2022ApJ...927..125C

Query : 2022ApJ...927..125C

2022ApJ...927..125C - Astrophys. J., 927, 125-125 (2022/March-1)

Recurrent Strong Outbursts of an EXor-like Young Eruptive Star Gaia20eae.

CRUZ-SAENZ DE MIERA F., KOSPAL A., ABRAHAM P., PARK S., NAGY Z., SIWAK M., KUN M., FIORELLINO E., SZABO Z.M., ANTONIUCCI S., GIANNINI T., NISINI B., SZABADOS L., KRISKOVICS L., ORDASI A., SZAKATS R., VIDA K., VINKO J., ZIELINSKI P., WYRZYKOWSKI L., GARCIA-ALVAREZ D., DROZDZ M., OGLOZA W. and SONBAS E.

Abstract (from CDS):

We present follow-up photometric and spectroscopic observations, and subsequent analysis of Gaia20eae. This source triggered photometric alerts during 2020 after showing a ∼3 mag increase in its brightness. Its Gaia Alert light curve showed the shape of a typical eruptive young star. We carried out observations to confirm Gaia20eae as an eruptive young star and classify it. Its pre-outburst spectral energy distribution shows that Gaia20eae is a moderately embedded Class II object with L bol = 7.22 L ☉. The color-color and color-magnitude diagrams indicate that the evolution in the light curve is mostly gray. Multiple epochs of the Hα line profile suggest an evolution of the accretion rate and winds. The near-infrared spectra display several emission lines, a feature typical of EX Lupi-type (EXor) eruptive young stars. We estimated the mass accretion rate during the dimming phase to be {dot}M = 3-8 x 10–7 M ☉ yr–1, higher than typical T Tauri stars of similar mass and comparable to other EXors. We conclude Gaia20eae is a new EXor-type candidate.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Young stellar objects - T Tauri stars - Spectroscopy - Broad band photometry

VizieR on-line data: <Available at CDS (J/ApJ/927/125): table1.dat>

Simbad objects: 19

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Number of rows : 19
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 V* UZ Tau A TT* 04 32 43.0720716552 +25 52 31.013712120       13.15   M2.0e+M3.0e 148 0
2 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
3 V* DR Tau Or* 04 47 06.2151561264 +16 58 42.813872580 12.03 11.86 10.50 12.19   K5Ve 585 0
4 V* V1118 Ori TT* 05 34 44.7401295035 -05 33 42.119715628 15.053 15.378 14.430 15.22 12.701 M1e 153 0
5 V* V1647 Ori Or* 05 46 13.1370578472 -00 06 04.885093296     18.1     M3.9 317 1
6 V* V899 Mon Or* 06 09 19.2451557192 -06 41 55.882661856           ~ 39 0
7 2MASS J08104579-3604310 Or* 08 10 45.7934159760 -36 04 31.006581240           ~ 22 0
8 ESO-HA 99 Or* 08 38 55.1842816752 -40 41 17.340138060     19.1     ~ 20 0
9 HD 325367 Or* 16 03 05.4915085848 -40 18 25.426727676   11.40 8.50     M0 406 0
10 SSTGLMC G050.2443-00.5100 Y*? 19 25 39.4489198704 +15 06 57.819052980           ~ 2 0
11 AT 2020nrs Y*? 19 25 40.60968 +15 07 46.5024           ~ 22 0
12 SSTGLMC G050.2645-00.5107 Y*? 19 25 41.9872350336 +15 08 00.605639436           ~ 2 0
13 SSTGLMC G050.2675-00.5116 Y*? 19 25 42.536 +15 08 08.38           ~ 2 0
14 [RML2017] MC2 MoC 19 26.0 +15 03           ~ 4 0
15 2MASS J19310560+1827525 Or* 19 31 05.5881891528 +18 27 52.234225920           ~ 44 0
16 HD 184058 * 19 31 29.9287013208 +28 43 02.199086832   7.88 7.59     F0V 19 0
17 2MASS J20050603+3629135 Or* 20 05 06.0330485280 +36 29 13.587344484           ~ 31 0
18 IRAS 20390+4642 Y*O 20 40 44.3884267824 +46 53 21.386816592           ~ 19 0
19 EM* LkHA 190 Or* 20 58 53.7335347296 +44 15 28.388727720   14.26 12.33 12.13   F7/G3I/IIe 530 0

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