SIMBAD references

2019A&A...625L...8P - Astronomy and Astrophysics, volume 625, L8-8 (2019/5-1)

The evolution of luminous red nova AT 2017jfs in NGC 4470.

PASTORELLO A., CHEN T.-W., CAI Y.-Z., MORALES-GAROFFOLO A., CANO Z., MASON E., BARSUKOVA E.A., BENETTI S., BERTON M., BOSE S., BUFANO F., CALLIS E., CANNIZZARO G., CARTIER R., CHEN P., DONG S., DYRBYE S., ELIAS-ROSA N., FLORS A., FRASER M., GEIER S., GORANSKIJ V.P., KANN D.A., KUNCARAYAKTI H., ONORI F., REGUITTI A., REYNOLDS T., LOSADA I.R., SAGUES CARRACEDO A., SCHWEYER T., SMARTT S.J., TATARNIKOV A.M., VALEEV A.F., VOGL C., WEVERS T., DE UGARTE POSTIGO A., IZZO L., INSERRA C., KANKARE E., MAGUIRE K., SMITH K.W., STALDER B., TARTAGLIA L., THONE C.C., VALERIN G. and YOUNG D.R.

Abstract (from CDS):

We present the results of our photometric and spectroscopic follow-up of the intermediate-luminosity optical transient AT 2017jfs. At peak, the object reaches an absolute magnitude of Mg=-15.46±0.15mag and a bolometric luminosity of 5.5x1041erg/s. Its light curve has the double-peak shape typical of luminous red novae (LRNe), with a narrow first peak bright in the blue bands, while the second peak is longer-lasting and more luminous in the red and near-infrared (NIR) bands. During the first peak, the spectrum shows a blue continuum with narrow emission lines of H and Fe II. During the second peak, the spectrum becomes cooler, resembling that of a K-type star, and the emission lines are replaced by a forest of narrow lines in absorption. About 5 months later, while the optical light curves are characterized by a fast linear decline, the NIR ones show a moderate rebrightening, observed until the transient disappears in solar conjunction. At these late epochs, the spectrum becomes reminiscent of that of M-type stars, with prominent molecular absorption bands. The late-time properties suggest the formation of some dust in the expanding common envelope or an IR echo from foreground pre-existing dust. We propose that the object is a common-envelope transient, possibly the outcome of a merging event in a massive binary, similar to NGC 4490-2011OT1.

Abstract Copyright: © ESO 2019

Journal keyword(s): binaries: close - stars: massive - supernovae: individual: AT 2017jfs - supernovae: individual: NGC 4490-2011OT1 - stars: winds, outflows

VizieR on-line data: <Available at CDS (J/A+A/625/L8): tablea1.dat>

CDS comments: Fig.3 UGC12307-2013OT1 may be a misprint for NAME UGC 2773 OT2009-1 in SIMBAD.

Simbad objects: 16

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2020.10.25-07:45:56

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