2011A&A...526L...1C


C.D.S. - SIMBAD4 rel 1.7 - 2019.08.26CEST10:18:56

2011A&A...526L...1C - Astronomy and Astrophysics, volume 526, L1-1 (2011/2-1)

The outburst of an embedded low-mass YSO in L1641.

CARATTI O GARATTI A., GARCIA LOPEZ R., SCHOLZ A., GIANNINI T., EISLOEFFEL J., NISINI B., MASSI F., ANTONIUCCI S. and RAY T.P.

Abstract (from CDS):

Strong outbursts in very young and embedded protostars are rare and not yet fully understood. They are believed to originate from an increase in the mass accretion rate ({dot}(M)acc) onto the source. We report the discovery of a strong outburst in a low-mass embedded young stellar object (YSO), namely 2MASS-J05424848-0816347 or [CTF93]216-2, as well as its photometric and spectroscopic follow-up. Using near- to mid-IR photometry and NIR low-resolution spectroscopy, we monitor the outburst, deriving its magnitude, duration, as well as the enhanced accretion luminosity and mass accretion rate. [CTF93]216-2 increased in brightness by ∼4.6, 4.0, 3.8, and 1.9mag in the J, H, Ks bands and at 24µm, respectively, corresponding to an Lbol increase of ∼20L. Its early spectrum, probably taken soon after the outburst, displays a steep almost featureless continuum, with strong CO band heads and H2O broad-band absorption features, and Brγ line in emission. A later spectrum reveals more absorption features, allowing us to estimate Teff∼3200K, M*∼0.25M, and {dot}(M)acc∼1.2x10–6M/yr. This makes it one of the lowest mass YSOs with a strong outburst so far discovered.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - stars: formation - ISM: jets and outflows - infrared: ISM

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 LDN 1641 MoC 05 39.0 -07 00           ~ 416 0
2 2MASS J05424706-0817069 Y*O 05 42 47.067 -08 17 06.93           M5 47 0
3 V* V2775 Ori FU* 05 42 48.488 -08 16 34.74           M 39 1
4 V* V1647 Ori FU* 05 46 13.1370923766 -00 06 04.876812846     18.1     ~ 220 1
5 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 874 2
6 V* OO Ser FU* 18 29 49.130 +01 16 20.65           ~ 57 1

    Equat.    Gal    SGal    Ecl

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2019.08.26-10:18:56

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