timescales, flat spectral energy distribution (SED), and extremely strong (300≲ EW/Å ≲ 900) Hα emission. In this Letter we describe the basic properties of the star, derived from our observations between 1999 and 2011, and put into context the observed phenomena. The observed variations in the emission spectra, near-infrared colors, and SED suggest that [KOS94] HA11 (spectral type: K7-M0) is an eruptive young star, possibly similar in nature to V1647 Ori: its large-scale photometric variations are governed by variable accretion rate, associated with variations in the inner disk structure. The star recently has undergone strong and rapid brightness variations, thus its further observations may offer a rare opportunity for studying structural and chemical rearrangements of the inner disk, induced by variable central luminosity.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - stars: individual: [KOS94] HA11 - stars: pre-main sequence - stars: variables: T Tauri, Herbig Ae/Be

VizieR on-line data: <Available at CDS (J/ApJ/733/L8): table1.dat>

Nomenclature: [KOS94] HA11 A (Nos A-B).

Simbad objects: 11

goto Full paper

goto View the references in ADS

Number of rows : 11
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 LDN 1340 DNe 02 30 40 +72 57.3           ~ 35 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 26 0
4 2MASS J02330247+7243315 Y*O 02 33 02.473 +72 43 31.56           ~ 6 0
5 IRAS 02283+7230 IR 02 33 02.7 +72 43 30           ~ 6 0
6 V* V1647 Ori Or* 05 46 13.1370578472 -00 06 04.885093296     18.1     M3.9 317 1
7 V* V1184 Tau Or* 05 47 03.7742454720 +21 00 34.786359684       14.66   G5III/IVne 42 0
8 V* PV Cep Or* 20 45 53.9540390184 +67 57 38.679941304   19.27 17.46 15.98 14.60 A5 282 1
9 V* V2492 Cyg Or* 20 51 26.2367188536 +44 05 23.869354488   20.2   18.3   F-GII/MI 107 0
10 V* V2493 Cyg Or* 20 58 17.0280367392 +43 53 43.341681156   19.678 18.023 17.67 15.233 M4.6 139 0
11 NGC 7790 OpC 23 58 27.6 +61 12 33   9.18 8.5     ~ 286 0

To bookmark this query, right click on this link: simbad:objects in 2011ApJ...733L...8K and select 'bookmark this link' or equivalent in the popup menu