2012A&A...542A..43S


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.13CET16:41:40

2012A&A...542A..43S - Astronomy and Astrophysics, volume 542A, 43-43 (2012/6-1)

Optical photometric and spectral study of the new FU Orionis object V2493 Cygni (HBC 722).

SEMKOV E.H., PENEVA S.P., MUNARI U., TSVETKOV M.K., JURDANA-SEPIC R., DE MIGUEL E., SCHWARTZ R.D., DIMITROV D.P., KJURKCHIEVA D.P. and RADEVA V.S.

Abstract (from CDS):

We present new results from optical photometric and spectroscopic observations of the eruptive pre-main sequence star V2493 Cyg (HBC 722). The object has continued to undergo significant brightness variations over the past few months and is an ideal target for follow-up observations. We carried out CCD BVRI photometric observations in the field of V2493 Cyg (``Gulf of Mexico'') from August 1994 to April 2012, i.e. at the pre-outburst states and during the phases of the outburst. We acquired high, medium, and low resolution spectroscopy of V2493 Cyg during the outburst. To study the pre-outburst variability of the target and construct its historical light curve, we searched for archival observations in photographic plate collections. Both CCD and photographic observations were analyzed using 15 comparison stars in the field of V2493 Cyg. The pre-outburst photographic and CCD photometric observations of V2493 Cyg show low-amplitude light variations typical of T Tauri stars. The recent photometric data show a slow light decrease from October 2010 to June 2011 followed by an increase in brightness that continued until early 2012. The spectral observations of V2493 Cyg are typical of FU Orionis stars absorption spectra with strong P Cyg profiles of Hα and NaI D lines. On the basis of photometric monitoring performed over the past two years, the spectral properties at the maximal light, as well as the shape of long-term light curves, we confirm that the observed outburst of V2493 Cyg is of FU Orionis type.

Abstract Copyright:

Journal keyword(s): stars: pre-main sequence - stars: variables: T Tauri, Herbig Ae/Be - stars: individual: V2493 Cygni

VizieR on-line data: <Available at CDS (J/A+A/542/A43): table1.dat table3.dat>

Simbad objects: 18

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Number of rows : 18

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * mu. Per SB* 04 14 53.8625277 +48 24 33.591168 5.75 5.12 4.16 3.38 2.83 G0Ib 218 0
2 HBC 393 FU* 04 31 34.077 +18 08 04.90           K3V/M3III 775 2
3 V* V582 Aur FU* 05 25 51.9739981848 +34 52 30.095920082   17.0 14.78 13.49 12.23 ~ 17 0
4 V* FU Ori FU* 05 45 22.3650208559 +09 04 12.296285806   10.72 9.60     F0Iab 689 1
5 V* V1647 Ori FU* 05 46 13.1370923766 -00 06 04.876812846     18.1     ~ 221 1
6 * 25 Gem * 06 41 20.8972844449 +28 11 47.904657429   7.521 6.427     G5Ib 83 0
7 HD 325367 TT* 16 03 05.4914377137 -40 18 25.426543472   11.40 8.50     M0 270 0
8 Parsamian 21 FU* 19 29 00.849 +09 38 43.40   15.18 14.07 13.93   F5Iabe 81 1
9 V* V1515 Cyg FU* 20 23 48.0159810586 +42 12 25.780858811   13.470 12.530 11.210   G0/G2Ib 206 0
10 IC 5070 HII 20 51.0 +44 22           ~ 172 1
11 NAME Golf of Mexico DNe 20 56.8 +43 52           ~ 40 0
12 V* V2493 Cyg FU* 20 58 17.0282353931 +43 53 43.339695195   19.678 18.023 17.67 15.233 K0-M7 87 0
13 V* V2494 Cyg FU* 20 58 21.0940784636 +52 29 27.710539961           ~ 39 0
14 EM* LkHA 188 TT* 20 58 23.8104754955 +43 53 11.391445275     14.65 13.69 13.37 K0e 46 0
15 NGC 7000 HII 20 58 47 +44 19.8           ~ 357 1
16 EM* LkHA 190 FU* 20 58 53.7336698326 +44 15 28.384667940     15.6     F7/G3I/IIe 467 0
17 V* V1735 Cyg FU* 21 47 20.6624829527 +47 32 03.856911703           ~ 150 0
18 V* V733 Cep FU* 22 53 33.2582967602 +62 32 23.630788987     18.57   14.63 ~ 31 0

    Equat.    Gal    SGal    Ecl

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2019.12.13-16:41:40

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