17 Planetary Systems Around M Dwarfs

in order of increasing stellar mass

revised June 2010

 

Star

Type

Mass

(MSOL)

[Fe/H]

Distance

Parsecs

P

Mass

a

(AU)

e

Period

 

 

 

 

 

 

 

 

 

 

GJ 1214

M4.5

0.16

+0.28

13.0

b

6.55 E

0.014

0

1.58 d

 

GJ 317

M3.5

0.24

-0.20

9.17

b

1.2 J

0.95

0.19

693 d

 

GJ 581

M3

0.31

-0.22

6.27

e

1.94 E

0.03

0.00

3.1 d

GJ 581

M3

0.31

-0.10

6.27

b

15.7 E

0.04

0.00

5.4 d

GJ 581

M3

0.31

-0.10

6.27

c

5.36 E

0.07

0.17

12.9 d

GJ 581

M3

0.31

-0.10

6.27

d

7.09 E

0.22

0.38

66.8 d

 

GJ 876

M4

0.33

+0.23

4.69

d

6.83 E

0.02

0.21

1.94 d

GJ 876

M4

0.32

+0.37

4.70

c

0.71 J

0.13

0.26

30.1 d

GJ 876

M4

0.32

+0.37

4.70

b

2.28 J

0.21

0.03

61.1 d

GJ 876

M4

0.32

+0.37

4.70

e

14.6 E

0.33

0.06

124 d

 

HIP 57050

M4

0.34

+0.32

11.0

b

0.28 J

0.16

0.19

41.4 d

 

GJ 674

M2.5

0.35

-0.24

4.54

b

10.5 E

0.04

0.20

4.7 d

 

GJ 179

M3.5

0.36

+0.20

12.3

b

0.82 J

2.41

0.21

6.26 yr

 

GJ 667C *

M1.5

-

-

6.97

b

5.7 E

~0.05

0

~7 d

 

GJ 676A *

M0

-

-

16.1

b

4.0 J

-

-

2.75 yr

 

HIP 12961 *

M0

-

-

23.8

b

0.47 J

-

-

57 d

 

GJ 832

M1.5

0.45

-0.24

4.93

b

0.64 J

3.4

0.12

~9 yr

 

GJ 436

M2.5

0.47

+0.10

10.2

b

22.6 E

0.03

0.14

2.64 d

 

GJ 433 *

M1.5

0.48

-

9.04

b

6.0 E

~0.05

0

~7 d

 

GJ 849

M3.5

0.49

+0.41

8.77

b

0.83 J

2.35

0.07

~5 yr

 

HIP 79431

M3

0.49

+0.35

14.4

b

2.1 J

0.36

0.29

112 d

 

GJ 176

M2

0.50

+0.18

9.40

b

8.4 E

0.07

0

8.8 d

 

GJ 649

M1.5

0.54

-0.03

10.34

b

0.33 J

1.14

0.30

598 d

 

 

Notes: Column 1 gives the star name. Column 2 gives the spectral type. Column 3 gives the star mass as a fraction of our Sun. Column 4 gives the star metallicity (Sol = 0). Column 5 gives the star's distance from Earth in parsecs and light years. Column 6 gives the planet designation. Column 7 gives the planet mass, expressed in terms of Jupiter mass for gas giant planets (mass > 0.2 Mjup) and Earth mass for icy and terrestrial planets. Column 8 gives the planet's distance from the host star in astronomical units. Column 9 gives the orbital eccentricity. Column 10 gives the orbital period, either in days (d) or in years (yr) as appropriate.

* Preliminary data from the Extrasolar Planets Encyclopaedia pending publication of discovery papers.

† Stellar mass from Zechmeister et al. 2009 (A&A 505:859-871).

As available, metallicities follow Schlaufman & Laughlin 2010 (A&A in press).

Data on GJ 1214 from Charbonneau et al. 2009 (Nature 462:891-894); GJ 317 from Johnson et al. 2007 (ApJ 670:833–840); GJ 581 from Udry et al. 2007 (A&A 469:L43–L47), Mayor et al. 2009 (A&A 507:487-494); GJ 876 from Rivera et al. 2010 (ApJ in press); HIP 57050 from Haghighipour et al. 2010 (ApJ 715:271–276); GJ 674 from Bonfils et al. 2007 (A&A 474:293-299); GJ 179 from Howard et al 2010 (ApJ in press); GJ 832 from Bailey et al. 2009 (ApJ 690:743-747); HIP 79431 from Apps et al. 2010 (PASP 122:156-161); GJ 176 from Forveille et al. 2009 (A&A 493:645-650); GJ 649 from Johnson et al. 2010 (PASP 122:149-155). Other data from Bean et al. 2006 (ApJ 653:L65-L68), Butler et al. 2006 (PASP 108), and the Catalog of Nearby Exoplanets.

 

 

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