2017A&A...608L...2P

Query : 2017A&A...608L...2P

2017A&A...608L...2P - Astronomy and Astrophysics, volume 608L2-2 (2017/12-1)

XMM-Newton imaging of V1818 Orionis: a young stellar group on the eastern edge of the κ Ori ring.

PILLITTERI I., WOLK S.J. and MEGEATH S.T.

Abstract (from CDS):

We present the results of a 40ks XMM-Newton observation centered on the variable star V1818 Ori. Using a combination of the XMM-Newton and AllWISE catalog data, we identify a group of about 31 young stellar objects (YSOs) around V1818 Ori. This group is coincident with the eastern edge of the dust ring surrounding κ Ori. Previously, we concluded that the YSOs on the western side of ring were formed in an episode of star formation that started 3-5Myr ago and are at a distance similar to that of κ Ori (250-280pc) and in the foreground to the Orion A cloud. Here we use the XMM-Newton observation to calculate X-ray fluxes and luminosities of the young stars around V1818 Ori. We find that their X-ray luminosity function (XLF), calculated for a distance of ∼270pc, matches the XLF of the YSOs west of κ Ori. We rule out that this group of young stars is associated with Mon R2 as assumed in the literature; they are instead part of the same stellar population of the κ Ori ring.

Abstract Copyright: © ESO, 2017

Journal keyword(s): stars: activity - stars: formation - stars: individual: (V1818 Ori, {kappa} Ori) - stars: individual: (V1818 Ori, {kappa} Ori)

Simbad objects: 37

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Number of rows : 37
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 NAME Ori Region reg 05 35 17.30 -05 23 28.0           ~ 623 0
2 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
3 LDN 1641 MoC 05 39.0 -07 00           ~ 502 0
4 * kap Ori s*b 05 47 45.3888404 -09 40 10.577707 0.87 1.88 2.06 2.09 2.27 B0.5Ia 588 0
5 2MASS J05531064-1032403 Y*? 05 53 10.6617490200 -10 32 40.312297104           ~ 1 0
6 2MASS J05531114-1032382 Y*O 05 53 11.1529688208 -10 32 38.216479668           ~ 1 0
7 2MASS J05531122-1031482 Y*? 05 53 11.2314877800 -10 31 48.264915936           ~ 1 0
8 2MASS J05531725-1032218 Y*O 05 53 17.2630918848 -10 32 21.887572020           ~ 1 0
9 IRAS 05510-1018 Y*O 05 53 23.02656 -10 17 32.6148           ~ 6 0
10 2MASS J05532370-1017276 Y*O 05 53 23.70888 -10 17 27.6360           ~ 1 0
11 2MASS J05532505-1027302 Y*O 05 53 25.0657499808 -10 27 30.198707820           ~ 4 0
12 2MASS J05532538-1027155 Y*O 05 53 25.3986431880 -10 27 15.520508352           ~ 2 0
13 2MASS J05532935-1018164 Y*? 05 53 29.3727981936 -10 18 16.380698724   13.10 11.53     ~ 1 0
14 GSC 05352-00154 Y*O 05 53 29.89104 -10 24 33.7356           ~ 3 0
15 2MASS J05532989-1026352 Y*? 05 53 29.9117965752 -10 26 35.212508124           ~ 1 0
16 2MASS J05533303-1027128 Y*O 05 53 33.034 -10 27 12.87           ~ 2 0
17 2MASS J05533316-1025369 Y*? 05 53 33.1773045096 -10 25 36.866019324           ~ 1 0
18 2MASS J05533378-1022474 RR* 05 53 33.7998217536 -10 22 47.351777952     16.34     ~ 3 0
19 2MASS J05533696-1020438 Y*? 05 53 36.9789614184 -10 20 43.802149524           ~ 1 0
20 2MASS J05533991-1023508 Y*O 05 53 39.9257334168 -10 23 50.735928336           ~ 4 0
21 2MASS J05534054-1024033 Y*O 05 53 40.5485804400 -10 24 03.290227884           ~ 2 0
22 2MASS J05534209-1025254 Y*? 05 53 42.09840 -10 25 25.4388           ~ 1 0
23 CRTS J055342.4-102214 Y*O 05 53 42.4269417384 -10 22 14.797452108     15.88     ~ 3 0
24 V* V1818 Ori Ae* 05 53 42.5559205608 -10 24 00.727634016     13.40     Ae 49 0
25 2MASS J05534297-1026179 Y*O 05 53 42.9812742240 -10 26 17.953138644           ~ 3 0
26 2MASS J05534332-1011239 Y*? 05 53 43.32336 -10 11 23.9136           ~ 1 0
27 2MASS J05534366-1022454 Y*? 05 53 43.6770913296 -10 22 45.427928412           ~ 1 0
28 ATO J088.4375-10.3893 Y*O 05 53 45.0160545864 -10 23 21.704628012           ~ 3 0
29 ATO J088.4400-10.4141 TT* 05 53 45.6051129336 -10 24 51.053451012           ~ 6 0
30 2MASS J05534605-1034520 Y*O 05 53 46.0637266728 -10 34 52.139633196           ~ 1 0
31 2MASS J05534767-1025060 Y*O 05 53 47.6856749985 -10 25 06.079805811           ~ 3 0
32 2MASS J05535667-1024463 Y*? 05 53 56.67192 -10 24 46.3464           ~ 1 0
33 2MASS J05535856-1028044 Y*? 05 53 58.5679454280 -10 28 04.406409660           ~ 1 0
34 2MASS J05540152-1019129 Y*? 05 54 01.52208 -10 19 12.9036           ~ 1 0
35 2MASS J05540990-1028528 Y*? 05 54 09.9054259248 -10 28 52.787096040           ~ 1 0
36 NAME Orion Molecular Cloud MoC 05 56 -01.8           ~ 1227 1
37 NAME Mon R2 HII 06 07 47.58 -06 22 42.6           ~ 789 2

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