2011A&A...525A..10R


C.D.S. - SIMBAD4 rel 1.7 - 2020.04.04CEST08:49:02

2011A&A...525A..10R - Astronomy and Astrophysics, volume 525A, 10-10 (2011/1-1)

Large-amplitude photometric variability of the candidate protoplanet TMR-1C.

RIAZ B. and MARTIN E.L.

Abstract (from CDS):

TMR-1C is a candidate protoplanet that lies at a separation of about 10" (∼1000 AU) from the Class I protobinary TMR-1 (IRAS 04361+2547) located in the Taurus molecular cloud. A narrow filament-like structure was observed in the discovery HST/NICMOS images, extending southeast from the central proto-binary system towards TMR-1C, suggesting a morphology in which the candidate protoplanet may have been ejected from the TMR-1 system. Follow-up low-resolution spectroscopy, however, could not confirm if this object is a protoplanet or a low-luminosity background star. We present two epochs of near-infrared photometric observations obtained at the CFHT of TMR-1C. The time span of ∼7 years between the two sets of observations provides an opportunity to (a) check for any photometric variability similar to that observed among young stellar objects, which would indicate the youth of this source, and to (b) determine the proper motion. TMR-1C displays large photometric variability between 1 and 2mag in both the H- and Ks-bands. From our 2002 observations, we find a (H-Ks) color of 0.3mag, which is much bluer than the value of 1.3mag reported by T98 from HST observations. Also, we observe brightening in both the H- and Ks-bands when the colors are bluer; i.e., the object gets redder as it becomes fainter. We have explored the possible origins for the observed variability, and find extinction due to the presence of circumstellar material to be the most likely scenario. The observed large-amplitude photometric variations and the possible presence of a circumstellar disk are strong arguments against this object being an old background star.

Abstract Copyright:

Journal keyword(s): stars: individual: TMR-1 - stars: protostars - planetary systems

Status at CDS:  

CDS comments: Fig.4, paragraph 4.4 LOri67 is a probable misprint for lOri-CFHT 167. Fig.4 some objects not identified (wrong format).

Simbad objects: 22

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Number of rows : 22

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1198 0
2 TMR 1B IR 04 39 13.89 +25 53 20.4           ~ 8 0
3 IRAS 04361+2547 Y*O 04 39 13.89767 +25 53 20.6340           ~ 184 1
4 TMR 1C Pl? 04 39 13.898 +25 53 20.63           ~ 24 1
5 TMR 1A IR 04 39 13.90 +25 53 20.6           ~ 8 0
6 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3400 0
7 * lam Ori ** 05 35 08.27761 +09 56 02.9611 2.45 3.48 3.66 3.72 3.89 O8IIIf+B0.5V 264 1
8 LOri-CFHT 167 * 05 35 14.149 +09 54 07.91 21.997     23.86 20.90 ~ 9 0
9 NAME Ori I As* 05 38 -02.8           ~ 551 0
10 [BMZ2001] S Ori J053810.1-023626 BD* 05 38 10.10 -02 36 26.0           T6 46 1
11 2MASS J05383888-0228016 Y*O 05 38 38.8911596595 -02 28 01.731339488 20.95 21.83   18.77 16.99 M5Ve 24 0
12 [BZR99] S Ori 68 BD* 05 38 39.1 -02 28 05         23.77 L5: 24 1
13 NAME sigma Orionis Cluster MGr 05 38 42 -02 36.0           ~ 481 0
14 V* V582 Mon Or* 06 41 10.34 +09 28 33.3   17.404   17.21 16.45 K5 161 0
15 2MASS J11011926-7732383 BD* 11 01 19.266 -77 32 38.31       19.4 16.59 M7.25 36 1
16 NAME Cha I MoC 11 06 48 -77 18.0           ~ 953 1
17 EQ J110814.2-773649 ? 11 08 14.2 -77 36 49           ~ 2 1
18 UScoCTIO 108 LM* 16 05 54.0747365035 -18 18 44.380483038           M7 34 0
19 NAME Upper Sco Association As* 16 12 -23.4           ~ 990 1
20 NAME Oph J1622-2405 ** 16 22 25.21392 -24 05 13.9488       19.4 18.98 M9+M9.5 36 0
21 2MASS J16233609-2402209 Y*? 16 23 36.09 -24 02 20.9       17.4 14.68 M5 16 0
22 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 2981 0

    Equat.    Gal    SGal    Ecl

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2020.04.04-08:49:02

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