2018AJ....155...63S


Query : 2018AJ....155...63S

2018AJ....155...63S - Astron. J., 155, 63-63 (2018/February-0)

More rapidly rotating PMS M dwarfs with light curves suggestive of orbiting clouds of material.

STAUFFER J., REBULL L., DAVID T.J., JARDINE M., CAMERON A.C., CODY A.M., HILLENBRAND L.A., BARRADO D., VAN EYKEN J., MELIS C. and BRICENO C.

Abstract (from CDS):

In a previous paper, using data from K2 Campaign 2, we identified 11 very low mass members of the ρ Oph and Upper Scorpius star-forming region as having periodic photometric variability and phased light curves showing multiple scallops or undulations. All of the stars with the "scallop-shell" light curve morphology are mid-to-late M dwarfs without evidence of active accretion and with photometric periods generally <1 day. Their phased light curves have too much structure to be attributed to non-axisymmetrically distributed photospheric spots and rotational modulation. We have now identified an additional eight probable members of the same star-forming region plus three stars in the Taurus star-forming region with this same light curve morphology and sharing the same period and spectral type range as the previous group. We describe the light curves of these new stars in detail and present their general physical characteristics. We also examine the properties of the overall set of stars in order to identify common features that might help elucidate the causes of their photometric variability.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): stars: pre-main sequence - stars: variables: T Tauri, Herbig Ae/Be - stars: variables: T Tauri, Herbig Ae/Be

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 Cl Melotte 22 OpC 03 46 24.2 +24 06 50           ~ 3411 0
2 2MASS J04405340+2055471 LM* 04 40 53.4091110672 +20 55 47.007856596   18.8   17.1 15.1 M5e 8 0
3 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4376 0
4 UCAC4 522-009859 Y*O 04 59 04.707888 +14 20 55.95612   16.13 14.63 14.40   M5e 3 0
5 CRTS J045928.3+141623 Y*O 04 59 28.4128476744 +14 16 23.882035548   17.07 15.52 15.12   M3.5e 4 0
6 K2-22 LM* 11 17 55.8772962552 +02 37 08.603363784   17.04 15.60 15.38   K7V 37 0
7 UCAC4 332-079645 Ro* 16 08 39.0880278888 -23 40 05.623575348       14.01 11.63 M3.25 13 0
8 UCAC4 331-082648 LM* 16 10 56.1889989576 -23 49 28.939347084       14.74 12.06 M4.5e 10 0
9 NAME Upper Sco Association As* 16 12 -23.4           ~ 1359 1
10 UCAC4 358-078274 LM* 16 18 41.8924236744 -18 32 39.838598628       15.40 12.65 M5e 6 0
11 2MASS J16210509-2527424 LM* 16 21 05.1009670944 -25 27 42.369525576           M5.5e 9 0
12 V* V2304 Oph Or* 16 25 52.8252648720 -23 19 36.707024460   14.97   13.1 11.213 M1.5e 10 0
13 WLY 2-11 TT* 16 25 56.0972220312 -24 30 14.944182804       16.80 14.52 M5 21 0
14 NAME rho Oph Cluster Cl* 16 26 22 -24 23.7           ~ 70 0
15 UCAC4 318-090278 Y*O 16 26 27.8594465352 -26 25 15.177890748       15.20   M4.5 8 0
16 BKLT J162800-244819 TT* 16 27 59.9574061344 -24 48 19.319153868   17.3 17.42 15.83 13.44 M4.75 34 0
17 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3596 1
18 Kepler-1520 Er* 19 23 51.8899191552 +51 30 16.983425232   17.130 16.117 15.772   ~ 76 1

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