2008ApJ...688.1326B


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.04CET19:24:23

2008ApJ...688.1326B - Astrophys. J., 688, 1326-1344 (2008/December-1)

The TEXES survey for H2 emission from protoplanetary disks.

BITNER M.A., RICHTER M.J., LACY J.H., HERCZEG G.J., GREATHOUSE T.K., JAFFE D.T., SALYK C., BLAKE G.A., HOLLENBACH D.J., DOPPMANN G.W., NAJITA J.R. and CURRIE T.

Abstract (from CDS):

We report the results of a search for pure rotational molecular hydrogen emission from the circumstellar environments of young stellar objects with disks using the Texas Echelon Cross Echelle Spectrograph (TEXES) on the NASA Infrared Telescope Facility and the Gemini North Observatory. We searched for mid-infrared H2 emission in the S(1), S(2), and S(4) transitions. Keck/NIRSPEC observations of the H2S(9) transition were included for some sources as an additional constraint on the gas temperature. We detected H2 emission from 6 of 29 sources observed: AB Aur, DoAr 21, Elias 29, GSS 30 IRS 1, GV Tau N, and HL Tau. Four of the six targets with detected emission are class I sources that show evidence for surrounding material in an envelope in addition to a circumstellar disk. In these cases, we show that accretion shock heating is a plausible excitation mechanism. The detected emission lines are narrow (∼10 km/s), centered at the stellar velocity, and spatially unresolved at scales of 0.4", which is consistent with origin from a disk at radii 10-50 AU from the star. In cases where we detect multiple emission lines, we derive temperatures ≳500 K from ∼1 M of gas. Our upper limits for the nondetections place upper limits on the amount of H2 gas with T>500 K of less than a few Earth masses. Such warm gas temperatures are significantly higher than the equilibrium dust temperatures at these radii, suggesting that the gas is decoupled from the dust in the regions that we are studying and that processes such as UV, X-ray, and accretion heating may be important.

Abstract Copyright:

Journal keyword(s): Stars: Circumstellar Matter - Infrared: Stars - Stars: Planetary Systems: Protoplanetary Disks - stars: individual (AB Aur) - Stars: Individual: Alphanumeric: DoAr 21 - Stars: Individual: Name: Elias 29 - stars: individual (GSS 30 IRS 1) - stars: individual (GV Tau N) - stars: individual (HL Tau) - Stars: Pre-Main-Sequence

Simbad objects: 40

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Number of rows : 40

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * 49 Cet PM* 01 34 37.7788265080 -15 40 34.898112472   5.667 5.607   5.54 A1V 249 0
2 V* V512 Per Or* 03 29 03.7567945196 +31 16 03.959183877           ~ 353 0
3 V* V892 Tau Ae* 04 18 40.6120892867 +28 19 15.641672501   16.6 14.69 14.35   A0Ve 270 0
4 LDN 1524 DNe 04 27 57.7 +24 39 18           ~ 74 0
5 LDN 1521F DNe 04 28 39.3 +26 51 43           ~ 188 1
6 V* GV Tau B * 04 29 23.68680 +24 33 01.1160           ~ 30 0
7 V* GV Tau A * 04 29 23.71056 +24 32 58.6176           ~ 26 0
8 V* GV Tau TT* 04 29 23.7314759229 +24 33 00.216016292 19.20         K7 273 2
9 Bad 16 Y*O 04 30 50.2775823865 +23 00 08.771252817       14.95   F1 133 0
10 RAFGL 5123 Y*O 04 31 34.07736 +18 08 04.9020           K3V/M3III 817 0
11 V* HL Tau Or* 04 31 38.471952 +18 13 58.08504   15.89 14.49 14.39   K5 1232 0
12 IRAS 04287+1807 mul 04 31 38.8 +18 13 57           ~ 796 0
13 V* GG Tau Or* 04 32 30.3318954228 +17 31 40.834888327 14.84 14.78 13.40 11.54   M0e+M2.0e 658 1
14 EM* LkCa 15 Or* 04 39 17.7912813350 +22 21 03.387667491   13.01 12.03 11.61   K5:Ve 568 1
15 V* GM Aur Or* 04 55 10.9813656049 +30 21 59.375978047 14.59 14.22 13.10     K3Ve 560 0
16 V* AB Aur Ae* 04 55 45.8459978418 +30 33 04.293281305 7.20 7.16 7.05 6.96 6.70 A0Ve 944 2
17 V* RW Aur TT* 05 07 49.5662483 +30 24 05.177426   10.86 9.60 9.95   K1/5e+K5e 723 0
18 V* GW Ori Or* 05 29 08.3925564419 +11 52 12.653756566   10.83 10.10 9.52   G5/8Ve 304 0
19 HD 36112 Ae* 05 30 27.5286772598 +25 19 57.082162439   8.57 8.27     A8Ve 369 0
20 NAME Orion Bright Bar reg 05 35 22.30 -05 24 33.0           ~ 734 0
21 V* FU Ori Or* 05 45 22.3650208559 +09 04 12.296285806   10.72 9.60     F0Iab 724 1
22 V* Z CMa Ae* 07 03 43.1588002461 -11 33 06.230351311 10.51 9.99 8.80     B5/8eq+F5/7 535 3
23 V* TW Hya TT* 11 01 51.9054298616 -34 42 17.031550898   11.94 10.50 10.626 9.18 K6Ve 1571 1
24 HD 97048 Ae* 11 08 03.3105687971 -77 39 17.491180130 9.03 8.76 9.00   8.64 A0Vep 464 0
25 HD 141569 pr* 15 49 57.7484743862 -03 55 16.344023102 7.22 7.20 7.12 7.00 7.04 A2VekB9mB9(_lB) 476 0
26 * rho Oph ** 16 25 35.11766 -23 26 49.8150 4.30 4.85 4.63 4.27 3.96 B2IV+B2V 616 0
27 Haro 1-6 Or* 16 26 03.0281201322 -24 23 36.193999164   14.15 14.01 12.38 10.80 K0 208 1
28 GSS 30 Y*O 16 26 21.38160 -24 23 04.0524           ~ 200 1
29 NAME VLA 1623-243 Y*O 16 26 26.42 -24 24 30.0           ~ 375 0
30 [SSG2006] MMS002 smm 16 26 26.50 -24 24 30.9           ~ 241 0
31 Elia 2-29 Y*O 16 27 09.43032 -24 37 18.7716           ~ 267 1
32 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3088 0
33 EM* AS 209 Or* 16 49 15.3035547820 -14 22 08.642015783   12.62 11.28     K4Ve 246 0
34 * c Oph Be* 17 31 24.9541340 -23 57 45.513592 4.75 4.81 4.81 4.74 4.72 A0V 256 0
35 HD 163296 Ae* 17 56 21.2882188601 -21 57 21.872343282 7.00 6.93 6.85 6.86 6.67 A1Vep 825 0
36 V* VV Ser Ae* 18 28 47.8619658319 +00 08 39.924642619 12.99 12.63 11.80 11.01 10.24 A5Ve 230 0
37 EM* AS 353 Or* 19 20 30.9919486938 +11 01 54.604157558   13.22 12.21     K5 183 1
38 EM* LkHA 225 Ae* 20 20 30.5937486026 +41 21 26.337058307   18.2 19.17     A4:Ve 72 0
39 EM* LkHA 190 Or* 20 58 53.7336698326 +44 15 28.384667940   14.26 12.33 12.13   F7/G3I/IIe 479 0
40 EM* LkHA 120 Or* 21 01 09.2068364908 +50 21 44.803310926 13.37 13.09 11.99 11.75   F0/F4-G5 187 1

    Equat.    Gal    SGal    Ecl

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2020.12.04-19:24:23

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