Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-12-01
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
To be published in A&A letter; 5 pages, 4 figures
Scientific paper
Strong outbursts in very young and embedded protostars are rare and not yet fully understood. They are believed to originate from an increase of the mass accretion rate 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 1.9 mag in the J, H, Ks bands and at 24 um, respectively, corresponding to an L_bol increase of ~20 L_sun. Its early spectrum, probably taken soon after the outburst, displays a steep almost featureless continuum, with strong CO band heads and H_2O broad-band absorption features, and Br gamma line in emission. A later spectrum reveals more absorption features, allowing us to estimate T_eff~3200 K, M~0.25 M_sun, and mass accretion rate~1.2x10^{-6} M_sun yr^{-1}. This makes it one of the lowest mass YSOs with a strong outburst so far discovered.
Antoniucci Simone
Caratti Garatti Alessio o.
Eislöffel Jochen
Giannini Teresa
Lopez Ramon Garcia
No associations
LandOfFree
The outburst of an embedded low-mass YSO in L1641 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The outburst of an embedded low-mass YSO in L1641, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The outburst of an embedded low-mass YSO in L1641 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-602220