2018A&A...609A..70R

Query : 2018A&A...609A..70R

2018A&A...609A..70R - Astronomy and Astrophysics, volume 609A70-70 (2018/1-1)

X-shooter observations of low-mass stars in the η Chamaeleontis association.

RUGEL M., FEDELE D. and HERCZEG G.

Abstract (from CDS):

The nearby η Chamaeleontis association is a collection of 4-10Myr old stars with a disk fraction of 35-45%. In this study, the broad wavelength coverage of VLT/X-shooter is used to measure the stellar and mass accretion properties of 15 low-mass stars in the η Chamaeleontis association. For each star, the observed spectrum is fitted with a non-accreting stellar template and an accretion spectrum obtained from assuming a plane-parallel hydrogen slab. Five of the eight stars with an IR disk excess show excess UV emission, indicating ongoing accretion. The accretion rates measured here are similar to those obtained from previous measurements of excess UV emission, but tend to be higher than past measurements from Hα modeling. The mass accretion rates are consistent with those of other young star forming regions.

Abstract Copyright: © ESO, 2018

Journal keyword(s): stars: pre-main sequence - stars: low-mass - stars: variables: T Tauri, Herbig Ae/Be - accretion, accretion disks - open clusters and associations: individual: η Chamealeontis - protoplanetary disks

Simbad objects: 31

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Number of rows : 31
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 HD 27877 * 04 24 42.9606848736 +18 54 47.062968156   7.71 7.36     B8V 24 0
2 2MASS J05383858-0241558 Or* 05 38 38.5944218448 -02 41 55.925390112 20.86 21.50 19.80 18.31 16.42 M5.5e 39 0
3 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 623 0
4 NAME sigma Orionis Open Cluster OpC 05 38 51.8 -02 34 55           ~ 16 0
5 2MASS J05385492-0228583 Or* 05 38 54.9292657368 -02 28 58.375755156 21.05 20.21 18.61 17.22 15.48 M4.5 43 0
6 Mayrit 425070 Or* 05 39 11.4017533992 -02 33 32.831052984 21.773 21.52 19.94 18.32 16.43 M5e 37 0
7 GD 71 WD* 05 52 27.6198591816 +15 53 13.228887444 11.675 12.783 13.032 13.169 13.337 DA1.5 407 0
8 HD 70953 * 08 15 01.7258000160 -79 19 07.227069780   7.01 7.02   7.03 A0V 16 0
9 RECX 18 LM* 08 36 10.7009266536 -79 08 18.356133120     17.5     M5.5 40 0
10 V* EG Cha Or* 08 36 56.2143359952 -78 56 45.633633000   11.82 10.457   9.010 K4Ve 110 0
11 RECX 17 LM* 08 38 51.4849263144 -79 16 13.752884532   16.82 16.4     M5.5 39 0
12 V* ES Cha Or* 08 41 30.3105474648 -78 53 06.477949932     17.07     M5.0 49 0
13 V* EH Cha Or* 08 41 37.0144539384 -79 03 30.535583220     14.4 14.011   M3.5 62 0
14 HD 75505 * 08 41 44.7049093968 -79 02 53.258689068   7.55 7.38     A1V 57 0
15 V* EI Cha Or* 08 42 23.7595500240 -79 04 02.976309552     12.7     M1.5 71 0
16 V* EK Cha Or* 08 42 27.0967343784 -78 57 47.910415932   16.659 15.153 14.893   M4.5 84 0
17 Cl Mamajek 1 OpC 08 42 32.9 -78 57 47           ~ 392 0
18 V* EL Cha TT* 08 42 38.7832034688 -78 54 42.736732812   15.540 14.081 13.778   M3.0 69 0
19 V* EM Cha Or* 08 43 07.2443828304 -79 04 52.483961064     10.8     K6.0 64 0
20 V* ET Cha Or* 08 43 18.5853516024 -79 05 18.232481832     13.97     M4.0 99 0
21 RECX 16 LM* 08 44 09.1596371520 -78 33 45.774374724     18.4     M6.0 49 0
22 V* EN Cha Or* 08 44 16.421808 -78 59 08.06316   16.425 14.967 14.688   M4.5 70 0
23 V* EO Cha Or* 08 44 31.8938144088 -78 46 31.143275076     12.531   10.646 M0e 83 0
24 V* EP Cha Or* 08 47 01.6439909496 -78 59 34.380161016     11.1     K5IVe 109 0
25 V* EQ Cha TT* 08 47 56.7585043512 -78 54 53.185560516   14.777 13.308 12.802 10.795 M3 88 0
26 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
27 HD 98672 * 11 19 36.5281546752 -75 08 32.808187176   6.241 6.258     B9.5/A0V 34 0
28 NAME Cha II MoC 12 54 -77.2           ~ 361 0
29 NAME Lupus Complex SFR 16 03 -38.1           ~ 851 0
30 UCAC3 102-194847 Or* 16 08 35.7826940376 -39 03 47.933557092   16.88 15.49 15.02 13.09 M6 39 0
31 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1

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