2015ApJ...813..107H

Query : 2015ApJ...813..107H

2015ApJ...813..107H - Astrophys. J., 813, 107 (2015/November-2)

Periodic accretion instabilities in the protostar L1634 IRS 7.

HODAPP K.W. and CHINI R.

Abstract (from CDS):

The small molecular cloud Lynds 1634 contains at least three outflow sources. We found one of these, IRS 7, to be variable with a period of 37.14±0.04 days and an amplitude of approximately 2 mag in the Ksband. The light curve consists of a quiescent phase with little or no variation, and a rapid outburst phase. During the outburst phase, the rapid variation in brightness generates light echoes that propagate into the surrounding molecular cloud, allowing a measurement of the distance to IRS 7 of 404 pc±35 pc. We observed only a marginally significant change in the H - K color during the outburst phase. The K-band spectrum of IRS 7 shows CO bandhead emission but its equivalent width does not change significantly with the phase of the light curve. The H21-0 S(1) line emission does not follow the variability of the continuum flux. We also used the imaging data for a proper motion study of the outflows originating from the IRS 7 and the far-infrared source IRAS 05173-0555, and confirm that these are indeed distinct outflows.

Abstract Copyright: ∼

Journal keyword(s): infrared: stars - ISM: jets and outflows - stars: distances - stars: formation - stars: protostars - stars: variables: general

Simbad objects: 38

goto Full paper

goto View the references in ADS

Number of rows : 38
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* T Tau TT* 04 21 59.4319873992 +19 32 06.432393336   11.22 10.12 9.80   K0IV/Ve 1456 1
2 HH 240E HH 05 19 35.9 -05 50 59           ~ 1 0
3 HH 240D HH 05 19 36.6 -05 51 14           ~ 5 0
4 HH 240C HH 05 19 37.233 -05 51 23.32           ~ 5 0
5 HH 240B HH 05 19 38.7 -05 51 23           ~ 5 0
6 HH 979NW2 HH 05 19 39.6 -05 48 39           ~ 2 0
7 HH 240A HH 05 19 40.5 -05 51 42           ~ 10 1
8 HH 240 HH 05 19 40.762 -05 51 44.27           ~ 30 0
9 NVSS J051943-055408 rG 05 19 44.075 -05 54 12.90   17.57   19.27   ~ 7 0
10 HH 240Z HH 05 19 44.1 -05 51 50           ~ 1 0
11 HH 979NW1 HH 05 19 45.3 -05 50 21           ~ 2 0
12 HH 980 HH 05 19 45.6 -05 46 38           ~ 2 0
13 [HL95] LDN 1634 4 PoC 05 19 46.5 -05 50 51           ~ 3 0
14 HH 240Y HH 05 19 47.9 -05 52 03           ~ 1 0
15 NAME HH 240/241 DNe 05 19 48.9 -05 52 05           ~ 115 1
16 HH 241V HH 05 19 49.6 -05 52 04           ~ 1 0
17 HH 979 HH 05 19 51.6 -05 52 10           ~ 2 0
18 JCMTSF J051951.3-055208 Y*O 05 19 52 -05 52.1           ~ 23 0
19 HH 241Z HH 05 19 54.3 -05 52 25           ~ 1 0
20 [HL95] LDN 1634 9 PoC 05 19 56.9 -05 53 12           ~ 3 0
21 HH 241A HH 05 19 57.0 -05 52 24           ~ 9 0
22 HH 241B HH 05 19 58.2 -05 52 21           ~ 3 0
23 HH 241 HH 05 19 58.248 -05 52 23.52           ~ 16 0
24 HH 241D HH 05 20 01.1 -05 52 34           ~ 4 0
25 HH 241E HH 05 20 03.5 -05 52 33           ~ 1 0
26 2MASS J05343542-0539589 Y*O 05 34 35.423 -05 39 58.96           ~ 16 0
27 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
28 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
29 HOPS 383 Y*O 05 35 29.8407 -04 59 51.006           ~ 71 0
30 NAME Ori I As* 05 38 -02.8           ~ 653 0
31 V* V1647 Ori Or* 05 46 13.1370578472 -00 06 04.885093296     18.1     M3.9 317 1
32 NAME Orion Molecular Cloud MoC 05 56 -01.8           ~ 1227 1
33 NGC 2264 OpC 06 40 53.7 +09 52 32           ~ 1876 0
34 IRAS 18272+0114 Or* 18 29 49.13016 +01 16 20.6472           ~ 82 1
35 V* V371 Ser Or* 18 29 51.21240 +01 16 39.4860           ~ 132 1
36 NAME Serpens Cluster As* 18 29 57 +01 14.4           ~ 66 0
37 HH 240B1 HH ~ ~           ~ 2 0
38 HH 240B2 HH ~ ~           ~ 2 0

To bookmark this query, right click on this link: simbad:objects in 2015ApJ...813..107H and select 'bookmark this link' or equivalent in the popup menu