2007A&A...461..977M


Query : 2007A&A...461..977M

2007A&A...461..977M - Astronomy and Astrophysics, volume 461, 977-982 (2007/1-3)

The stellar population of the Rosat North Ecliptic Pole survey.

MICELA G., AFFER L., FAVATA F., HENRY J.P., GIOIA I., MULLIS C.R., SANZ FORCADA J. and SCIORTINO S.

Abstract (from CDS):

X-ray surveys are a very efficient mean of detecting young stars and therefore allow us to study the young stellar population in the solar neighborhood and the local star formation history in the last billion of years. We want to study the young stellar population in the solar neighborhood, to constrain its spatial density and scale height as well as the recent local star formation history. We analyze the stellar content of the ROSAT North Ecliptic Pole survey, and compare the observations with the predictions derived from stellar galactic model. Since the ROSAT NEP survey is sensitive at intermediate fluxes is able to sample both the youngest stars and the intermediate age stars (younger than 109years), linking the shallow and deep flux surveys already published in the literature. We confirm the existence of an excess of yellow stars in our neighborhood previously seen in shallow survey, which is likely due to a young star population not accounted for in the model. However the excellent agreement between observations and predictions of dM stars casts some doubt on the real nature of this active population.

Abstract Copyright:

Journal keyword(s): stars: activity - stars: coronae - X-rays: stars - Galaxy: solar neighbourhood

VizieR on-line data: <Available at CDS (J/A+A/461/977): table1.dat table2.dat>

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 32

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Number of rows : 32
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 HD 2506 * 00 29 14.2627559568 +59 28 10.125819768   8.98 8.03     G4III 30 0
2 HD 4628 PM* 00 48 22.9759750919 +05 16 50.209484954 7.22 6.64 5.74 4.99 4.52 K2.5V 499 0
3 HD 5351 PM* 00 57 04.4100969645 +69 02 36.436427782   10.13   8.5   K4V 83 0
4 HD 6111 PM* 01 03 31.0333176024 +61 56 14.722492524   9.43 8.9     G5 15 0
5 BD+63 137 PM* 01 07 08.1981313437 +63 56 28.778073512   10.28   8.2   K7V 108 0
6 HD 10032 * 01 38 48.0502171272 +40 45 38.859439788   8.81 8.46     F0V 25 0
7 * 107 Psc PM* 01 42 29.7625251280 +20 16 06.645657710 6.57 6.08 5.24 4.55 4.12 K1V 551 0
8 BD+37 448 * 01 58 52.9027843464 +37 48 57.229263828   10.07 9.04     G9III 82 0
9 Cl Melotte 22 OpC 03 46 24.2 +24 06 50           ~ 3411 0
10 Cl Melotte 25 OpC 04 29 47.3 +16 56 53           ~ 3050 0
11 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4374 0
12 HD 66171 PM* 08 08 10.5436001589 +71 55 27.954368486   8.82   7.8   G2V 97 0
13 HD 70178 * 08 21 33.8226239784 +28 49 04.461022632   9.04 8.23     G5IV 19 0
14 HD 78277 PM* 09 08 02.7431711832 +27 33 32.473261404   8.85 8.20     G2IV 33 0
15 HD 237822 PM* 09 36 49.5206880772 +57 54 41.015334894   10.59   9.6   G3V 49 0
16 HD 83140 * 09 42 15.0242426400 +77 32 51.661901112   9.10 8.65     F3IV 21 0
17 V* AD Leo Er* 10 19 36.2808181226 +19 52 12.010446571   10.82 9.52 9.19   dM3 1323 1
18 * 61 UMa PM* 11 41 03.0162706212 +34 12 05.881605449 6.31 6.08 5.34 4.73 4.38 G8V 611 0
19 * omi Vir SB* 12 05 12.5318326945 +08 43 58.866875781 5.75 5.11 4.12 3.38 2.89 G8IIICN0.5CH1Ba1 286 0
20 NAME Chandra Deep Field-North reg 12 36.8 +62 13           ~ 658 0
21 HD 110964 LP? 12 45 36.9868548576 +27 07 44.207357592   10.69 9.12     M4III 24 0
22 HD 112872 PM* 12 59 26.0798881728 +30 26 02.051929248   10.51 9.71     G9V 14 0
23 * eps Vir PM* 13 02 10.5970152536 +10 57 32.935398266 4.45 3.71 2.79 2.16 1.71 G8III-IIIb 551 0
24 HD 158063 * 17 21 10.4373888048 +69 48 02.547864000   7.99 7.38     F8 28 0
25 HD 158460 * 17 25 41.3535370032 +60 02 54.233277972   5.666 5.645     A1Vn 51 0
26 NAME NEP reg 18 00 00.000 +66 33 38.55           ~ 352 0
27 HD 167370 * 18 13 04.8190296720 +38 46 24.566041776 5.78 5.966 6.033     B9IIIn 43 0
28 * kap Del PM* 20 39 07.7867477765 +10 05 10.291671448   5.77   4.6   G2IV 197 0
29 * 61 Cyg B Er* 21 06 55.2638444466 +38 44 31.358519864 8.63 7.40 6.03 4.86 3.55 K7V 718 0
30 * iot Peg SB* 22 07 00.6655101792 +25 20 42.356386464 4.190 4.200 3.770 3.36 3.11 F5V 442 1
31 HD 219134 Er* 23 13 16.9749603608 +57 10 06.083823619 7.460 6.560 5.570 4.76 4.23 K3V 597 1
32 NAME Gould Belt PoG ~ ~           ~ 861 1

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