2021A&A...656A.138F


Query : 2021A&A...656A.138F

2021A&A...656A.138F - Astronomy and Astrophysics, volume 656A, 138-138 (2021/12-1)

PENELLOPE. II. CVSO 104: A pre-main sequence close binary with an optical companion in Ori OB1.

FRASCA A., BOFFIN H.M.J., MANARA C.F., ALCALA J.M., ABRAHAM P., COVINO E., FANG M., GANGI M., HERCZEG G.J., KOSPAL A., VENUTI L., WALTER F.M., ALONSO-SANTIAGO J., GRANKIN K., SIWAK M., ALECIAN E. and CABRIT S.

Abstract (from CDS):

We present the results of our study of the close pre-main sequence spectroscopic binary CVSO 104 in Ori OB1, based on data obtained within the PENELLOPE legacy program. We derive, for the first time, the orbital elements of the system and the stellar parameters of the two components. The system is composed of two early M-type stars and has an orbital period of about five days and a mass ratio of 0.92, but contrary to expectations, it does not appear to have a tertiary companion. Both components have been (quasi-)synchronized, but the orbit is still very eccentric. The spectral energy distribution clearly displays a significant infrared excess that is compatible with a circumbinary disk. The analysis of HeI and Balmer line profiles, after the removal of the composite photospheric spectrum, reveals that both components are accreting at a similar level. We also observe excess emission in Hα and Hβ, which appears redshifted or blueshifted by more than 100 km s–1 with respect to the mass center of the system, depending on the orbital phase. This additional emission could be connected with accretion structures, such as funnels of matter from the circumbinary disk. We also analyze the optical companion located at about 2.4" from the spectroscopic binary. This companion, which we named CVSO 104 B, turns out to be a background Sun-like star that is not physically associated with the PMS system and does not belong to Ori OB1.

Abstract Copyright: © ESO 2021

Journal keyword(s): stars: pre-main sequence - binaries: spectroscopic - stars: low-mass - accretion, accretion disks - protoplanetary disks - stars: individual: CVSO104

Simbad objects: 17

goto Full paper

goto View the references in ADS

Number of rows : 17
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 V* II Tau Er* 03 49 43.2760877136 +24 19 04.494227808   15.798 14.185 14.021   M4.6V 75 0
2 V* UZ Tau Y*O 04 32 42.81 +25 52 31.3           M4Ve+M1/3Ve 305 0
3 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4094 0
4 V* DQ Tau Or* 04 46 53.0575226016 +17 00 00.136127304 14.56 13.67 12.00 13.21   M1Ve 319 0
5 Haro 5-64 TT* 05 32 06.3834880079 -01 11 00.110270575   15.02 14.22 14.11 12.83 K7 19 0
6 Gaia DR3 3217634162083288320 * 05 32 06.5289028643 -01 11 00.836949033           ~ 1 0
7 Ass Ori OB 1b As* 05 34.0 -01 30           ~ 257 0
8 NAME Ori I As* 05 38 -02.8           ~ 592 0
9 NAME Horsehead Nebula DNe 05 40 59.0 -02 27 30           ~ 492 0
10 IC 434 HII 05 41 -02.5           ~ 85 1
11 NGC 2264 OpC 06 40 52 +09 52.6           ~ 1730 0
12 KHA 129 TT* 06 41 44.2257848472 +09 25 02.435240964 19.03 18.35 16.81 15.74 14.50 M 36 0
13 TWA 3A TT* 11 10 27.9121410480 -37 31 51.535547940   14.04 12.57   9.10 M4Ve 202 0
14 BD+11 2576 PM* 13 29 59.7858994351 +10 22 37.784532575 11.728 10.524 9.029 8.07 7.013 M1.0V 235 0
15 NAME Upper Sco Association As* 16 12 -23.4           ~ 1252 1
16 V* AK Sco Ae* 16 54 44.8491575376 -36 53 18.566586456 9.80 9.63 9.00     F5V 259 1
17 HD 319139 SB* 18 14 10.4818675368 -32 47 34.516836060   11.47 10.68   9.11 K5+K7 341 0

To bookmark this query, right click on this link: simbad:objects in 2021A&A...656A.138F and select 'bookmark this link' or equivalent in the popup menu


2023.01.31-08:40:47

© Université de Strasbourg/CNRS

    • Contact