2009ApJ...696.1964M


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.24CEST07:51:15

2009ApJ...696.1964M - Astrophys. J., 696, 1964-1971 (2009/May-2)

A substantial dust disk surrounding an actively accreting first-ascent giant star.

MELIS C., ZUCKERMAN B., SONG I., RHEE J.H. and METCHEV S.

Abstract (from CDS):

We report identification of the first unambiguous example of what appears to be a new class of first-ascent giant stars that are actively accreting gas and dust and that are surrounded by substantial dusty disks. These old stars, who are nearing the end of their lives, are experiencing a rebirth into characteristics typically associated with newborn stars. The F2-type first-ascent giant star TYC 4144 329 2 is in a wide separation binary system with an otherwise normal G8 IV star, TYC 4144 329 1. From Keck near-infrared imaging and high-resolution spectroscopy, we are able to determine that these two stars are ∼1 Gyr old and reside at a distance of ∼550 pc. One possible explanation for the origin of the accreting material is common-envelope interaction with a low-mass stellar or substellar companion. The gaseous and dusty material around TYC 4144 329 2, as it is similar to the primordial disks observed around young classical T Tauri stars, could potentially give rise to a new generation of planets and/or planetesimals.

Abstract Copyright:

Journal keyword(s): binaries: close - circumstellar matter - infrared: stars - stars: evolution - stars: individual (TYC 4144-329-1, TYC 4144-329-2)

Simbad objects: 12

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Number of rows : 12

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 * tau Cet PM* 01 44 04.0834226 -15 56 14.926552 4.43 4.22 3.50 2.88 2.41 G8V 1064 1
2 HD 31550 PM* 04 58 28.4741659775 +37 19 44.517854481   7.05 6.75     A5 19 0
3 HD 31662 ** 05 01 36.04331 +61 04 40.7858           F4V 44 0
4 HD 33924 PM* 05 17 27.5831410750 +60 10 53.982055706   7.406 6.952     F5 31 0
5 * bet Pic PM* 05 47 17.0876901 -51 03 59.441135 4.13 4.03 3.86 3.74 3.58 A6V 1597 1
6 HD 233517 * 08 22 46.7144627395 +53 04 49.232441095   10.85 9.71     K2 78 0
7 TYC 4144-329-2 * 10 23 09.8688271730 +61 36 43.432941163   11.35 10.74     ~ 10 0
8 BD+62 1122 * 10 23 10.5645330779 +61 36 45.993362050   11.01 10.11     ~ 4 0
9 * del Boo PM* 15 15 30.1629518 +33 18 53.392558 5.12 4.44 3.49 2.76 2.25 G8IIIFe-1 353 0
10 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11007 0
11 HD 171994 PM* 18 37 09.0599594126 +16 11 53.861767227   7.212 6.307     G8IV 38 0
12 * gam Cap a2* 21 40 05.4564778 -16 39 44.307184 4.19 3.98 3.67 3.47 3.34 kF0hF1VmF2 184 0

    Equat.    Gal    SGal    Ecl

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2019.10.24-07:51:15

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